Nitrous acid, sodium salt
NaNO2
Molecular mass: 69.0
ICSC # 1120
CAS # 7632-00-0
RTECS # RA1225000
UN # 1500
EC # 007-010-00-4
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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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Not combustible but enhances combustion of other substances.
Many reactions may cause fire or explosion.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO contact with combustible substances.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Blue lips or finger nails.
Blue skin.
Confusion.
Convulsions.
Dizziness.
Headache.
Nausea.
Unconsciousness.
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Local exhaust or breathing protection.
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Fresh air, rest.
Artificial respiration if indicated.
Refer for medical attention.
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•Skin
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Protective gloves.
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First rinse with plenty of water, then remove contaminated clothes and rinse again.
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•Eyes
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Redness.
Pain.
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Safety spectacles.
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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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Rapid pulse.
(See Inhalation).
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Do not eat, drink, or smoke during work.
Wash hands before eating.
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Induce vomiting (ONLY IN CONSCIOUS PERSONS!).
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 containers; if appropriate, moisten first to prevent dusting.
Carefully collect remainder,
then remove to safe place.
Do NOT let this chemical enter the environment.
(Extra personal protection: P3 filter respirator for toxic particles).
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Separated from
combustible and reducing substances,
acids.
Dry.
Well closed.
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O symbol
T symbol
N symbol
R: 8-25-50
S: 1/2-45-61
UN Hazard Class: 5.1
UN Subsidiary Risks: 6.1
UN Packing Group: III
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Important Data
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Physical State; Appearance:
HYGROSCOPIC
,
WHITE
TO YELLOW
SOLID IN VARIOUS FORMS
Physical Dangers:
Chemical Dangers:
May explode on heating above 530°C.
The substance decomposes
on contact with
acids
producing
toxic fumes
(
nitrogen oxides
).
The substance is a strong oxidant and reacts with combustible and reducing materials causing fire and explosion hazard.
The solution in water is a weak base.
Reacts
with
aluminium
,
ammonium compounds,
amines
.
Occupational Exposure Limits:
TLV not established.
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol and
by ingestion.
Inhalation Risk:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
.
The substance may cause effects on the
cardiovascular system
and
blood
, resulting in lower blood pressure and
the formation of methaemoglobin.
Exposure may result in death.
The effects may be delayed.
Medical observation is indicated.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Decomposes below boiling point at 320°C
Melting point (decomposes): 280°C
Density: 2.2
g/cm3
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Solubility in water, g/100 ml at 20°C: 82
Octanol/water partition coefficient as log Pow: -3.7
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Environmental
Data
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The substance is toxic to aquatic organisms.
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N O T E S
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Rinse contaminated clothes (fire hazard) with plenty of water.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
Depending on the degree of exposure, periodic medical examination is indicated.
Transport Emergency Card: TEC (R)-51G02
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ADDITIONAL INFORMATION
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ICSC: 1120
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SODIUM NITRITE
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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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