Home / About Us / What’s New / Terms of Sale / Employment Opportunities / Contact Us

Federal Carbide Company

814-684-7600 / 800-631-3640
Fax: 814-684-9400
inquiry@federalcarbide.com

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Tungsten Carbide

Grade Charts

Tungsten Carbide Material Safety Data Sheet

1: Identification of the substance/mixture and of the company / undertaking

1.1: Product identifier

Substance Name

Tungsten Carbide

Chemical Name and Formula

Cemented Tungsten Carbide (CW) with Cobalt/Nickel Binder

CAS No.

12070-12-1

EINECS No.

235-123-0

Molecular weight

195.851

Trade Name/Synonyms

All Federal Carbide Cemented Tungsten Carbide Grades


1.2: Relevant identified uses of the substance or mixture and uses advised against

Identified Uses

  1. Production of hardmetal powder
  2. Production of sintered hardmetal articles
  3. Production of WC-containing diamond tools
  4. Powder metallurgical production of WC-containing articles
  5. Application of WC-containing coatings via thermal spraying
  6. Use of WC-containing articles
  7. Recycling of WC-containing scrap materials

Uses advised against

Not applicable


1.3: Details of the supplier of the safety data sheet

Name

Federal Carbide Company

Address

One Eagle Ridge Road, Tyrone, PA 16686 USA

Phone

(814) 684-7600

Fax

(814) 684-9400

Email

Inquiry@federalcarbide.com


1.4 : Emergency telephone number



National centre for Prevention and Treatment of Intoxications No.

1-800-222-1222

Emergency telephone at the company

Available outside office hours

(814) 684-7600

Yes

X No8:30am – 5pm EST


2: Hazards Identification

2.1: Classification of the substance or mixture

Classification according to EC 1272/2008:

Not Classified

Classification according to 67/548/EEC:

Not Classified


2.2: Label elements (according to EC 1272/2008 )

Hazard pictogram(s):

No pictogram

Signal word:

No signal word

Hazard Statement(s):

None

Precautionary statement(s):

None


2.3: Other Hazards

PBT or vPvB

Tungsten carbide is an inorganic substance and therefore, the PBT and vPvB assessment is not required.


3: Composition / information on ingredients

3.1: Substances

Material

CAS#

% by Weight*

OSHA TWA (mg/m3)

ACGIH TWA (mg/m3)

OSHA STEL (mg/m3)

Tungsten Carbide (limits for tungsten dusts)

12070-12-1

40 – 97


5


5


10


Cobalt

7440-48-4

0 – 30

0.1

0.02

-

Nickel

7440-02-0

0 – 30

1

1

-

Tantalum Carbide (limits for tantalum dusts)

12070-06-3

0 – 50


5

5

-

Chromium Carbide (limits for trivalent chromium dusts)

7440-47-3

0 - 5

1.0

0.5

-

*Total impurities less than 2% and no single impurity greater than 0.1% is considered relevant for the classification and labelling.

* Depends on grade specification.

TWA – Time Weighted Average (an employee’s average airborne exposure in any 8 hour shift of a 40 hour work week).

STEL – Short Term Exposure level (an employee’s 15 minute time weighted average exposure at any time during a work day).

This product contains substances that are subject to the reporting requirements of Section 313 of the Title III of the Superfund Amendments and Realization Act of 1986 and 40 CFR Part 372.

4: First aid measures

4.1: Description of first aid measures

Eyes

Rinse opened eye for several minutes under running water. Consult a doctor if required.

Inhalation

Remove to fresh air. Seek medical attention if required.

Ingestion

Rinse mouth with water and drink plenty of water afterwards. Seek medical advice if required.

Skin

Immediately wash with soap and water and rinse thoroughly. Seek medical attention if required.

General advise

After first aid, get appropriate medical attention.


4.2: Most important symptoms and effects, both acute and delayed

In general, metal powders or dust may cause mechanical eye and skin irritation. Inhalation of powder or dust may cause mild respiratory tract irritation.


4.3: Indication of any immediate medical attention and special treatment needed

None known


5: Firefighting measures

5.1: Extinguishing media

Substance is non-flammable. Extinguishing methods depend upon hazards in vicinity. Use water or dry extinguishing powders, sand, CO2 or other inert material as extinguishing media. Do not use water if any water-reactive metal powders are nearby.


