Material Safety Data Sheet
Chemical Name: TUNGSTEN DISULFIDE
Trade Name/Synonyms: TUNGSTEN DISULFIDE, TUNGSTEN DISULPHIDE, TUNGSTEN SULFIDE
Chemical Family: REFRACTORY METAL SULFIDE
CAS Number: 12138-09-9 Formula: WS2 Molecular Weight: 248.02
PHYSICAL DATA REACTIVITY DATA
Appearance & Odor: Stability: STABLE
GRAYISH-BLACK POWDER, NO ODOR Conditions to avoid: N/A
Boiling Point: N/A Incompatible Materials to Avoid: CONTACT WITH
Vapor Pressure: (mm HG) N/A STRONG ACIDS MAY GENERATE HYDROGEN
Vapor Density: (air=1) N/A SULFIDE
Solubility in Water: INSOLUBLE Hazardous Decomposition Products: OXIDES OF
Specific Gravity: (H2O=1) 7.4 SULFUR AND TUNGSTEN MAY BE EVOLVED AT
Percent Volatile by Volume: 0 EXTREME TEMPERATURES
Evaporation Rate: N/A
SPILL & LEAK PROCEDURES
How Best Monitored: AIR SAMPLE
IF SPILLED OR RELEASED- VENTILATE AREA OF
NON-HAZARDOUS INGREDIENTS SPILL, CLEAN-UP USING METHODS WHICH
Material: TUNGSTEN DISULFIDE AVOID DUST GENERATION, SUCH AS
Percent by Weight: 100 VACUUMING WITH APPROPRIATE FILTER, WET
ACGIH TLV: 5MG/M3 DUST MOP, OR WET CLEAN-UP. IF DUST IS
LIMIT IS FOR INSOLUBLE COMPOUNDS AS W GENERATED, USE APPROVED NIOSH
RESPIRATOR.
HEALTH HAZARD DATA DISPOSAL-DISPOSE OF IN ACCORDANCE WITH
ROUTES OF EXPOSURE: material can be inhaled, APPROPRIATE FEDERAL, STATE, AND LOCAL
swallowed, or come in contact with the skin or eyes. REGULATIONS
EFFECTS OF OVEREXPOSURE: dust and RESPIRATORY PROTECTION- USE AN
inhalation may cause mild irritation of the nose and APPROPRIATE NIOSH APPROVED RESPIRATOR
throat. With the exception of TOW Russian studies IF AIRBORNE DUST LEVELS EXCEED THE TLV,
that found early signs of pulmonary fibrosis in some APPROPRIATE REQUIREMENTS SET FORTH IN
workers exposed to tungsten trioxide, tungsten 29 CFR 1910.134 SHOULD BE MET
metal, and tungsten carbide, most studies have VENTILATION- USE LOCAL EXHAUST WHICH IS
shown that insoluble tungsten compounds to be ADEQUATE TO LIMIT EXPOSURE LEVELS
toxicologically inert. Skin and eye contact may cause BELOW TLV
irritation due to the abrasiveness of the dust. Recent GLOVES-GLOVES ARE RECOMMENDED
scientific evidence indicates no adverse effects are EYE PROTECTION- RECOMMENDED
likely from accidental ingestion of small amounts of
SPECIAL PRECAUTIONS
the material.
Handling and Storage: MAINTAIN GOOD HOUSE
EMERGENCY AND FIRST AID PROCEDURES: KEEPING PROCEDURES TO PREVENT
inhalation- if symptoms of pulmonary involvement ACUMULATION OF DUST; USE CLEAN-UP
develop, remove from exposure and seek medical METHODS WHICH MINIMIZE DUST GENERATION
attention; skin contact- if irritation occurs, thoroughly
wash affected area with mild soap and water and Other Precautions:
prevent further contact, contact medical help if WASH THROROUGHLY AFTER HANDLING AND
irritation persists; eye contact- if irritation occurs, BEFORE EATING, SMOKING, AND END OF
flush with copious amounts of a water, contact WORK SHIFT; DO NOT SHAKE CLOTHING TO
medical help if irritation persists; ingestion- if REMOVE DUST; AVOID INHALATION,
substantial quantities are swallowed, give person (if INGESTION, AND DIRECT SKIN CONTACT
conscious) a large quantity of water to drink, induce
Although Rose Mill Company has attempted to provide
vomiting, and seek medical attention; carcinogenic
current and accurate information herein, Rose Mill
assessment- NTP Annual Report, IARC
Company makes no representations regarding the
monographs, et. al.) this material has not been
accuracy or completeness of the information and assumes
identified as a known or suspected carcinogen by
no liability for any loss, damage, or injury of any kind which
NTP, IARC, or OSHA. may result from, or arise out of, the use of or reliance on
the information by any person.
FIRE & EXPLOSION HAZARD DATA
Flash Point: N/A distributed by:
Flammability Limits: N/A Rose Mill Co.
NO FIRE HAZARD, USE EXTINGUISHING AGENTS 100 Brook St.
SUITABLE FOR SURROUNDING FIRE. SPECIAL West Hartford, CT 06110
PROCEDURES: USE A SELF-CONTAINED BREATHING
860.232.9990 ph
APPARATUS TO PREVENT INHALATION OF DUST,
860.232.9995 fx
MIST OR FUMES THAT MAY BE GENERATED DURING
www.RoseMill.com
FIRE FIGHTING ACTIVITIES. NO UNUSUAL FIRE OR
info@RoseMill.com
EXPLOSION HAZARDS.
Bemol_Tung_disulfide_MSDS Revised: 09/08/04 Supersedes: 04/02/04
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