2.

Part 2 is amended as follows: (a) In section 2.1.1.1, point (c) is replaced by the following: ‘(c) substances, mixtures and articles not mentioned in points (a) and (b) above, which are manufactured with the view to producing a practical explosive or pyrotechnic effect.’ (b) In section 2.1.2.2, point (f) is replaced by the following: ‘(f) Division 1.6 Extremely insensitive articles which do not have a mass explosion hazard: — articles which predominantly contain extremely insensitive substances or mixtures; — and which demonstrate a negligible probability of accidental initiation or propagation.’ (c) In section 2.1.4.1, the third paragraph is replaced by the following: ‘Some explosive substances and mixtures are wetted with water or alcohols, diluted with other substances or dissolved or suspended in water or other liquid substances to suppress or reduce their explosives properties. They may be a candidate for classification as desensitised explosives (see Section 2.17).’ (d) In section 2.1.4.1, figure 2.1.3 is replaced by the following: ‘Figure 2.1.3 Procedure for assignment to a division in the class of explosives (Class 1 for transport) DIVISION 1.1 DIVISION 1.2 DIVISION 1.3 DIVISION 1.5 DIVISION 1.6 NOT AN EXPLOSIVE Is the major hazard that from dangerous projections? Is the result a mass explosion? Is the substance/mixture a candidate for Divison 1.5? Would the hazard hinder firefighting in the immediate vicinity? Is the major hazard radiant heat and/or violent burning but with no dangerous blast or projection hazard? Is it an extremely insensitive article? Is the article a candidate for Division 1.6? Is it a very insensitive explosive substance/mixture with a mass explosion hazard? Is the substance/mixture or article manufactured with the view of producing a practical explosive or pyrotechnic effect? Are there hazardous effects outside the package? Is the product article excluded by definition? (se 2.1.1.1 (b)) Package the substance/mixture Does special provision 347 apply? (1) DIVISION 1.4 Compatibility groups other than S DIVISION 1.4 Compatibility group S TEST SERIES 5 TEST SERIES 6 ARTICLE OR SUBSTANCE/MIXTURES PROVISIONALLY ACCEPTED IN THIS CLASS (from figure 2.1.2) TEST SERIES 7 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No No No No No No No (1) See Chapter 3.3 of the UN RTDG, Model Regulations for details .’ (e) Section 2.1.4.3 is amended as follows: (i) the introductory wording is replaced by the following: ‘2.1.4.3. The acceptance procedure for the hazard class “explosives” need not be applied if:’ (ii) point (c) is replaced by the following: ‘(c) For an organic substance, or a homogenous mixture of organic substances, containing a chemical group (or groups) associated with explosive properties: — the exothermic decomposition energy is less than 500 J/g, or — the onset of exothermic decomposition is 500 °C or above as indicated in Table 2.1.3.’ (iii) Table 2.1.3 is added to 2.1.4.3 (c): ‘Table 2.1.3 Decision to apply the acceptance procedure for the hazard class “Explosives” for an organic substance or a homogenous mixture of organic substances Decomposition energy (J/g) Decomposition onset temperature (°C) Apply acceptance procedure? (Yes/No) < 500 < 500 No < 500 ≥ 500 No ≥ 500 < 500 Yes ≥ 500 ≥ 500 No The exothermic decomposition energy may be determined using a suitable calorimetric technique (see section 20.3.3.3 of the UN RTDG, Manual of Tests and Criteria).’ (f) In section 2.2 the title is replaced by the following: ‘2.2. Flammable gases’ (g) Section 2.2.1 is replaced by the following: ‘2.2.1. Definitions 2.2.1.1. Flammable gas means a gas or gas mixture having a flammable range with air at 20 °C and a standard pressure of 101,3 kPa. 2.2.1.2. A pyrophoric gas means a flammable gas that is liable to ignite spontaneously in air at a temperature of 54 °C or below. 2.2.1.3. A chemically unstable gas means a flammable gas that is able to react explosively even in the absence of air or oxygen.’ (h) Sections 2.2.2.1 and 2.2.2.2 are replaced by the following: ‘2.2.2.1. A flammable gas is classified in Category 1A, 1B or 2 in accordance with Table 2.2.1. Flammable gases that are pyrophoric and/or chemically unstable are always classified in Category 1A. Table 2.2.1 Criteria for categorisation of flammable gases Category Criteria 1A Flammable gas Gases, which at 20 °C and a standard pressure of 101,3 kPa are: (a) ignitable when in a mixture of 13 % or less by volume in air; or (b) have a flammable range with air of at least 12 percentage points regardless of the lower flammability limit unless data show they meet the criteria for Category 1B Pyrophoric gas Flammable gases that ignite spontaneously in air at a temperature of 54 °C or below Chemically unstable gas A Flammable gases which are chemically unstable at 20 °C and a standard pressure of 101,3 kPa B Flammable gases which are chemically unstable at a temperature greater than 20 °C and/or a pressure greater than 101,3 kPa 1B Flammable gas Gases which meet the flammability criteria for Category 1A, but which are not pyrophoric, nor chemically unstable, and which have at least either: (a) a lower flammability limit of more than 6 % by volume in air; or (b) a fundamental burning velocity of less than 10 cm/s; 2 Flammable gas Gases, other than those of Category 1A or 1B, which, at 20 °C and a standard pressure of 101,3 kPa, have a flammable range while mixed in air. NOTE 1: Aerosols shall not be classified as flammable gases. See Section 2.3. NOTE 2: In the absence of data allowing classification into Category 1B, a flammable gas that meets the criteria for Category 1A is classified by default in Category 1A. NOTE 3: Spontaneous ignition for pyrophoric gases is not always immediate, and there may be a delay. NOTE 4: In the absence of data on its pyrophoricity, a flammable gas mixture shall be classified as a pyrophoric gas if it contains more than 1 % (by volume) of pyrophoric component(s) .’ (i) In section 2.2.3, Table 2.2.3 is replaced by the following: ‘Table 2.2.2 Label elements for flammable gases Category 1A Gases categorised as 1A meeting pyrophoric or unstable gas A/B criteria Category 1B Category 2 Pyrophoric gas Chemically unstable gas Category A Category B GHS Pictogram No pictogram Signal Word Danger Danger Danger Danger Danger Warning Hazard Statement H220: Extremely flammable gas H220: Extremely flammable gas. H232: May ignite spontaneously if exposed to air H220: Extremely flammable gas. H230: May react explosively even in the absence of air H220: Extremely flammable gas. H231: May react explosively even in the absence of air at elevated pressure and/or temperature H221: Flammable gas H221: Flammable gas Precautionary Statement Prevention P210 P210 P222 P280 P202 P210 P202 P210 P210 P210 Precautionary Statement Response P377 P381 P377 P381 P377 P381 P377 P381 P377 P381 P377 P381 Precautionary Statement Storage P403 P403 P403 P403 P403 P403 Precautionary Statement Disposal The classification procedure is set out in the following decision logic (see Figure 2.2.1).’ (j) In section 2.2.3, the following paragraph is added after Table 2.2.2: ‘If a flammable gas or gas mixture is classified as pyrophoric and/or chemically unstable, then all relevant classification(s) shall be communicated on the safety data sheet as specified in Annex II of Regulation (EC) No 1907/2006, and the relevant hazard communication elements included on the label.’ (k) In section 2.2.3, Figure 2.2.1 is replaced with the following: ‘Figure 2.2.1 Flammable gases Category 1A Chemically unstable gas A Category 1A Pyrophoric gas Category 1A Pyrophoric gas and chemically unstable gas B Danger Danger Danger Danger Category 1A Pyrophoric gas and chemically unstable gas A Is it chemically unstable at 20 °C and a standard pressure of 101,3 kPa? Is it chemically unstable at a temperature greater than 20 °C and/or a pressure greater than 101,3 kPa? Is it chemically unstable at 20 °C and a standard pressure of 101,3 kPa? Does it ignite spontaneously in air at 54 °C or below? (1) Not classified as a flammable gas Does it have a flammable range with air at 20 °C and a standard pressure of 101,3 kPa? Yes No No No Yes Yes No No Yes Yes The substance/mixure