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NIOSH

MOLYBDENUM

ICSC: 1003

Mo
Atomic mass: 95.9
ICSC # 1003 		CAS # 7439-98-7
RTECS # QA4680000
UN # 3089
October 10, 2006 Validated

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.
Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.

EXPOSURE
PREVENT DISPERSION OF DUST!

•INHALATION Cough.
Local exhaust or breathing protection.
Fresh air, rest.
•SKIN
Protective gloves.
Rinse skin with plenty of water or shower.
•EYES Redness.
Safety spectacles
Rinse with plenty of water (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

STORAGE

PACKAGING & LABELLING

Personal protection: P2 filter respirator for harmful particles. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Separated from strong oxidants, halogens and strong acids.

UN Hazard Class: 4.1
UN Packing Group: II; III
ICSC: 1003 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

MOLYBDENUM

ICSC: 1003

I

M

P

O

R

T

A

N

T


D

A

T

A

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 causing fire hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 mg/m3
(Inhalable fraction),
3 mg/m3
(Respirable fraction)
as TWA; (ACGIH 2006).
MAK: IIb (not established but data is available) (DFG 2006).


ROUTES OF EXPOSURE:


INHALATION RISK:


EFFECTS OF SHORT-TERM EXPOSURE:
See Notes.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
See Notes.

PHYSICAL
PROPERTIES

Boiling point: 4612°C
Melting point: 2617°C
Density: 10.2
g/cm3
Solubility in water: none.

ENVIRONMENTAL
DATA


N O T E S

Health effects of exposure to the substance have not been investigated adequately. Environmental effects from the substance have not been investigated.
Transport Emergency Card: TEC (R)-41GF3-II+III

ADDITIONAL INFORMATION



ICSC: 1003 MOLYBDENUM
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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