Tungsten Disulphide Powder

Tungsten Disulphide (WS2) Powder

Tungsten Disulphide (WS2 also Tungsten Disulfide) is dry/solid lubricant powder and is one of the most lubricious substances in the world. WS2 offers excellent dry lubricity (COF: 0.03), out-performing any other substance, including Graphite and Molybdenum Disulphide (MoS2).

WS2 has a coefficient of friction of 0.03, it offers excellent dry lubricity, superior to any other substance. It can be used in high temperature and high pressure applications. It offers temperature resistance from -270ºC to 650ºC in normal atmosphere and from -188ºC to 1316ºC in Vacuum. The load bearing property of coated film is extremely high at 300,000 psi.

One of the lowest Coefficient of Friction (Dynamic @ 0.03 and Static @ 0.07) means that applications are almost unlimited and the lubricant could be tried with every conceivable idea. WS2 powder can be added to Oil, Lubricant, Liquids, Water, Plastic etc. to increase lubricity of mixture. WS2 can also be coated on a substrate by Spraying/Buffing/Tumbling.

Temperature and Load Bearing Performance

Tungsten Disulphide (WS2) can also be used in high temperature and high pressure applications. Its temperature range is from -270ºC to 650ºC in normal atmosphere and from -188ºC to 1316ºC in Vacuum. The load bearing ability of the coated film is extremely high - 300,000 psi.

Tungsten Disulphide (WS2) can replace Molybdenum Disulphide (MoS2). See the comparison of WS2 / MoS2.

Applications and Documents

The powder offers one of the lowest Coefficient of Friction (Dynamic @ 0.03 and Static @ 0.07). There are far too many applications for this outstanding product to list here. Don't forget to include it in your next project!

Tungsten Disulphide Powder
  • Automotive parts (Car Engine, Pistons, Cylinders and Cams)
  • Performance and Racing Car Engines and parts
  • Power Transmission Components
  • Precision Gears
  • Spindles Shafts and Seals
  • Rollers
  • Robotics
  • Defence and Aerospace components
  • Bearings (Linear, Ball, Roller etc.)
  • Carbon Brush Solid Lubricant
  • Shafts
  • Marine parts
  • Cutting Tools
  • Blades (Slitters and Knives)
  • Punches and Dies
  • Extrusion Dies
  • Mould release (Plastic injection and rotational moulding)
  • Valve and Actuator components
  • Chains and Sprockets
  • Marine Parts
  • Firearms and Ammunition
  • Sporting Goods
  • Friction lowering additive for Greases and Oils

Property Name Tungsten Disulfide WS2
(CAS No: 12138-09-9)
Colour Silver Grey
Appearance Crystalline Solid
Melting Point 1250ºC, 1260ºC (decomposes)
Boiling Point 1260ºC
Density 7500 Kg.m3
Molecular Weight 248
Coefficient of Friction 0.03 Dynamic; 0.07 Static
Load bearing ability 300,000 psi for coated film
Lubrication Temperature Range Ambient: from -273ºC to 650ºC
Vacuum(10-14 Torr): from -188ºC to 1316ºC
Chemical Durability Inert Substance, Non-Toxic
Magnetism Non-Magnetic
Rockwell Hardness 30 HRc
Coating Specifications Spray Blast substrate with Cold and Dry Air at 120psi
Coating Film Thickness 0.5 micron
Corrosion Stability Can slow down the corrosion rate, but can not fully prevent substrate corrosion
Coatable Substrates Iron, Steel, Aluminum, Copper, other Metals, Plastics and Manmade Solids
Compatibility Oil, Solvent, Paint, Fuel, Water, Resin/Plastic,
WS2 powder is available in Nano grade and sub-micron particle sizes such as 0.4 up to 1.0 micron. Packing (for sub-micron grade): 1 lb plastic bag; 10 lbs plastic bag; 25 Kg (55 lbs.) small drum.
Using WS2 powder
  1. You can mix WS2 powder with wet lubricants (such as oil, grease and other synthetic lubricants). The powder can be mixed 1% to 15% (by weight, as required) with grease or oil. This will enhance lubricity of the mixture.

    • Mixing in WS2 improves high temperature and extreme pressure properties of the base lubricant.
    • The WS2 in the mixture will be coated onto the mating, moving parts during use which, in turn, reduces friction, improves lubricity and load bearing ability for much longer cycles.

  2. You can coat the WS2 powder onto a substrate requiring dry lubricity:

    • The powder can be coated by spraying (at 120 psi) the substrate with dry, cool pneumatic air. It does not require any binders. Spraying can be done at normal room temperature. The coated film will be 0.5 micron thick.
    • The powder can also be mixed with isopropyl alcohol (IPA) and this paste can be buffed onto the substrate.

Material Safety Data Sheet Revision 1.0

Date of issue: 2008/01/02

Revision 1.0: 2018/08/23

Important: Although Garage Lube (Pty) Ltd has attempted to provide current and accurate information herein, the information is based on information provided by the manufacturer. Garage Lube (Pty) Ltd makes no representations regarding the accuracy or completeness of information and assumes no liability for any loss, damage, or injury of any kind which may result from, or arise out of, the use of or reliance on the information by any person.

1. Substance / Preparation and Company Identification


Application: Dry Lubricant

Imported by: Garage Lube (Pty) Ltd

Postnet Suite 038
Private Bag X6011
South Africa

Phone: +27 (72) 501-0016

Fax: +27 (86) 531-1212

Contact Person: Jeff Frandsen

Website: https://www.garagelube.com/

Email Address: info@garagelube.com

2. Composition / Information on Ingredients

Chemical nature (substance): REFRACTORY METAL SULFIDE

CAS-Reg. No.: 12138-09-9

EINECS-NO.: 235-243-3

3. Possible Hazards

Hazard Description: Not Applicable

4. First Aid Measures

Inhalation: if symptoms of pulmonary involvement develop, remove from exposure and seek medical attention.

Skin contact: if irritation occurs, thoroughly wash affected area with mild soap and water and prevent further contact, contact medical help if irritation persists.

Eye contact: if irritation occurs, flush with copious amounts of Water, contact medical help if irritation persists.

Ingestion: if substantial quantities are swallowed, give person (if conscious) a large quantity of water to drink, induce vomiting, and seek medical attention.

5. Fire Fighting Measures

Flash Point: N/A

Flammability Limits: N/A

In case of fire, sulphur dioxide and tungsten trioxide are formed. No Fire Hazard, Use extinguishing agents suitable for surrounding fire. Special Procedures: Use a self-contained breathing apparatus to prevent inhalation of Dust, Mist or fumes that may be generated during fire fighting activities. No unusual fire or explosion hazards.

Suitable extinguishing media: Dry Sand, Special Metal extinguishing powder.

Unsuitable extinguishing media: Water

6. Accidental Release Measures

If Spilled or Released: Ventilate area of spill, clean up using methods which avoid dust generation, such as Vacuuming with appropriate filter, wet dust mop, or wet clean up.

Precautionary measures regarding persons: Remove source of ignition. Avoid formation and deposition of dust. Ensure effective ventilation.

Use the PPE (Personal Protective Equipment) as per chapter 8 (European Union: Note German Technical Regulation on Dangerous Substances No. 200/201)

7. Handling and Storage

Handling:: Maintain good housekeeping procedures to prevent accumulation of dust. Use clean-up methods which minimize dust generation.

Storage: Keep in sealed containers in a dry place.

(European Union: Observe the rules contained in the VCI concept for separate/common storage. Observe official regulations. Storage class as per VCI: 11)

8. Exposure Controls and Personal Protection

Respiratory Protection: Use an appropriate NIOSH approved respirator. If airborne dust levels exceed the TLV, appropriate requirements set forth in 29 CFR 1910.134 should be met. Wash thoroughly after handling and before eating, smoking and end of work shift. Do not shake clothing to remove dust. Avoid inhalation, ingestion and direct skin contact Ventilation: Use local exhaust which is adequate to limit exposure levels below TLV.

