# C_2008152EN.01000101.xml

| 18.6.2008 | EN | Official Journal of the European Union | C 152/1 |
| --- | --- | --- | --- |

18.6.2008

EN

Official Journal of the European Union

C 152/1

---

Communication from the Commission on the results of the risk evaluation and the risk reduction strategies for the substances: chromium trioxide, ammonium dichromate, potassium dichromate

(Text with EEA relevance)

(2008/C 152/01)

Council Regulation (EEC) No 793/93 of 23 March 1993 on the evaluation and control of the risks of existing substances (1) involves the data reporting, priority setting, risk evaluation and, where necessary, development of strategies for limiting the risks of existing substances.

1

In the framework of Regulation (EEC) No 793/93 the following substances have been identified as priority substances for evaluation in accordance with Commission Regulation (EC) No 143/97 (2) concerning the third list of priority substances as foreseen under Regulation (EEC) No 793/93:

2

| — | chromium trioxide, |
| --- | --- |

—

chromium trioxide,

| — | ammonium dichromate, |
| --- | --- |

—

ammonium dichromate,

| — | potassium dichromate. |
| --- | --- |

—

potassium dichromate.

The rapporteur Member State designated pursuant to that Regulation has completed the risk evaluation activities with regard to man and the environment for those substances in accordance with Commission Regulation (EC) No 1488/94 of 28 June 1994 laying down the principles for the assessment of risks to man and the environment of existing substances (3) and has suggested a strategy for limiting the risks in accordance with Regulation (EEC) No 793/93.

3

The Scientific Committee on Toxicity, Ecotoxicity and the Environment (SCTEE) has been consulted and has issued an opinion with respect to the risk evaluations carried out by the rapporteur. The opinion can be found on the website of the Scientific Committee.

Article 11(2) of Regulation (EEC) No 793/93 stipulates that the results of the risk evaluation and the recommended strategy for limiting the risks shall be adopted at Community level and published by the Commission. This Communication, together with the corresponding Commission Recommendation 2008/455/EC (4), provides the results of risk evaluations (5) and strategies for limiting the risks for the above mentioned substances.

4

5

The results of the risk evaluation and strategies for limiting the risks provided for in this communication are in accordance with the opinion of the Committee set up pursuant to Article 15(1) of Regulation (EEC) No 793/93.

---

(1)  OJ L 84, 5.4.1993, p. 1.

1

(2)  OJ L 25, 28.1.1997, p. 13.

2

(3)  OJ L 161, 29.6.1994, p. 3.

3

(4)  OJ L 158, 18.6.2008.

4

(5)  The comprehensive Risk Assessment Report, as well as a summary thereof, can be found on the Internet site of the European Chemicals Bureau:

5

http://ecb.jrc.it/existing-substances/

---

ANNEX

PART 1

| CAS No: 1333-82-0 | | Einecs No: 215-607-8 |
| --- | --- | --- |
| Molecular formula: | CrO3 |
| Einecs name: | Chromium trioxide |
| IUPAC name: | Chromium trioxide |
| Rapporteur: | United Kingdom |
| Classification (1): | O; R9
  Carc. Cat. 1; R45
  Muta. Cat. 2; R46
  Repr. Cat. 3; R62
  T+; R26
  T; R24/25-48/23
  C; R35
  R42/43
  N; R50-53 |

CAS No: 1333-82-0

Einecs No: 215-607-8

Molecular formula:

CrO3

Einecs name:

Chromium trioxide

IUPAC name:

Chromium trioxide

Rapporteur:

United Kingdom

Classification (1):

O; R9

Carc. Cat. 1; R45

Muta. Cat. 2; R46

Repr. Cat. 3; R62

T+; R26

T; R24/25-48/23

C; R35

R42/43

N; R50-53

The risk assessment is based on current practices related to the life-cycle of the five related chromium (VI) substances, chromium trioxide, ammonium dichromate, potassium dichromate, sodium chromate and sodium dichromate produced in or imported into the European Community as described in the risk assessment forwarded to the Commission by the Member State Rapporteur (2).

The risk assessment has, based on the available information, determined that in the European Community the five chromium (VI) compounds are mainly used as source materials for other chromium (VI) and chromium (III) compounds, in wood preservatives, in metal treatment products, in wax and vitamin K manufacture, in pigments and catalysts.

Other uses are as oxidants in dyeing of cotton, in photography, and as a corrosion inhibitor in cooling water and in manufacture of activated carbon.