is a gas (1) In the absence of data on its pyrophoricity, a flammable gas mixture shall be classified as a pyrophoric gas if it contains more than 1 % (by volume) of pyrophoric component(s). Category 2 No pictogram Warning Does it have a lower flammability limit > 6 % by volume in air, and/or does it have a fundamental burning velocity < 10 cm/s? At 20 °C and a standard pressure of 101,3 kPa, does it: (a) ignite when a mixture of 13 % or less by volume in air?; or (b) have a flammable range with air of at least 12 percentage poins regardless of the lower flammability limit? Is it chemically unstable at a temperature greater than 20 °C and/or a pressure greater than 101,3 kPa? No or unknown Yes Yes Yes No No Category 1B Category 1A Danger Danger Danger Category 1A Chemically unstable gas B ’ (l) In section 2.2.3, Figure 2.2.2 is deleted. (m) Section 2.2.4 is amended as follows: Section 2.2.4.1 is replaced by the following: ‘2.2.4.1. Flammability shall be determined by tests or, for mixtures where there are sufficient data available, by calculation in accordance with the methods adopted by ISO (see ISO 10156 as amended, “Gases and gas mixtures — Determination of fire potential and oxidising ability for the selection of cylinder valve outlets” and, if using fundamental burning velocity for Category 1B, see ISO 817 as amended “Refrigerants-Designation and safety classification, Annex C:- Method of test for burning velocity measurement of flammable gases”). Instead of the test apparatus according to ISO 10156 as amended, the test apparatus for the tube method according to clause 4.2 of EN 1839 as amended (Determination of explosion limits of gases and vapours) may be used.’ The following sections 2.2.4.2 and 2.2.4.3 are inserted: ‘2.2.4.2. Pyrophoricity shall be determined at 54 °C in accordance with either IEC 60079-20-1 ed1.0 (2010-01) “Explosive atmospheres – Part 20-1: Material characteristics for gas and vapour classification – Test methods and data” or DIN 51794 “Determining the ignition temperature of petroleum products”. 2.2.4.3. The classification procedure for pyrophoric gases need not be applied when experience in production or handling shows that the substance does not ignite spontaneously on coming into contact with air at a temperature of 54 °C or below. Flammable gas mixtures, which have not been tested for pyrophoricity and contain more than one percent pyrophoric components, shall be classified as a pyrophoric gas. Expert judgement on the properties and physical hazards of pyrophoric gases and their mixtures shall be used in assessing the need for classification of flammable gas mixtures containing one percent or less pyrophoric components. In this case, testing need only be considered if expert judgement indicates a need for additional data to support the classification process.’ (n) Section 2.2.4.2 is renumbered as follows: ‘2.2.4.4.’ (o) The text before paragraphs (a) to (d) in section 2.6.4.2 is replaced by the following: ‘2.6.4.2. In the case of mixtures ( 5 ) containing known flammable liquids in defined concentrations, although they may contain non-volatile components e.g. polymers, additives, the flash point need not be determined experimentally if the calculated flash point of the mixture, using the method given in 2.6.4.3 below, is at least 5 °C ( 6 ) greater than the relevant classification criterion and provided that: (5) Up to now, the calculation method is validated for mixtures containing up to six volatile components. These components may be flammable liquids like hydrocarbons, ethers, alcohols, esters (except acrylates), and water. It is however not yet validated for mixtures containing halogenated, sulphurous, and/or phosphoric compounds as well as reactive acrylates." (6) If the calculated flash point is less than 5 °C greater than the relevant classification criterion, the calculation method may not be used and the flash point shall be determined experimentally.’" (p) Section 2.7.2.2 is replaced by the following: ‘2.7.2.2. Powders of metals or metal alloys shall be classified as flammable solids when they can be ignited and the reaction spreads over the whole length of the sample (100 mm) in 10 min or less.’ (q) In section 2.12.2.1, Table 2.12.1 is replaced by the following: ‘Table 2.12.1 Criteria for substances and mixtures, which in contact with water, emit flammable gases Category Criteria 1 Any substance or mixture which reacts vigorously with water at ambient temperatures and demonstrates generally a tendency for the gas produced to ignite spontaneously, or which reacts readily with water at ambient temperatures such that the rate of evolution of flammable gas is equal to or greater than 10 litres per kilogram of substance over any one minute. 2 Any substance or mixture which reacts readily with water at ambient temperatures such that the maximum rate of evolution of flammable gas is equal to or greater than 20 litres per kilogram of substance per hour, and which does not meet the criteria for Category 1. 3 Any substance or mixture which reacts slowly with water at ambient temperatures such that the maximum rate of evolution of flammable gas is greater than 1 litre per kilogram of substance per hour, and which does not meet the criteria for Categories 1 and 2. Note: The test shall be performed on the substance or mixture in its physical form as presented. If, for example, for the purposes of supply or transport, the same chemical is to be presented in a physical form different from that which was tested and which is considered likely to materially alter its performance in a classification test, the substance must also be tested in the new form.’ (r) The following section 2.17 is added: ‘2.17. Desensitised explosives 2.17.1. Definitions and general considerations 2.17.1.1. Desensitised explosives are solid or liquid explosive substances or mixtures which are phlegmatised to suppress their explosive properties in such a manner that they do not mass explode and do not burn too rapidly and therefore may be exempted from the hazard class “Explosives” (see also paragraph 3 in section 2.1.4.1) (7) 2.17.1.2. The hazard class of desensitised explosives comprises: (a) Solid desensitised explosives: explosive substances or mixtures, which are wetted with water or alcohols or are diluted with other substances, to form a homogeneous solid mixture to suppress their explosive properties. NOTE: This includes desensitisation achieved by formation of hydrates of the substances. (b) Liquid desensitised explosives: explosive substances or mixtures, which are dissolved or suspended in water or other liquid substances, to form a homogeneous liquid mixture to suppress their explosive properties. 2.17.2. Classification criteria 2.17.2.1. Any explosive while in a desensitised state shall be considered in this class unless, in that state: (a) It is intended to produce a practical explosive or pyrotechnic effect; (b) It has a mass explosion hazard according to test series 6 (a) or 6 (b) or the corrected burning rate according to the burning rate test described in part V, subsection 51.4 of the UN RTDG, Manual of Tests and Criteria is greater than 1 200 kg/min; or (c) The exothermic decomposition energy is less than 300 J/g. NOTE 1: Substances or mixtures, which meet the criterion (a) or (b) in their desensitised state shall be classified as explosives (see Section 2.1). Substances or mixtures which meet the criterion (c) may fall within the scope of other physical hazard classes. NOTE 2: The exothermic decomposition energy may be estimated using a suitable calorimetric technique (see section 20, sub-section 20.3.3.3 in Part II of the UN RTDG, Manual of Tests and Criteria). 