Gloves: Recommended

Eye Protection: Recommended

(European Union: Respiratory equipment with filter type P according to DIN EN 143)

9. Physical and Chemical Properties


PH value: 2 @ 20ºC 100 g/l (aqueous suspension)

Boiling Point: N/A

Melting Point: 1250ºC (decomposition)

Vapor Pressure (mm HG): N/A

Vapor Density (air=1): N/A

Solubility in Water: INSOLUBLE

Specific Gravity: (H2O=1) 7.4

Percent Volatile by Volume: 0

Evaporation Rate: N/A

How Best Monitored: AIR SAMPLE

Non-Hazardous Ingredients


Percent by Weight: 100

ACGIH TLV: 5mg/m3 (Limit is for insoluble compounds as W)

10. Stability and Reactivity
Reactivity Data

Stability: Stable

Conditions to avoid: N/A

Incompatible Materials to Avoid: Contact with strong acids may generate Hydrogen Sulfide

Hazardous Decomposition Products: Oxides of Sulfur and Tungsten may be evolved at extreme temperatures.

11. Toxicological Information
Toxicological tests

Acute toxicity:
LD50 Oral, rat: > 2000 mg/Kg
LC50 inhalation, rat > 5.25 mg/l, 4 h of exposure

Irritating/Corrosive effects:
Irritation of eyes/rabbit: slightly irritant
Irritation of the skin/rabbit: non-irritant

Mutagenic effect: Salmonella typhimurium: No Indication of mutagenic effects.

12. Ecological Information
Aquatic toxicity:

Acute fish toxicity: 96 h LC50 (Brachydanio rerio): > 485 μg/l
(Maximum produceable concentration in the case of a weighed portion of 100 mg/l)

Acute toxicity for daphnia: 48 h EC50 (Daphnia magna): > 510 μg/l
(Maximum produceable concentration in the case of a weighed portion of 100 mg/l)

Toxicity for algae:: 72 h EbCo (Scenedesmus subspicatus): > 330 μg/l
72 h ErCo (Scenedesmus subspicatus): > 330 μg/l
(Maximum produceable concentration in the case of a weighed portion of 100 mg/l)

Toxicity to bacteria: 3 h EC50 (activated sludge): 8972 mg/l

13. Disposal Consideration

Disposal: Dispose off in accordance with appropriate Federal, Sate and Local regulations.

Unused material: Reuse if possible.

14. Transport Information

Non Hazardous cargo. Keep separated from foodstuffs

15. Regulatory Information

No Special regulations. No regulated (Observe national regulations) (European Union: No Labelling is required in accordance with the EEC directives. TRGS 900 Atmospheric Threshold Value: Insoluble Tungsten Compounds: 5 mg/m3

Handling restrictions: none

Major accident regulations: not listed in the appendices

Technical Instruction for Air Pollution Control: Figure 5.2.1 Total dust

Water Pollution class (WGK): not harmful to water

16. Other Information


Disclaimer of Expressed and Implied Warranties:

The information presented in this Safety Data Sheet is based on data believed to be accurate as of the date this Safety Data Sheet was prepared. HOWEVER, NO WARRANTY OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY OTHER WARRANTY IS EXPRESSED OR IS TO BE IMPLIED REGARDING THE ACCURACY OR COMPLETENESS OF THE INFORMATION PROVIDED ABOVE, THE RESULTS TO BE OBTAINED REOM THE USE OF THIS INFORMATION OR THE PRODUCT, THE SAFETY OF THIS PROCUCT, OR THE HAZARDS RELATED TO ITS USE. No responsibility is assumed for any damage of injury resulting from abnormal use or from any failure to recommended practices. The information provided above, and the product, are furnished on the condition that the person receiving them shall make their own determination as to the suitability of the product for their particular purpose and on the condition that they assume the risk of their use. In addition, no authorization is given nor implied to practice any patented invention without a license.