RISK ASSESSMENT

A.   Human health

The conclusion of the assessment of the risks to

WORKERS

is that there is a need for specific measures to limit the risks. This conclusion is reached for all exposure scenarios because:

| — | concerns for respiratory tract sensory irritation, |
| --- | --- |

—

concerns for respiratory tract sensory irritation,

| — | concerns for eye and skin irritation, |
| --- | --- |

—

concerns for eye and skin irritation,

| — | concerns for acute toxicity as a consequence of short-term peak inhalation exposure, |
| --- | --- |

—

concerns for acute toxicity as a consequence of short-term peak inhalation exposure,

| — | concerns for skin sensitisation, |
| --- | --- |

—

concerns for skin sensitisation,

| — | concerns for occupational asthma, |
| --- | --- |

—

concerns for occupational asthma,

| — | concerns for reproductive toxicity (fertility and developmental toxicity) as a consequence of repeated inhalation exposure, |
| --- | --- |

—

concerns for reproductive toxicity (fertility and developmental toxicity) as a consequence of repeated inhalation exposure,

| — | concerns for mutagenicity and carcinogenicity. |
| --- | --- |

—

concerns for mutagenicity and carcinogenicity.

The substance has not been sufficiently tested for effects to the respiratory tract and to the kidney as a consequence of repeated inhalation exposure to the chromium (VI) compounds, specifically to identify the NOAELs and dose-response characteristics. However, as the substance has been identified as a non-threshold carcinogen, it normally requires control measures that would not be influenced by further information.

The conclusion of the assessment of the risks to

CONSUMERS

is that there is a need for specific measures to limit the risks. This conclusion is reached because:

| — | concerns for mutagenicity and carcinogenicity as a consequence of dermal exposure arising from handling of dry copper chrome arsenate (CCA)-treated wood, both for adults and for children exposed via wooden playing structures because no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures. |
| --- | --- |

—

concerns for mutagenicity and carcinogenicity as a consequence of dermal exposure arising from handling of dry copper chrome arsenate (CCA)-treated wood, both for adults and for children exposed via wooden playing structures because no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures.

No formal risk characterisation has been conducted for consumer exposure to wet CCA treated wood. In the UK the supply of wood not fully dried following CCA treatment is prohibited as a condition of approval under the Control of Pesticides Regulations (1986). Similar controls may already exist in all other Member States. However, if specific controls are not available in each Member State, then there would be concerns for all relevant human health endpoints.

The conclusion of the assessment of the risks to

HUMANS EXPOSED VIA THE ENVIRONMENT

is that there is a need for specific measures to limit the risks. This conclusion is reached because:

| — | for mutagenicity and carcinogenicity no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures. |
| --- | --- |

—

for mutagenicity and carcinogenicity no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures.

The conclusion of the assessment of the risks to

HUMAN HEALTH (physico-chemical properties)

is that there is at present no need for further information and/or testing or for risk reduction measures beyond those which are being applied. This conclusion is reached because:

| — | the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient. |
| --- | --- |

—

the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient.

B.   Environment

The conclusion of the assessment of the risks to the

ATMOSPHERE

is that there is at present no need for further information and/or testing or for risk reduction measures beyond those which are being applied. This conclusion is reached because:

| — | the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient. |
| --- | --- |

—

the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient.

The conclusion of the assessment of the risks to the environment for

AQUATIC ECOSYSTEM AND TERRESTRIAL ECOSYSTEM

| 1. | is that there is a need for further information and/or testing. This conclusion is reached because of:






  — | concerns for effects on the sediment compartment as a consequence of exposure arising from production, pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation, and metal treatment. |
| --- | --- | --- |

1.

is that there is a need for further information and/or testing. This conclusion is reached because of:

—

concerns for effects on the sediment compartment as a consequence of exposure arising from production, pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation, and metal treatment.

The information and/or testing requirements are:

| — | toxicity testing on sediment organisms. |
| --- | --- |

—

toxicity testing on sediment organisms.

However, the implementation of the strategy for limiting risks for the environment, together with the corresponding Commission Recommendation 2008/455/EC (3), is expected to eliminate the need for further information requirements,

| — | concerns for non-compartment specific effects as a consequence of indirect exposure of predators through the mussel-based food chain arising from pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- |

—

concerns for non-compartment specific effects as a consequence of indirect exposure of predators through the mussel-based food chain arising from pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment.

