Carbonic acid, sodium salt, hydrate (232)
Trona
Natural sodium sesquicarbonate
C2H5Na3O8 / Na2CO3•NaHCO3•2H2O
Molecular mass: 226.0
ICSC # 1511
CAS # 6106-20-3
RTECS # FG2099000
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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.
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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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•Inhalation
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Cough.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
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•Skin
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Redness.
Dry skin.
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Protective gloves.
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Rinse skin with plenty of water or shower.
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•Eyes
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Redness.
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Safety goggles.
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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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Do not eat, drink, or smoke during work.
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Rinse mouth.
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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.
Wash away remainder with plenty of water.
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Separated from
acids.
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Important Data
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Physical State; Appearance:
SOLID IN VARIOUS FORMS
Physical Dangers:
Chemical Dangers:
The solution in water is a weak base.
Reacts
with
acids
.
Occupational Exposure Limits:
TLV not established.
MAK not established.
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Routes of Exposure:
Inhalation Risk:
A nuisance-causing concentration of airborne particles can be reached quickly especially if powdered.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
,
the skin
and
the respiratory tract
.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact with skin may cause dermatitis.
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Physical
Properties
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Melting point (decomposes): >70°C
Density: 2.1
g/cm3
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Solubility in water, g/100 ml at 20°C: 16
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Environmental
Data
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N O T E S
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ADDITIONAL INFORMATION
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ICSC: 1511
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SODIUM SESQUICARBONATE DIHYDRATE
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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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