IPCS INCHEM Home
MOLYBDENUM
ICSC: 1003
Peer-Review Status: 10.10.2006 Validated
 
CAS #: 7439-98-7 RTECS #: QA4680000
UN #: 3089
EINECS #: 231-107-2
    Formula: Mo
Atomic mass: 95.9

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible under specific conditions.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent deposition of dust.   
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
Inhalation Cough.  Use local exhaust or breathing protection.  Fresh air, rest. 
Skin   Protective gloves.  Rinse skin with plenty of water or shower. 
Eyes Redness.  Wear safety spectacles.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). 
Ingestion   Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Give one or two glasses of water to drink. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.   
EC Classification
 
UN Classification
UN Hazard Class: 4.1; UN Pack Group: II, III 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-41GF3-II+III.  Separated from strong oxidants, halogens and strong acids. 

IMPORTANT DATA
Physical State; Appearance
SILVER-WHITE LUSTROUS METAL OR DARK GREY POWDER. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 

Chemical dangers
Reacts violently with oxidants, halogens and concentrated nitric acid. This generates fire hazard. 

Occupational exposure limits
TLV (inhalable fraction): 10mg/m³ as TWA; (ACGIH 2006).
TLV (respirable fraction): 3mg/m³ as TWA; (ACGIH 2006). 

Routes of exposure
 

Inhalation risk
 

Effects of short-term exposure
See Notes. 

Effects of long-term or repeated exposure
See Notes. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 4612°C
Melting point: 2617°C
Density: 10.2 g/cm³
Solubility in water: none 
 

NOTES
Health effects of exposure to the substance have not been investigated adequately.
Environmental effects from the substance have not been investigated. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations