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Safety Data Sheet（SDS）
Date of Issue:
Date Revised:

1st May, 2005
3rd April, 2023

1. dentification of the Substance and of the Company
Product Identifier:Cemented Carbide (include the coated or surface treated Cemented Carbide)
Supplier Information:
Company Name:NTK CUTTING TOOLS .CO., LTD.
Address:
2808 Iwasaki, Komaki-shi, Aichi, Japan <485-8510>
Telephone Number:+81-568-76-1270
FAX Number:+81-568-76-1288
Emergency Telephone： +81-568-76-1270
Recommended Use of the Cemented Carbide
Cutting and drilling tools for metallic materials
Restrictions on Use of the Cemented Carbide
Do not use for other than the specified purpose
Attention to the Phase/State of the Cemented Carbide
・Cemented Carbide as solid state like cutting tools is chemically stable and safe at
explosive, flammable, combustible, pyrophoric, water-reactive, and oxidizability undernormal environment.
・Cemented Carbide is safe for use as the cutting tools (grinding, machining, rolling formetals) under normal condition.
・This SDS informs about the dust, fume or vapor which occur from Cemented Carbide
producing process such as raw material powder handling and grinding.
2. Hazard Identification
The GHS Classification
Some data (such as the burning rate test data, etc.) for the dust, fume or vapor which
occur from Cemented Carbide producing process are unavailable. Therefore, they are not
be classified by GHS.
In here, GHS classification of the each metallic ingredients (cobalt and chromium) forcomposing the Cemented Carbide can be disclosed. In addition, other hazards andharmful effects (for health, environment, physical and chemical) which are not listed are
unclassifiable or non-applicable by GHS.
GHS classification for the hazards of cobalt alone in below,(When cobalt is included as ingredients of Cemented Carbide.)Health Hazard
Category4
・Acute toxicity (oral)
・Acute toxicity (inhaled: dust, mist) Category1・Serious eye damage / eye irritation Category2B
Category1A・Respiratory sensitization
Category1A・Skin sensitization
Category2
・Carcinogenicity
Category1B
・Reproductive toxicity
Category1
・Specific target organ toxicity(Respiratory)(Single exposure)
Category1
・Specific target organ toxicity(Respiratory, Heart,(Repeated exposure)
Thyroid, Blood)整理番号 機工－０１１－８

Environmental
Hazard:2/9

・Hazardous to the aquatic
environment – prolonged (Chronic
hazard)・Hazardous to the aquatic
environment – repeated (Acutehazard)Category1
Category1

GHS classification for the hazards of chromium alone in below,(When chromium is included as ingredients of Cemented Carbide.)Health Hazard
Category2B・Serious eye damage
Category1
・Respiratory sensitization
Category1
・Skin sensitization
Category2
・Germ cell mutagenicity
Category2
・Specific target organ toxicity(Respiratory tract irritation)(Single exposure)
Category3
・Specific target organ toxicity(Respiratory)(Repeated exposure)
GHS Label Elements
GHS label elements of the each metallic ingredients (cobalt and chromium) for composing
the Cemented Carbide can be disclosed in below.
Cobalt

Chromium

HazardPictograms：

SignalWords：
HazardStatements：

Danger・Risk of causing allergies,
・Risk of causing allergies,
asthma or breathing difficulties if asthma or breathing difficulties if
inhaled.
inhaled.
・Risk of causing an allergic skin ・Risk of causing an allergic skinreaction.
reaction.
・May cause cancer.
・Suspected of causing genetic
disease・May cause adverse effects on
・Failure to systemic toxicity
fertility or the unborn child.
・Risk of respiratory irritation.
・Risk of respiratory irritation.
・Cause of respiratory failure
due to long-term or repetitive
exposure.
・May be harmful to aquatic life
due to long lasting effects
Precautionary 【Prevention】
Statements： ･Obtain safety instructions* before use.
･Do not handle until all safety precautions have been read andunderstood.
･Use appropriate personal protection and ventilation system keeping
away from exposure.
･Wear suitable protective gloves.
･When insufficient ventilation, wear respirator as required.

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3/9･Do not breathe dust, fume or vapor.
･Do not eat, drink or smoke in handling area.
･Wash skin thoroughly after handling.
･Do not release into the environment.
【Responses】･ If inhaled, move to fresh air and take a rest with posture easy tobreathe.
･If respiratory symptoms occurs, contact a doctor.
･When feeling ill, get medical advice/attention.
･Take off contaminated clothing and wash before reuse.
･If on skin, rinse away immediately with a large amount of water andsoap.
･If skin irritation occurs, contact a doctor and get medical
advice/attention.
･If exposed or concerned, get medical advice/attention.
･If dust is in eyes, immediately wash away with clean water (remove thecontact lenses if possible). If irritation persists, get medical
advice/attention.
･If a large amount of dust is swallowed, get medical advice/attention
after ingesting plenty of water to dilute.
【Storage】･Avoid sudden changes of temperature and high humidity for storage.
【Disposal】･Dispose of contents/container to an approved waste disposal plantunder the laws.
*For safety instructions, refer to the Japan Cutting & Wear-resistant Tool Association
website（http://www.jta-tool.jp/）.

3. Composition/Information on Ingredients
 Distinction between chemical substance and mixture: Mixture (alloy)
 Chemical name or general name: Cemented Carbide
Cemented Carbide may be coated or surface treated with the following substances.
AlN、Al2O3、TiC、TiCN、TiN、(Al,Ti)N、(Al,Cr)N、(Al,Cr,V)N、(Ti,Al,Cr)N、Cr3C2、CrN、(Ti,Si)N、(Ti,Zr)N、WC、VC 、C（Disamond、DLC）
 Ingredients and concentration or concentration range (composition) of the Cemented
CarbideIngredientChemical
Formula

CAS NoOfficial Numberof Law for
PRTR

Official Number ofIndustrial Safety
and Health Law

Compositionmass%

Tungsten carbideWC

12070-12-1

N/A

N/A

55-95

Tantalum carbide

TaC

12070-06-3

N/A

N/A

0-20

Niobium carbide

NbC

12069-94-2

N/A

N/A

0-20

Titanium carbide

TiC

12070-08-5

N/A

N/A

0-20

Titanium nitride

TiN

25583-20-4

N/A

N/A

0-5

Vanadium carbide

VC

12070-10-9Class1:321

N/A

0-5

CobaltCo

7440-48-4

Class1:132

Appendix9-172

0-30

ChromiumCr

7440-47-3

Class1:87

Appendix9-142

0-5整理番号 機工－０１１－８

4/9*For the details regarding the content of the designated chemical material such as cobalt,
chromium, and vanadium carbide (effective digit: 2), please contact to the above
supplier.
*Even if the Cemented Carbide do not contain cobalt, chromium as an active ingredient
may include cobalt, chromium as an impurity.

4. First-Aid Measures
If Inhaled If the high concentration of dust is inhaled or respiratory symptoms (coughs, gasping,shortness of breath, etc.) are experienced, move to fresh air and take a rest with postureeasy to breathe. If breathing difficulties occur, administer oxygen inhalation. If breathinghas stopped, immediately administer artificial respiration and get medical
advice/attention.
 If irritation or rash persists, get medical advice and attention.
If on Skin If dust is contacted with skin, take off contaminated clothing and rinse the affected areawith soapy water thoroughly. If irritation or rash persists, get medical advice/attention.
If in Eyes
 If dust is in eyes, immediately wash away with clean water (remove the contact lenses if
possible). If irritation persists, get medical advice/attention.
If Swallowed If a large amount of dust is swallowed, get medical advice/attention after ingesting
plenty of water to dilute.
5. Fire-Fighting Measures
Suitable Extinguishing Media and Unsuitable Extinguishing Media To extinguish the fire of dust, use dry sand, expanded vermiculite, dilatable perlite, ABC
type (general, oil, electric fire) powder extinguishers or water (no water allowed for thedust containing cut powders of light metal such as magnesium and aluminum).
Special Protective Equipment and Emergency Procedures for Fire-Fighters
 In fighting a fire, wear a protective clothing, dust-proof respirator or respiratory
protective equipment.
6. Accidental Release Measures
Personal Precautions, Protective Equipment, and Emergency Procedures
 It is recommended that someone who cleans dust should wear clothing and respiratory
protective equipment to minimize exposure.
Environmental Precautions
 Dispose of dust as industrial wastes and prevent release in water systems.
Containment and Cleanup Methods and Equipment
 If there is dust which occur from Cemented Carbide producing process, isolate the area
and remove with a cleaner equipped with a filter which can take up fine particles very
efficiently. If appropriate removing methods are not available, sweep with water
sprayers or wet mops.
7. Handling and Storage
Handling■ Technical Measures If the disperse of dust containing cobalt is concerned, provide local exhaust ventilation
and use personal protective equipment to minimize exposure to human body.