5.2: Special hazards arising from the substance or mixture

No hazardous decomposition products are known.


5.3: Advice for firefighters

Use a self-contained breathing apparatus and a protective suit.


6: Accidental release measures

6.1: Personal precautions, protective equipment and emergency procedures

Avoid contact with skin and eyes, and formation and accumulation of dust. Use personal protective equipment (ie gloves, safety goggles, dust respirator) as specified in Section 8 of this SDS. Ventilate area of spill.


6.2: Environmental precautions

Avoid release into the environment.


6.3: Methods and material for containment and cleaning up

Use clean-up methods which avoid dust generation, such as vacuuming (with filter that prevents re-suspension of dust) or wet clean-up, and fill into appropriate sealable containers. Clean remaining spills with water. Dispose of wastes according to regulations.


6.4: Reference to other sections

See sections 8 and 13 for exposure controls and disposal considerations.


7: Handling and storage

7.1: Precautions for safe handling

Ensure adequate ventilation and, if necessary, exhaust ventilation when handling or transferring this material. Use good housekeeping procedures to prevent accumulation of dust and ensure that accepted limit values are complied with. Wear personal protective equipment when handling.


7.2: Conditions for safe storage, including any incompatibilities

Store in tightly closed containers in a well ventilated area. Store under dry and cool conditions, and away from incompatible materials (oxidizing agents) and direct sunlight.


7.3: Specific end use(s)

  1. Production of hardmetal powder
  2. Production of sintered hardmetal articles
  3. Production of WC-containing diamond tools
  4. Powder metallurgical production of WC-containing articles
  5. Application of WC-containing coatings via thermal spraying
  6. Use of WC-containing articles
  7. Recycling of WC-containing scrap materials

8: Exposure controls / personal protection

8.1 : Control parameters

Country

For tungsten and insoluble compounds, as tungsten

8-h Limit Value (mg/m3)

Short-term Limit Value (mg/m3)

Austria http://www.dguv.de/ifa/en/gestis/limit_values/pdf/au.pdf

5*

10*

Belgium

5

10

Canada (Québec)

5

10

Denmark

5

10

Poland

5

Spain

5

10

Sweden

5

Switzerland

5*

USA - NIOSH

5

10†

United Kingdom http://www.dguv.de/ifa/en/gestis/limit_values/pdf/uk.pdf

5

10

* Inhalable aerosol; †15-minutes




DNELs and PNECs


Exposure pattern

Route

DNEL

Long-term - systemic effects

Dermal

Workers: 1.8 mg/kg bw/day (1.7 mg W/kg/day)

General Population: 0.51 mg/kg bw/day (0.48 mg W/kg/day)

Long-term - systemic effects

Inhalation

Workers: 6.2 mg/m³ (5.8 mg W/m3)

General Population: 1.8 mg/m³ (1.7 mg W/m3)

Long-term - systemic effects

Oral

Workers: Not applicable

General Population: 0.51 mg/kg bw/day (0.48 mg W/kg/day)

The most relevant routes of potential exposure to workers would be the dermal and inhalation routes and the relevant routes of exposure for the general population are the oral, dermal, and inhalation routes. Based on the available acute toxicity data (oral, dermal, inhalation), tungsten carbide is not an acute toxicant and therefore, derivation of DNEL long-term will be sufficient to control potential risks associated with short-term exposures. In addition, tungsten carbide was not irritating to either the eyes or skin and was not sensitizing to the skin in standard tests. Therefore, tungsten carbide does not appear to elicit local toxicity effects and deriving a DNEL for local effects is not necessary.


PNEC

Value

PNEC aqua – freshwater

0.338 mg dissolved tungsten/L

PNEC aqua - marine water

0.0338 mg dissolved tungsten/L

PNEC aqua – intermittent releases

0.310 mg dissolved tungsten/L

PNEC sediment freshwater

960 mg tungsten/kg

PNEC sediment marine

96 mg tungsten/kg

PNEC soil

2.17 mg tungsten/kg dry soil

PNEC sewage treatment plant

9.39 mg tungsten/L

PNEC oral

11 mg tungsten/kg food


8.2: Exposure controls

Appropriate engineering controls:

Engineering controls may include local ventilation systems with dust filters depending on degree of process automation and containment (e.g. closed vs. open processes).


Individual protection measures:

Eye/face protection

Use of safety glasses as appropriate and reasonably necessary, depending on degree of process automation and containment (e.g. closed vs. open processes).

