Molybdic acid, disodium salt
Disodium molybdate
Na2MoO4
Molecular mass: 205.9
ICSC # 1010
CAS # 7631-95-0
RTECS # QA5075000
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible under specific conditions.
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NO open flames.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Risk of fire and explosion on contact with molten magnesium.
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Exposure
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AVOID ALL CONTACT!
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•Inhalation
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Cough.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
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Safety goggles,
or eye protection in combination with breathing protection if powder.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Nausea.
Vomiting.
Diarrhoea.
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Do not eat, drink, or smoke during work.
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Give plenty of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into covered containers.
Personal protection: P2 filter respirator for harmful particles.
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Separated from
strong oxidant,
halogens
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Important Data
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Physical State; Appearance:
WHITE
POWDER
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
producing toxic fumesincluding fumes of sodium oxide.
Reacts
violently with
halogens
causing fire and explosion hazard.
Occupational Exposure Limits:
TLV: (as Mo, soluble compounds, respirable fraction) 0.5 mg/m3 as TWA; A3 (confirmed animal carcinogen with unknown relevance to humans); (ACGIH 2004).
MAK: IIb (not established but data is available) (DFG 2004).
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation.
Inhalation Risk:
A harmful concentration of airborne particles can be reached quickly when dispersed.
Effects of Short-Term Exposure:
The aerosol
is irritating to
the respiratory tract
and
the eyes
.
Effects of Long-Term or Repeated Exposure:
The substance may have effects on the respiratory tract.
This substance is possibly carcinogenic to humans.
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Physical
Properties
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Melting point: 687°C
Density: 3.78
g/cm3
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Solubility in water, g/100 ml at 100°C: 84
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Environmental
Data
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N O T E S
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Environmental effects from the substance have not been investigated adequately.
Card has been partly updated in April 2005. See section Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 1010
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SODIUM MOLYBDATE
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(C) IPCS, CEC, 1994
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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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