2.17.2.2. Desensitised explosives shall be classified and packaged for supply and use in one of the four categories of this class depending on the corrected burning rate (Ac) using the test “burning rate test (external fire)” described in Part V, sub-section 51.4 of the UN RTDG, Manual of Tests and Criteria, according to Table 2.17.1: Table 2.17.1. Criteria for desensitised explosives Category Criteria 1 Desensitised explosives with a corrected burning rate (AC) equal to or greater than 300 kg/min but not more than 1 200 kg/min 2 Desensitised explosives with a corrected burning rate (AC) equal to or greater than 140 kg/min but less than 300 kg/min 3 Desensitised explosives with a corrected burning rate (AC) equal to or greater than 60 kg/min but less than 140 kg/min 4 Desensitised explosives with a corrected burning rate (AC) less than 60 kg/min Note 1: Desensitised explosives shall be prepared so that they remain homogeneous and do not separate during normal storage and handling, particularly if desensitised by wetting. The manufacturer/supplier shall give information in the safety data sheet about the shelf-life and instructions on verifying desensitisation. Under certain conditions the content of desensitising agent (e.g. phlegmatiser, wetting agent or treatment) may decrease during supply and use, and thus, the hazard potential of the desensitised explosive may increase. In addition, the safety data sheet shall include advice on avoiding increased fire, blast or projection hazards when the substance or mixture is not sufficiently desensitised. Note 2: Explosive properties of desensitised explosives shall be determined by test series 2 of the UN RTDG, Manual of Tests and Criteria, and shall be communicated in the safety data sheet. Note 3: For the purposes of storage, supply and use, desensitised explosives do not fall additionally within the scope of Sections 2.1 (explosives), 2.6 (flammable liquids) and 2.7 (flammable solids). 2.17.3. Hazard communication Label elements shall be used for liquid or solid substances or mixtures meeting the criteria for classification in this hazard class in accordance with Table 2.17.2. Table 2.17.2. Label elements for desensitised explosives Category 1 Category 2 Category 3 Category 4 GHS Pictogram Signal word Danger Danger Warning Warning Hazard statement H206 Fire, blast or projection hazard; increased risk of explosion if desensitising agent is reduced H207 Fire or projection hazard; increased risk of explosion if desensitising agent is reduced H207 Fire or projection hazard; increased risk of explosion if desensitising agent is reduced H208: Fire hazard; increased risk of explosion if desensitising agent is reduced Precautionary statement Prevention P210 P212 P230 P233 P280 P210 P212 P230 P233 P280 P210 P212 P230 P233 P280 P210 P212 P230 P233 P280 Precautionary Statement Response P370 + P380+ P375 P370 + P380+ P375 P370 + P380+ P375 P371 + P380 + P375 Precautionary Statement Storage P401 P401 P401 P401 Precautionary Statement Disposal P501 P501 P501 P501 2.17.4. Additional classification considerations Figure 2.17.1. Desensitised explosives No Explosive Division 1.1 Explosive Division 1.1 Hazard class “Explosives” (see criteria in Section 2.1) Yes No Not classified as a desensitised explosive May fall within the scope of other physical hazard classes Yes Yes Danger Danger Yes Is the result a mass explosion? Test 6(a), 6(b) Is the exothermic decomposition energy less than 300 J/g? Does it contain an explosive substance or mixture which is phlegmatised to suppress the explosive properties? The substance/mixture is a solid or liquid? No Yes No AC > 1 200 kg/min? Is the result a mass explosion? Burning rate test (Part V, sub-section 51.4) AC ≥ 60 kg/min but < 140 kg/min Category 4 Category 3 Category 2 AC < 60 kg/min Warning Yes No AC ≥ 140 kg/min but < 300 kg/min No Warning Danger Danger Category 1 Yes Yes Yes AC ≥ 300 kg/min but < 1 200 kg/min No No 2.17.4.1. The classification procedure for desensitised explosives does not apply if: (a) The substances or mixtures contain no explosives according to the criteria in Section 2.1; or (b) The exothermic decomposition energy is less than 300 J/g. 2.17.4.2. The exothermic decomposition energy shall be determined using the explosive already desensitised (i.e.: the homogenous solid or liquids mixture formed by the explosive and the substance(s) used to suppress its explosive properties). The exothermic decomposition energy may be estimated using a suitable calorimetric technique (see Section 20, sub-section 20.3.3.3 in Part II of the UN RTDG, Manual of Tests and Criteria).’