Skin protection

Use of work gloves and work clothes as appropriate and reasonably necessary, depending on degree of process automation and containment (e.g. closed vs. open processes).

Respiratory protection

Use of respiratory protection as appropriate and reasonably necessary, depending on degree of process automation and containment (e.g. closed vs. open processes).

Environmental exposure controls

FACILITY LEVEL ENVIRONMENTAL EMISSIONS/MITIGATION1

Air Emission Controls

RMMs for air (present in >90% of the sites2):

• Fabric or bag filters (reported most common)

• Wet scrubbers (reported second most common)

• Ceramic filters

• Dry or semi-dry scrubbers

• Electrostatic precipitation (not common)

Water Emission Controls

The 50th percentile or reported site-specific removal efficiency for nine sites. RMMs for water (present in >90% of the sites for metal compound production2):

• Chemical precipitation

• Sedimentation

• Filtration

• Electrolysis (not common)

1 Typical RMMs are provided for illustrative purposes and should be applied as appropriate and reasonably necessary to prevent adverse effects, indicated by a risk characterisation ratio (RCR) of less than one, on human health and the environment.

2 Based on input parameters derived from the Specific Emission Release Categories (spERCs) for metals (ARCHE, 2010), spERC for Manufacture and Recycling of Massive Metal and Metal Powder v.1.2.


9: Physical and chemical properties

9.1: Information on basic physical and chemical properties

Appearance

Black or grey powder

Odor

Odorless

Odor threshold

Not applicable as the substance is odorless

pH

Not relevant due to physical form (powder)

Melting point/freezing point

2785-2920°C

Initial boiling point/boiling range

6000°C

Flash point

Not relevant as the substance is inorganic

Evaporation rate

Not relevant due to physical form (powder)

Flammability

Non-Flammable

Upper/lower flammability or explosive limits

Not relevant as the substance is not flammable

Vapor pressure

Not relevant due to physical form

Vapor density

Not relevant due to physical form

Relative density

15.63 - 15.7 g/cm3

Solubility in water

Insoluble

Partition coefficient (n-octanol/water)

Not relevant as the substance is inorganic

Auto-ignition temperature

Tungsten carbide is not a self-heating substance down to a particle FSSS size of 0.53 µm

Decomposition temperature

Greater than 2920°C (melting point)

Viscosity

Not relevant due to physical form (powder)

Explosive properties

Not explosive

Oxidising properties

Not oxidising


9.2: Other information

Granulometry

Varies with grade composition


10: Stability and reactivity

10.1: Reactivity

No hazardous reactions known.


10.2: Chemical stability

Stable under normal ambient and anticipated storage and handling conditions of temperature and pressure.


10.3: Possibility of hazardous reactions

None known


10.4: Conditions to avoid

Avoid formation and accumulation of dust.


10.5: Incompatible materials

None known


10.6: Hazardous decomposition products

None known


11: Toxicological information

Toxicological information is available for tungsten carbide. However, for some of the endpoints in this section read across to tungsten blue oxide or sodium tungstate needed to be conducted due to the lack of relevant tungsten carbide data.

11.1: Information on toxicological effects

Acute oral

Rat (male/female) LD50 reported to be >2000 mg/kg bw (OECD 401).

Acute inhalation

Rat (male/female) LC50 (4h) reported to be >5.3 mg/L (OECD 403).

Acute dermal

Rat (male/female) LD50 reported to be >2000 mg/kg bw (OECD 402).

Skin corrosion/irritation

In a skin irritation study conducted on rabbits (male), tungsten carbide elicited no dermal irritation (OECD 404).

Eye damage/irritation

In an eye irritation study conducted on rabbits, tungsten carbide elicited no eye irritation (OECD 405).

Respiratory/skin sensitisation

In a Guinea pig maximization test (OECD 406), tungsten carbide did not produce evidence of skin sensitisation (delayed contact hypersensitivity) in any of the test animals.

No respiratory sensitization study is available for tungsten carbide.

Germ cell mutagenicity

Tungsten carbide was negative for mutagenicity in an in vitro bacterial gene mutation assay (OECD 471), and an in vitro micronucleus assay (OECD 487). No in vitro L5178Y TK +/- mouse lymphoma forward mutation assay (OECD 476) data of sufficient quality is available for WC. However, in vitro L5178Y TK +/- mouse lymphoma forward mutation assay is available for tungsten metal and results were negative. Based on the lack of mutagenicity reported in in vitro assays, tungsten carbide is not considered a mutagen.