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5/9■ Precautions for Safe Handling Obtain safety instructions before use.
 Do not handle until all safety precautions have been read and understood.
■ Contact Avoidance Take measures described in “Exposure Controls/Personal Protection.” Do not breathe dust, fume or vapor.
 Do not eat, drink or smoke in handling area.
■ Hygiene Measures
 Wash skin thoroughly after handling.
 Do not release into the environment.
Storage■ Conditions for Safe Storage
 Avoid sudden changes of temperature and high humidity for storage.
 If storing fine powder, dust, and swarf generated by cutting or polishing, cover themwith a cover to prevent dispersal.
■ Materials for Safe Container
 Use materials meeting the specific gravity of Cemented Carbide.
8. Exposure Controls/Personal Protection
Exposure Prevention
・Permissible concentration in working environment (reference value)

IngredientChemical
Formula

OSHA* PEL*
mg/m3

ACGIH* TLV*
mg/m3

Japan Society for
Occupational Health
Exposure Limit*
mg/m3

Tungsten carbide
Tantalum carbide
Niobium carbide
Titanium carbide
Titanium nitride
Vanadium carbide
Cobalt
Chromium

WC
TaC
NbC
TiC
TiN
VC
Co
Cr

5 (as W)
5 (as Ta)
N/A
N/A
N/A
N/A
0.1
1.0

5 (as W)
5 (as Ta)
N/A
N/A
N/A
N/A
0.02
0.5

N/A
N/A
N/A
N/A
N/A
N/A
0.05
0.5

Occupational Safety & Health Administration U.S. Department
Permissible Exposure Limit
American Conference of Governmental Industrial Hygienists Inc.
Threshold Limit Value
If processing such as polishing and cutting that generates dust, foringredients with not indicated value, refer to the exposure limit of theJapan Society for Occupational Health
Not Applicable*N/A：
・Facility measures
Provide local exhaust ventilation so that dusts in the air may not exceed the exposure
limits in the above table. It is to be noted that management concentration of the cobalt(and its inorganic compounds) is to be 0.02mg/m3 in accordance with the working
environment assessment standard by Japanese Minister of Health, Labour and Welfare
under the paragraph (2), Article 65-2 of the Industrial Safety and Health Act in Japan.
In addition, cobalt (and its inorganic compounds) in the storage or handling, and that totake the necessary action conforming to the Ordinance on Prevention of Hazards due toSpecified Chemical Substances.
*OSHA：*PEL：*ACGIH：*TLV：* Exposure
Limit:

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Protection Measures
 Respiratory Protection:
 Hand Protection:
 Eye Protection:
 Skin/Body Protection:

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Dust-proof respirators and respiratory protective equipment
are recommended.
Protective gloves for dust are recommended.
Protective glasses for dust are recommended.
Avoid direct skin contact.
Clean up deposited dust on clothing, rags, etc. by washing or
absorbing with suitable filters but not by whisking off.
Change the contaminated clothing into clean one.

Hygiene Measure
Wash skin thoroughly after handling.