The information and/or testing requirements are:

| — | further investigation of the uptake of chromium into organisms other than fish, characterisation of the nature of the chromium in organisms and consideration of the toxicity of chromium in other forms to organisms consuming prey containing chromium. |
| --- | --- |

—

further investigation of the uptake of chromium into organisms other than fish, characterisation of the nature of the chromium in organisms and consideration of the toxicity of chromium in other forms to organisms consuming prey containing chromium.

However, the implementation of the strategy for limiting the risks for the environment, together with the corresponding Recommendation 2008/455/EC, is expected to eliminate the need for further information requirements;

| 2. | is that there is a need for specific measures to limit the risks. This conclusion is reached because of:






  — | concerns for effects on the aquatic and terrestrial environment as a consequence of exposure arising from production (aquatic only, one site), pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- | --- |

2.

is that there is a need for specific measures to limit the risks. This conclusion is reached because of:

—

concerns for effects on the aquatic and terrestrial environment as a consequence of exposure arising from production (aquatic only, one site), pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation and metal treatment.

The conclusion of the assessment of the risks to

MICRO-ORGANISMS IN THE SEWAGE TREATMENT PLANT

is that there is a need for specific measures to limit the risks. This conclusion is reached because of:

| — | concerns for effects on the functioning of waste water treatment plants due to pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- |

—

concerns for effects on the functioning of waste water treatment plants due to pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment.

STRATEGY FOR LIMITING RISKS

For WORKERS

The legislation for workers' protection currently in force at Community level, particularly Directive 2004/37/EC of the European Parliament and of the Council (4) (the Carcinogens and Mutagens Directive), is generally considered to give an adequate framework to limit the risks of the substances to the extent needed and shall apply.

Within this framework it is recommended:

| — | to establish at Community level occupational exposure limit values for chromium (VI) compounds according to Directive 98/24/EC (5) or Directive 2004/37/EC as appropriate, |
| --- | --- |

—

to establish at Community level occupational exposure limit values for chromium (VI) compounds according to Directive 98/24/EC (5) or Directive 2004/37/EC as appropriate,

| — | to establish at Community level a biological limit value for chromium (VI) compounds according to Directive 98/24/EC (5). |
| --- | --- |

—

to establish at Community level a biological limit value for chromium (VI) compounds according to Directive 98/24/EC (5).

For CONSUMERS and HUMANS EXPOSED VIA THE ENVIRONMENT

The existing legislative measures for consumer protection and humans exposed via the environment, in particular the provisions of Council Directive 98/8/EC (the Biocidal Products Directive), and the provisions under Council Directive 76/769/EEC (6) as regards substances carcinogenic, mutagenic and toxic for reproduction (CMR), are considered sufficient to address the identified risks to consumers.

For ENVIRONMENT

It is recommended:

| — | to consider including chromium in the revision of the list of priority substances under the Water Framework Directive (Annex X of Directive 2000/60/EC (7)), |
| --- | --- |

—

to consider including chromium in the revision of the list of priority substances under the Water Framework Directive (Annex X of Directive 2000/60/EC (7)),

| — | to consider including limits on the contents of chromium (VI) in sewage sludge and in soils as well as a limit on the annual load in the Directive 86/278/EEC (8) on Sewage Sludge, |
| --- | --- |

—

to consider including limits on the contents of chromium (VI) in sewage sludge and in soils as well as a limit on the annual load in the Directive 86/278/EEC (8) on Sewage Sludge,

| — | to facilitate permitting and monitoring under Directive 2008/1/EC (9) chromium (VI) substances should be included in the ongoing work to develop guidance on ‘Best Available Techniques’ (BAT). |
| --- | --- |

—

to facilitate permitting and monitoring under Directive 2008/1/EC (9) chromium (VI) substances should be included in the ongoing work to develop guidance on ‘Best Available Techniques’ (BAT).

The legislation currently in force at Community level for biocides (Directive 98/8/EC (10)) is considered to give an adequate framework to limit the risks associated with the use of wood preservatives that contain chromium (VI) compounds and the risks associated with the use of wood treated domestically with wood preservatives that contain chromium (VI) compounds.