Carcinogenicity

No carcinogenicity data available.

Reproductive toxicity

No reproductive/developmental studies are available for tungsten carbide. However, data are available on sodium tungstate and tungsten blue oxide, which are used for read across. Tungsten carbide is not considered a reproductive toxicant based on a one-generation reproductive study (EPA OPPTS 870.3800/870.3650) on sodium tungstate that resulted in no significant effects on reproductive/developmental parameters, as well as a lack of reproductive organ effects in male and female rats following a 28 -days inhalation exposure (OECD 412) to tungsten blue oxide.

STOT single exposure

No significant systemic effects were observed.

STOT repeated exposure

Exposure to tungsten carbide to a concentration of 15 mg/m3 for 90-days (OECD 413) resulted in a female rat NOAEL of ≥15 mg/m3 and a male rat LOAEL of 15 mg/m3 (based on mild histopathological alterations in the lungs). In addition, a rat 28-day inhalation toxicity study on tungsten blue oxide (OECD 412), which is used for read across resulted in a NOAEL of 0.65 mg/L (maximum dose tested) as no significant adverse effects were observed at any of the doses tested.

Aspiration hazard

Tungsten carbide is not an expected aspiration hazard due to physical form.



Information on likely routes of exposure

The relevant routes of exposure for the general population are the oral, dermal, and inhalation routes. The most relevant routes of potential exposure to workers would be the dermal and inhalation routes.

Symptoms related to the physical, chemical and toxicological characteristics

In general, metal powders or dust may cause mechanical eye and skin irritation. Inhalation of powder or dust may cause mild respiratory tract irritation.


Delayed and immediate effects as well as chronic effects from short and long-term exposure

None known


Interactive effects

None known


12: Ecological information

Limited ecological information is available for tungsten carbide. Therefore, read across to sodium tungstate was conducted for some of the endpoints in this section.

12.1: Toxicity

Toxicity to fish

Zebrafish 96-h LC50 >1000 mg tungsten carbide/L (OECD 203).

Zebrafish 38-day flow-through early-life stage/reproduction/ (sub)lethal effects NOEC ≥9.8 mg sodium tungstate/L (approximately 5.74 mg tungsten/L) (OECD 210).

Toxicity to invertebrates

Daphnia magna 48-h EC50 >1000 mg tungsten carbide/L (OECD 202).

Daphnia magna 21-day NOEC based on immobilisation ≥85.1 mg sodium tungstate/L (approximately 50 mg tungsten/L) (OECD 211).

Daphnia magna 21-day NOEC based on reproduction and growth 44.2 mg sodium tungstate/L (approximately 26 mg tungsten/L) (OECD 211).

Toxicity to algae and plants

Desmodesmus subspicatus (algae) 72-h EC50 based on growth rate >1 mg tungsten carbide/L (OECD 201).

Pseudokirchneriella subcapitata (algae) 72-h EC50 based on growth rate >17.7 mg sodium tungstate/L (approximately 10.4 mg tungsten/L) (OECD 201).

Pseudokirchneriella subcapitata (algae) 72-h NOEC based on growth rate 0.81 mg sodium tungstate/L (approximately 0.476 mg tungsten/L) (OECD 201).

12.2: Persistence and degradability

Although no data were available for tungsten carbide, degradation is not a relevant pathway for this substance as an inorganic metal compound. Persistence is not applicable for this substance as an inorganic substance.


12.3: Bioaccumulative potential

Bioaccumulation/bioconcentration of tungsten carbide is not expected to occur in aquatic or sediment species, as the bioavailability of tungstate (the most common bioavailable form) from tungsten compounds is expected to be at low concentrations in the water column due to stream and river sediment adsorption and low potential for leaching from soils. Furthermore, any uptake mediated by transport proteins would be expected to be internally regulated. The absence of methylated tungsten species also supports the claim that bioaccumulation is not expected to be of concern for tungsten carbide as an inorganic metal compound.


Based on BCFs calculated from paired concentrations of tungsten in soil and worm, or soil and plant tissue, tungsten carbide exposures are not expected to result in the bioaccumulation of tungsten in terrestrial organisms.