9. Physical and Chemical Properties
Physical State:
Color :

Solid state
Dark gray color(in case of the coated or surface treatedcemented carbide, the appearance color
is often different.)
Odor:
Odorless
Melting/Freezing Point:
No data available
Boiling or Initial Boiling Point and Boiling No data available
Range:
Flammability, Explosion Limits, Flammability No data available
Limit, Flash Point, Spontaneous Ignition
Temperature, Resolution Temperature:pH:
No data available
Kinematic Viscosity:
No data available
Solubility:
Insoluble
Vapor Pressure:
No data available
Density and/or Relative Density:
11.0 - 15.5
Relative Gas Density:
No data available
Particle Properties:
No data available

10. Stability and Reactivity
A grain of dust which occur from Cemented Carbide producing process is very fine andunder the specific conditions in which the dusts are mixed with grinding oil with low flash
point, it is possible to become pyrophoric. If dusts under very flammable conditions are
dispersed in the air, it is possible to explode.
The each metallic ingredients (cobalt and chromium) for composing the cemented carbide
has the following information about stability and reactivity under specific conditions.
Stability and reactivity of cobalt alone in below,(When cobalt is included as ingredients of Cemented Carbide.)
Reactivity, chemical stability:
Stable to heat and contact with water
Ignite spontaneously in air
Hazardous reactions:
It reacts with strong oxidizing agents
It reacts violently with oxygen, and it poses a riskof fire or explosion
It reacts violently with acid to generate hydrogen
Conditions to avoid:Contact with incompatible materials
Incompatible materials:
Strong oxidizing agents, acidHazardous decomposition products:
By combustion, cobalt oxide and fumes of cobalt
oxide may occur

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Stability and reactivity of chromium alone in below,(When chromium is included as ingredients of Cemented Carbide.)
Reactivity, chemical stability:
Stable under normal handling conditions
Hazardous reactions:
Reacts violently with strong oxidizing agents suchas hydrogen peroxide, it poses a risk of fire or
explosion.
It reacts with dilute hydrochloric acid and dilute
sulfuric acid.
Conditions to avoid:
The alkali or alkaline carbonate is Incompatible.
When mixed with air in powder or granular form,
there is a possibility of dust explosion.
Incompatible materials:
Strong oxidizing agents, dilute hydrochloric acid,
dilute sulfuric acid, alkali, alkali carbonate
Hazardous decomposition products:
During combustion, there can be irritating or toxic
fumes and gases.

11. Toxicological Information
Acute Toxicity:
Skin Corrosion/Irritation:
Serious Eye Damage/Eye Irritation:
Respiratory or Skin Sensitization:
Germ Cell Mutagenicity:
Carcinogenicity:

No data available on Cemented Carbide
No data available on Cemented Carbide
No data available on Cemented Carbide
No data available on Cemented Carbide
No data available on Cemented Carbide
Group 2A on IARC, as cobalt powder
coexisting with tungsten carbide powder.
Suspected to be carcinogenic in humans(Ref.1)
Reproductive Toxicity:
No data available on Cemented Carbide
Specific Target Organ Toxicity/Systemic Toxicity: No data available on Cemented Carbide(Single Exposure)Specific Target Organ Toxicity/Systemic Toxicity: No data available on Cemented Carbide(Repeated Exposure)
Aspiration Hazard:
No data available on Cemented Carbide

12. Ecological Information
Ecotoxicity, Persistence, Degradability, Bioaccumulation, Mobility in soil, Hazardous tothe ozone layer
 Not reported on Cemented Carbide
13. Disposal Considerations
Safe and environmentally desirable disposal method The main ingredients such as tungsten carbide, cobalt are rare metal. It is desirable tocollect and recycle them.
 For disposal, conform to the applicable laws regarding industrial wastes such as ‘Waste
Disposal and Public Cleansing Law’ and relevant local by laws.
14. Transport Information
International Regulations
UN Number:
Not applicable
Proper Shipping
Not applicable
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UN Hazard Class:Not applicable
Marine Pollutant:
Not applicable*When transporting a powder of metallic ingredients (cobalt) for composing the Cemented
Carbide, there is a possibility that it is necessary to take appropriate action in accordancewith the relevant provisions established by IMO (International Maritime Organization),
ICAO (International Civil Aviation Organization), IATA (International Air Transport
Association).