PART 2

| CAS No: 7789-09-5 | | Einecs No: 232-143-1 |
| --- | --- | --- |
| Molecular formula: | (NH4)2Cr2O7 |
| Einecs name: | Ammonium dichromate |
| IUPAC name: | Ammonium dichromate |
| Rapporteur: | United Kingdom |
| Classification (11): | E; R2
  Carc. Cat. 2; R45
  Muta. Cat. 2; R46
  Repr. Cat. 2; R60-61
  T+; R26
  T; R25-48/23
  C; R34
  Xn; R21
  R42/43
  N; R50-53 |

CAS No: 7789-09-5

Einecs No: 232-143-1

Molecular formula:

(NH4)2Cr2O7

Einecs name:

Ammonium dichromate

IUPAC name:

Ammonium dichromate

Rapporteur:

United Kingdom

Classification (11):

E; R2

Carc. Cat. 2; R45

Muta. Cat. 2; R46

Repr. Cat. 2; R60-61

T+; R26

T; R25-48/23

C; R34

Xn; R21

R42/43

N; R50-53

The risk assessment is based on current practices related to the life-cycle of the five related chromium (VI) substances, chromium trioxide, ammonium dichromate, potassium dichromate, sodium chromate and sodium dichromate, produced in or imported into the European Community as described in the risk assessment forwarded to the Commission by the Member State Rapporteur (2).

The risk assessment has, based on the available information, determined that in the European Community the five chromium (VI) compounds are mainly used as source materials for other chromium (VI) and chromium (III) compounds, in wood preservatives, in metal treatments, in wax and vitamin K manufacture, in pigments and catalysts.

Other uses are as oxidants in dyeing of cotton, in photography, and as a corrosion inhibitor in cooling water and in manufacture of activated carbon.

RISK ASSESSMENT:

A.   Human health

The conclusion of the assessment of the risks to

WORKERS

is that there is a need for specific measures to limit the risks. This conclusion is reached for all exposure scenarios because of:

| — | concerns for respiratory tract sensory irritation, |
| --- | --- |

—

concerns for respiratory tract sensory irritation,

| — | concerns for eye and skin irritation, |
| --- | --- |

—

concerns for eye and skin irritation,

| — | concerns for acute toxicity as a consequence of short-term peak inhalation exposure, |
| --- | --- |

—

concerns for acute toxicity as a consequence of short-term peak inhalation exposure,

| — | concerns for skin sensitisation, |
| --- | --- |

—

concerns for skin sensitisation,

| — | concerns for occupational asthma, |
| --- | --- |

—

concerns for occupational asthma,

| — | concerns for reproductive toxicity (fertility and developmental toxicity) as a consequence of repeated inhalation exposure, |
| --- | --- |

—

concerns for reproductive toxicity (fertility and developmental toxicity) as a consequence of repeated inhalation exposure,

| — | concerns for mutagenicity and carcinogenicity. |
| --- | --- |

—

concerns for mutagenicity and carcinogenicity.

The substance has not been sufficiently tested for effects to the respiratory tract and to the kidney as a consequence of repeated inhalation exposure to the chromium (VI) compounds, specifically to identify the NOAELs and dose-response characteristics. However, as the substance has been identified as a non-threshold carcinogen, it normally requires control measures that would not be influenced by further information.

The conclusion of the assessment of the risks to

CONSUMERS

is that there is a need for specific measures to limit the risks. This conclusion is reached because of:

| — | concerns for mutagenicity and carcinogenicity as a consequence of dermal exposure arising from handling of dry copper chrome arsenate (CCA)-treated wood, both for adults and for children exposed via wooden playing structures because no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures. |
| --- | --- |

—

concerns for mutagenicity and carcinogenicity as a consequence of dermal exposure arising from handling of dry copper chrome arsenate (CCA)-treated wood, both for adults and for children exposed via wooden playing structures because no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures.

No formal risk characterisation has been conducted for consumer exposure to wet CCA treated wood. In the UK the supply of wood not fully dried following CCA treatment is prohibited as a condition of approval under the Control of Pesticides Regulations (1986). Similar controls may already exist in all other Member States. However, if specific controls are not available in each Member State, then there would be concerns for all relevant human health endpoints.

The conclusion of the assessment of the risks to

HUMANS EXPOSED VIA THE ENVIRONMENT

is that there is a need for specific measures to limit the risks. This conclusion is reached because:

| — | for mutagenicity and carcinogenicity no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures. |
| --- | --- |

—

for mutagenicity and carcinogenicity no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures.

The conclusion of the assessment of the risks to

HUMAN HEALTH (physico-chemical properties)

is that there is at present no need for further information and/or testing or for risk reduction measures beyond those which are being applied. This conclusion is reached because:

| — | the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient. |
| --- | --- |

—

the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient.