12.4: Mobility in soil

No data on the behavior of tungsten carbide in the environment are available. However, data for sodium tungstate and tungsten metal are expected to adequately capture the range of mobility of tungsten carbide in the environment. The adsorption/desorption is highly dependent on the characteristics of the soil system in question. For example, soil sorption coefficients of tungsten metal and sodium tungstate are found to increase with decreasing pH. Additionally, soil-tungsten systems may take up to approximately 3-4 months to reach equilibrium. Soil sorption coefficients measured for sodium tungstate ranged from 16.6 to 863 L/kg.


12.5: Results of PBT and vPvB assessment

Tungsten carbide is an inorganic substance, and therefore the PBT and vPvB assessment is not required.


12.6: Other adverse effects

None known


13: Disposal considerations

13.1: Waste treatment methods


FACILITY LEVEL ENVIRONMENTAL EMISSIONS/MITIGATION1

Waste Management Controls

Dispose in accordance with local/regional/national/international regulations. Two options are recommended:

1. Re-use

2. Recycling or other recovery


Wastewater should be processed through a sewage treatment plant (STP) either on-site or off-site.

1 Typical RMMs are provided for illustrative purposes and should be applied as appropriate and reasonably necessary to prevent adverse effects, indicated by a risk characterisation ratio (RCR) of less than one, on human health and the environment.


14: Transport information

14.1: UN-No.:

Not applicable

14.2: UN proper shipping name:

Not applicable

14.3: Transport hazard class(es):

Non-hazardous

14.4: Packing group:

Not applicable

14.5: Environmental hazard(s):

Non-hazardous

14.6: Special precaution(s) for user:

Non-hazardous

14.7: Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code:

Not applicable


15: Regulatory information

15.1: Safety, health and environmental regulations/legislation specific for the substance or mixture

EU Regulations: REACH

National Regulations: None known


15.2: Chemical safety assessment

A chemical safety report has been carried out on tungsten carbide. No exposure scenarios are attached to this SDS following the European Chemicals Agency Guidance on the Compilation of Safety Data Sheets (October 2010) requirements. An exposure scenario is only required for those substances fulfilling the criteria for any of the listed hazard classes in Article 14(4) of Registration, Evaluation, and Authorization of Chemicals (REACH) as amended by Article 58 of Classification, Labeling and Packaging (CLP).

16: Other information

Directive 67/548/EEC:

Not classified

Revision(s):

SDS prepared on 3 September 2014. Prepared in accordance with Annex II of the REACH Regulation (EC) 1907/2006, Regulation (EC) 1272/2008 and Commission Regulation (EU) 453/2010.


Abbreviations:

BCF

Bioconcentration Factor

bw

Body weight

°C

Degrees Celsius

ca.

Approximately

CAS

Chemical Abstracts Service

cm

Centimetre(s)

DNEL

Derived No Effect Level

EC

European Commission

EC50

Effect Concentration 50%

EEC

European Economic Community

EINECS

European Inventory of Existing Commercial chemical Substances

EU

European Union

FSSS

Automated Fisher Number Particle-Sizing System

g

Gram(s)

h

Hour(s)

kg

Kilogram(s)

L

Litre(s)

LC50

Lethal Concentration 50%

LD50

Lethal Dose 50%

LOAEL

Lowest Observed Adverse Effect Level

m

Meter(s)

MARPOL

International Convention for the Prevention of Pollution From Ships

mg

Milligram(s)

NIOSH

National Institute for Occupational Safety and Health

NOAEL

No Observed Adverse Effect Level

NOEC

No Observed Effect Concentration

No.

Number

OECD

Organisation for Economic Co-operation and Development

PBT

Persistent, Bioaccumulative, and Toxic

PNEC

Predicted No Effect Concentration

RCR

Risk Characterization Ratio

REACH

Registration, Evaluation, Authorization and Restriction of Chemical substances

RMM

Risk Management Measure

SDS

Safety Data Sheet

spERC

Specific Emission Release Categories

µm

Micrometer(s)

vPvB

very Persistent, very Bioaccumulative

W

Tungsten

WC

Tungsten carbide

w/w

Weight to weight


End of Safety Data Sheet

 
Federal Carbide Company • One Eagle Ridge Road • Tyrone, Pennsylvania 16686 USA
814-684-7600 / 800-631-3640 Fax: 814-684-9400 • inquiry@federalcarbide.comwww.federalcarbide.com