Domestic Regulations
Land Regulatory Information

In accordance with theFire Service Act/ theRoad Act
Marine Transportation
In accordance with theInformation:
Ship Safety Act/ the
Act
on
Port
Regulations
Marine Pollutant:
Not applicable
Aviation transportation
In accordance with the
Civil Aeronautics Act
information：*When transporting a powder of metallic ingredients (cobalt) for composing the Cemented
Carbide, there is a possibility that it is necessary to take appropriate action in accordancewith the relevant provisions of Ship Safety Law and the Aviation Law.
Special Safety Measures for Transportation and Transportation Method
When transporting the dust which occur from Cemented Carbide producing process, makesure that there is no damage or corrosion or leakage of the container, to ensure
implementation of the prevention of collapse of cargo.

15. Regulatory Information
Name and Information of Applicable Regulatory Law for Pollutant Release and Transfer Register (PRTR)
Vanadium carbide: “Class 1 designated chemical substances”, Cabinet Order No.321
Cobalt: “Class 1 designated chemical substances”, Cabinet Order No.132
Chromium: “Class 1 designated chemical substances”, Cabinet OrderNo.87


Industrial Safety and Health Law, Ordinance on Prevention of Hazards due toSpecified Chemical Substances
Cobalt: The substances are defined in the Article 57-2 of the Act, and the cobalt
is listed by No.172 in Appended Table9 in the Article 18-2 of the
Enforcement Order as “Dangerous or Harmful Substances to be notified
their names, etc.”
Article 2, Paragraph 1, Items 2 and 5 of Ordinance on Prevention ofHazards due to Specified Chemical Substance, Specified chemical
substance class 2, Management class 2.
When the content of cobalt and cobalt oxide is less than 1%, theOrdinance on Prevention of Hazards due to Specified Chemical
Substance is not covered.
Chromium: The substances are defined in the Article 57-2 of the Act, and thechromium is listed by No.142in Appended Table9 in the Article 18-2 ofthe Enforcement Order as “Dangerous or Harmful Substances to be
notified their names, etc.”

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16. Other Information
Other Hazardous Information
The following attention should be paid for dust which occur from Cemented Carbide
producing process.
 If a large amount of dust containing cobalt is inhaled, blood, heart, thyroid gland, andspleen disorders may result. (Ref.2)
 It is reported that repeated or prolonged contact with cobalt or chromium may affectskin, respiratory organs, heart, etc. (Ref.3 - 6)
 For carcinogenicity of metallic ingredients of cemented carbide has the following
knowledge.
Cobalt metal
ACGIH
A3: Confirmed animal carcinogen withunknown relevance to humans.
IARC
2B: Possibly carcinogenic to humans.
Japan Society for
2B: The substance has been determined to be
Occupational
possibly carcinogenic to humans (withHealthrelatively insufficient evidence).
Chromium metal
IARC
3: Not classifiable as to its carcinogenicity tohumans.
*ACGIH：

American Conference of Governmental Industrial Hygienists Inc.

*IARC：

International Agency for Research on Cancer

Disclaimer
The contents of this SDS are based on material and information available as of today andmay be revised due to knowledge newly obtained. The values of concentration,
physical/chemical properties are not guaranteed. In addition, the precautions describedherein apply only to normal uses, and thus safety cannot be guaranteed.
Reference URL
 Ministry of Economy, Trade and Industry：
http://www.meti.go.jp/
 Ministry of the Environment：
http://www.env.go.jp/
 Ministry of Health, Labour and Welfare：
http://www.mhlw.go.jp/
 Japan Industrial Safety and Health Assoc.：
http://www.jaish.gr.jp/
 International Agency for Research on Cancer：
http://monographs.iarc.fr/
 International Chemical Safety Card：
http://www.nihs.go.jp/ICSC/ National Institute of Technology and Evaluation：
http://www.safe.nite.go.jp/ghs/list.html
Reference Documents(1) IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, vol.86 (2006).
(2) Food & Drug Research Laboratories, study No.8005B (4.11.84).
(3) T. Shirakawa et al., Chest. 95, 29 (1989).
(4) International Chemical Safety Cards (cobalt, chromium, nickel).
(5) The Guide to Chemical Hazards (edited by Japan Industrial Safety & Health
Association)(6) A. O. Bech et al., Brit. J. Ind., 19, 239 (1962).
Revision History
Rev.8
3rd April, 2023

Change of company name and update of latest information