B.   Environment

The conclusion of the assessment of the risks to the

ATMOSPHERE

is that there is at present no need for further information and/or testing or for risk reduction measures beyond those which are being applied. This conclusion is reached because:

| — | the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient. |
| --- | --- |

—

the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient.

The conclusion of the assessment of the risks to the environment for

AQUATIC ECOSYSTEM AND TERRESTRIAL ECOSYSTEM

| 1. | is that there is a need for further information and/or testing. This conclusion is reached because of:






  — | concerns for effects on the sediment compartment as a consequence of exposure arising from production, pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- | --- |

1.

is that there is a need for further information and/or testing. This conclusion is reached because of:

—

concerns for effects on the sediment compartment as a consequence of exposure arising from production, pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation and metal treatment.

The information and/or testing requirements are:

| — | toxicity testing on sediment organisms. |
| --- | --- |

—

toxicity testing on sediment organisms.

However, the implementation of the strategy for limiting risks for the environment together with the corresponding Recommendation 2008/455/EC (3), is expected to eliminate the need for further information requirements,

| — | concerns for non-compartment specific effects as a consequence of indirect exposure of predators through the mussel-based food chain arising from pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- |

—

concerns for non-compartment specific effects as a consequence of indirect exposure of predators through the mussel-based food chain arising from pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment.

The information and/or testing requirements are:

| — | further investigation of the uptake of chromium into organisms other than fish, characterisation of the nature of the chromium in organisms and consideration of the toxicity of chromium in other forms to organisms consuming prey containing chromium. |
| --- | --- |

—

further investigation of the uptake of chromium into organisms other than fish, characterisation of the nature of the chromium in organisms and consideration of the toxicity of chromium in other forms to organisms consuming prey containing chromium.

However, the implementation of the strategy for limiting the risks for the environment together with the corresponding Recommendation 2008/455/EC, is expected to eliminate the need for further information requirements;

| 2. | is that there is a need for specific measures to limit the risks. This conclusion is reached because of:






  — | concerns for effects on the aquatic and terrestrial environment as a consequence of exposure arising from production (aquatic only, one site), pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- | --- |

2.

is that there is a need for specific measures to limit the risks. This conclusion is reached because of:

—

concerns for effects on the aquatic and terrestrial environment as a consequence of exposure arising from production (aquatic only, one site), pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation and metal treatment.

The conclusion of the assessment of the risks to

MICRO-ORGANISMS IN THE SEWAGE TREATMENT PLANT

is that there is a need for specific measures to limit the risks. This conclusion is reached because of:

| — | concerns for effects on the functioning of waste water treatment plants due to pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- |

—

concerns for effects on the functioning of waste water treatment plants due to pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment.

STRATEGY FOR LIMITING RISKS

For WORKERS

The legislation for workers' protection currently in force at Community level, particularly Directive 2004/37/EC (the Carcinogens and Mutagens Directive), is generally considered to give an adequate framework to limit the risks of the substances to the extent needed and shall apply.

Within this framework it is recommended:

| — | to establish at Community level occupational exposure limit values for chromium (VI) compounds according to Directive 98/24/EC or Directive 2004/37/EC as appropriate, |
| --- | --- |

—

to establish at Community level occupational exposure limit values for chromium (VI) compounds according to Directive 98/24/EC or Directive 2004/37/EC as appropriate,

| — | to establish at Community level a biological limit value for chromium (VI) compounds according to Directive 98/24/EC. |
| --- | --- |

—

to establish at Community level a biological limit value for chromium (VI) compounds according to Directive 98/24/EC.

For CONSUMERS and HUMANS EXPOSED VIA THE ENVIRONMENT

The existing legislative measures for consumer protection and humans exposed via the environment, in particular the provisions of Directive 98/8/EC (the Biocidal Products Directive), and the provisions under Directive 76/769/EEC as regards CMR substances, are considered sufficient to address the identified risks to consumers.

For ENVIRONMENT

It is recommended:

| — | to consider including of the chromium (VI) compounds in the revision of the list of priority substances under the Water Framework Directive (Annex X of Directive 2000/60/EC), |
| --- | --- |

—

to consider including of the chromium (VI) compounds in the revision of the list of priority substances under the Water Framework Directive (Annex X of Directive 2000/60/EC),

| — | to consider including limits on the contents of chromium (VI) compounds in sewage sludge and in soils as well as a limit on the annual load in the Directive 86/278/EEC on Sewage Sludge, |
| --- | --- |

—

to consider including limits on the contents of chromium (VI) compounds in sewage sludge and in soils as well as a limit on the annual load in the Directive 86/278/EEC on Sewage Sludge,

| — | to facilitate permitting and monitoring under Directive 2008/1/EC chromium (VI) substances should be included in the ongoing work to develop guidance on ‘Best Available Techniques’ (BAT). |
| --- | --- |

—

to facilitate permitting and monitoring under Directive 2008/1/EC chromium (VI) substances should be included in the ongoing work to develop guidance on ‘Best Available Techniques’ (BAT).

The legislation currently in force at Community level for biocides (Directive 98/8/EC (10)) is considered to give an adequate framework to limit the risks associated with the use of wood preservatives that contain chromium (VI) compounds and the risks associated with the use of wood treated domestically with wood preservatives that contain chromium (VI) compounds.

PART 3

| CAS No: 7778-50-9 | | Einecs No: 231-906-6 |
| --- | --- | --- |
| Molecular formula: | K2Cr2O7 |
| Einecs name: | Potassium dichromate |
| IUPAC name: | Potassium dichromate |
| Rapporteur: | United Kingdom |
| Classification (12): | O; R8
  Carc. Cat. 2; R45
  Muta. Cat. 2; R46
  Repr. Cat. 2; R60-61
  T+; R26
  T; R25-48/23
  C; R34
  Xn; R21
  R42/43
  N; R50-53 |

CAS No: 7778-50-9

Einecs No: 231-906-6

Molecular formula:

K2Cr2O7

Einecs name:

Potassium dichromate

IUPAC name:

Potassium dichromate

Rapporteur:

United Kingdom

Classification (12):

O; R8

Carc. Cat. 2; R45

Muta. Cat. 2; R46

Repr. Cat. 2; R60-61

T+; R26

T; R25-48/23

C; R34

Xn; R21

R42/43

N; R50-53

The risk assessment is based on current practices related to the life-cycle of the five related chromium (VI) substances, chromium trioxide, ammonium dichromate, potassium dichromate, sodium chromate and sodium dichromate, produced in or imported into the European Community as described in the risk assessment forwarded to the Commission by the Member State Rapporteur (2).

The risk assessment has, based on the available information, determined that in the European Community the five chromium (VI) compounds are mainly used as source materials for other chromium (VI) and chromium (III) compounds, in wood preservatives, in metal treatments, in wax and vitamin K manufacture, in pigments and catalysts.

Other uses are as oxidants in dyeing of cotton, in photography, and as a corrosion inhibitor in cooling water and in manufacture of activated carbon.

RISK ASSESSMENT:

A.   Human health

The conclusion of the assessment of the risks to

WORKERS

is that there is a need for specific measures to limit the risks. This conclusion is reached for all exposure scenarios because:

| — | concerns for respiratory tract sensory irritation, |
| --- | --- |

—

concerns for respiratory tract sensory irritation,

| — | concerns for eye and skin irritation, |
| --- | --- |

—

concerns for eye and skin irritation,

| — | concerns for acute toxicity as a consequence of short-term peak inhalation exposure, |
| --- | --- |

—

concerns for acute toxicity as a consequence of short-term peak inhalation exposure,

| — | concerns for skin sensitisation, |
| --- | --- |

—

concerns for skin sensitisation,

| — | concerns for occupational asthma, |
| --- | --- |

—

concerns for occupational asthma,

| — | concerns for reproductive toxicity (fertility and developmental toxicity) as a consequence of repeated inhalation exposure, |
| --- | --- |

—

concerns for reproductive toxicity (fertility and developmental toxicity) as a consequence of repeated inhalation exposure,

| — | concerns for mutagenicity and carcinogenicity. |
| --- | --- |

—

concerns for mutagenicity and carcinogenicity.

The substance has not been sufficiently tested for effects to the respiratory tract and to the kidney as a consequence of repeated inhalation exposure to chromium (VI) compounds, specifically to identify the NOAELs and dose-response characteristics. However, as the substance has been identified as a non-threshold carcinogen, it normally requires control measures that would not be influenced by further information.

The conclusion of the assessment of the risks to

CONSUMERS

is that there is a need for specific measures to limit the risks. This conclusion is reached because of:

| — | concerns for mutagenicity and carcinogenicity as a consequence of dermal exposure arising from handling of dry copper chrome arsenate (CCA)-treated wood, both for adults and for children exposed via wooden playing structures because no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures. |
| --- | --- |

—

concerns for mutagenicity and carcinogenicity as a consequence of dermal exposure arising from handling of dry copper chrome arsenate (CCA)-treated wood, both for adults and for children exposed via wooden playing structures because no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures.

No formal risk characterisation has been conducted for consumer exposure to wet CCA treated wood. In the UK the supply of wood not fully dried following CCA treatment is prohibited as a condition of approval under the Control of Pesticides Regulations (1986). Similar controls may already exist in all other Member States. However, if specific controls are not available in each Member State, then there would be concerns for all relevant human health endpoints.

The conclusion of the assessment of the risks to

HUMANS EXPOSED VIA THE ENVIRONMENT

is that there is a need for specific measures to limit the risks. This conclusion is reached because:

| — | for mutagenicity and carcinogenicity no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures. |
| --- | --- |

—

for mutagenicity and carcinogenicity no threshold below which there would be no risk to human health can be identified for these endpoints. However, the risk assessment indicates that risks are already low. This should be taken into account when considering the adequacy of existing controls and the feasibility and practicability of further specific risk reduction measures.

The conclusion of the assessment of the risks to

HUMAN HEALTH (physico-chemical properties)

is that there is at present no need for further information and/or testing or for risk reduction measures beyond those which are being applied. This conclusion is reached because:

| — | the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient. |
| --- | --- |

—

the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient.

B.   Environment

The conclusion of the assessment of the risks to the

ATMOSPHERE

is that there is at present no need for further information and/or testing or for risk reduction measures beyond those which are being applied. This conclusion is reached because:

| — | the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient. |
| --- | --- |

—

the risk assessment shows that risks are not expected. Risk reduction measures already being applied are considered sufficient.

The conclusion of the assessment of the risks to the environment for

AQUATIC ECOSYSTEM AND TERRESTRIAL ECOSYSTEM

| 1. | is that there is a need for further information and/or testing. This conclusion is reached because of:






  — | concerns for effects on the sediment compartment as a consequence of exposure arising from production, pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- | --- |

1.

is that there is a need for further information and/or testing. This conclusion is reached because of:

—

concerns for effects on the sediment compartment as a consequence of exposure arising from production, pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation and metal treatment.

The information and/or testing requirements are:

| — | toxicity testing on sediment organisms. |
| --- | --- |

—

toxicity testing on sediment organisms.

However, the implementation of the strategy for limiting risks for the environment together with the corresponding Recommendation 2008/455/EC (3), is expected to eliminate the need for further information requirements,

| — | concerns for non-compartment specific effects as a consequence of indirect exposure of predators through the mussel-based food chain arising from pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation, and metal treatment. |
| --- | --- |

—

concerns for non-compartment specific effects as a consequence of indirect exposure of predators through the mussel-based food chain arising from pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation, and metal treatment.

The information and/or testing requirements are:

| — | further investigation of the uptake of chromium into organisms other than fish, characterisation of the nature of the chromium in organisms and consideration of the toxicity of chromium in other forms to organisms consuming prey containing chromium. |
| --- | --- |

—

further investigation of the uptake of chromium into organisms other than fish, characterisation of the nature of the chromium in organisms and consideration of the toxicity of chromium in other forms to organisms consuming prey containing chromium.

However, the implementation of the strategy for limiting the risks for the environment together with the corresponding Recommendation 2008/455/EC, is expected to eliminate the need for further information requirements;

| 2. | is that there is a need for specific measures to limit the risks. This conclusion is reached because:






  — | concerns for effects on the aquatic and terrestrial environment as a consequence of exposure arising from production (aquatic only, one site), pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation, and metal treatment. |
| --- | --- | --- |

2.

is that there is a need for specific measures to limit the risks. This conclusion is reached because:

—

concerns for effects on the aquatic and terrestrial environment as a consequence of exposure arising from production (aquatic only, one site), pigment production, chromium oxide production, tanning salts, wood preservative formulation, wood preservative applications, treated wood in use, metal treatment formulation, and metal treatment.

The conclusion of the assessment of the risks to

MICRO-ORGANISMS IN THE SEWAGE TREATMENT PLANT

is that there is a need for specific measures to limit the risks. This conclusion is reached because of:

| — | concerns for effects on the functioning of waste water treatment plants due to pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment. |
| --- | --- |

—

concerns for effects on the functioning of waste water treatment plants due to pigment production, chromium oxide production, tanning salts, wood preservative formulation, treated wood in use, metal treatment formulation and metal treatment.

STRATEGY FOR LIMITING RISKS

For WORKERS

The legislation for workers' protection currently in force at Community level, particularly Directive 2004/37/EC (the Carcinogens and Mutagens Directive), is generally considered to give an adequate framework to limit the risks of the substances to the extent needed and shall apply.

Within this framework it is recommended:

| — | to establish at Community level occupational exposure limit values for chromium (VI) compounds according to Directive 98/24/EC or Directive 2004/37/EC as appropriate, |
| --- | --- |

—

to establish at Community level occupational exposure limit values for chromium (VI) compounds according to Directive 98/24/EC or Directive 2004/37/EC as appropriate,

| — | to establish at Community level a biological limit value for chromium (VI) compounds according to Directive 98/24/EC. |
| --- | --- |

—

to establish at Community level a biological limit value for chromium (VI) compounds according to Directive 98/24/EC.

For CONSUMERS and HUMANS EXPOSED VIA THE ENVIRONMENT

The existing legislative measures for consumer protection and humans exposed via the environment, in particular the provisions of Directive 98/8/EC (the Biocidal Products Directive), and the provisions under Directive 76/769/EEC as regards CMR substances, are considered sufficient to address the identified risks to consumers.

For ENVIRONMENT

It is recommended:

| — | to consider including chromium (VI) compounds in the revision of the list of priority substances under the Water Framework Directive (Annex X of Directive 2000/60/EC), |
| --- | --- |

—

to consider including chromium (VI) compounds in the revision of the list of priority substances under the Water Framework Directive (Annex X of Directive 2000/60/EC),

| — | to consider including limits on the contents of chromium (VI) compounds in sewage sludge and in soils as well as a limit on the annual load in the Directive 86/278/EEC on Sewage Sludge, |
| --- | --- |

—

to consider including limits on the contents of chromium (VI) compounds in sewage sludge and in soils as well as a limit on the annual load in the Directive 86/278/EEC on Sewage Sludge,

| — | to facilitate permitting and monitoring under Directive 2008/1/EC chromium (VI) compounds should be included in the ongoing work to develop guidance on ‘Best Available Techniques’ (BAT). |
| --- | --- |

—

to facilitate permitting and monitoring under Directive 2008/1/EC chromium (VI) compounds should be included in the ongoing work to develop guidance on ‘Best Available Techniques’ (BAT).

The legislation currently in force at Community level for biocides (Directive 98/8/EC (10)) is considered to give an adequate framework to limit the risks associated with the use of wood preservatives that contain chromium (VI) compounds and the risks associated with the use of wood treated domestically with wood preservatives that contain chromium (VI) compounds.

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(1)  The classification of the substance is established by Commission Directive 2004/73/EC of 29 April 2004 adapting to technical progress for the 29th time Council Directive 67/548/EEC on the approximation of the laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (OJ L 152, 30.4.2004, p. 1, amended by OJ L 216, 16.6.2004, p. 125).

(2)  The comprehensive Risk Assessment Report, as well as a summary thereof, can be found on the Internet site of the European Chemicals Bureau:

http://ecb.jrc.it/existing-substances/

(3)  OJ L 158, 18.6.2008.

(4)  OJ L 158, 30.4.2004, p. 50.

(5)  OJ L 131, 5.5.1998, p. 11.

(6)  OJ L 262, 27.9.1976, p. 201.

(7)  OJ L 327, 22.12.2000, p. 1.

(8)  OJ L 191, 15.7.1986, p. 23.

(9)  OJ L 24, 29.1.2008, p. 8.

(10)  OJ L 123, 24.4.1998, p. 1.

(11)  The classification of the substance is established by Commission Directive 2004/73/EC of 29 April 2004 adapting to technical progress for the 29th time Council Directive 67/548/EEC on the approximation of the laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (OJ L 152, 30.4.2004, p. 1, amended by OJ L 216, 16.6.2004, p. 125).

(12)  The classification of the substance is established by Commission Directive 2004/73/EC of 29 April 2004 adapting to technical progress for the 29th time Council Directive 67/548/EEC on the approximation of the laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (OJ L 152, 30.4.2004, p. 1, amended by OJ L 216, 16.6.2004, p. 125).

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