ICSC 0529 - OXALIC ACID
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OXALIC ACID
ICSC: 0529
Peer-Review Status: 24.11.2009 Validated
Ethanedioic acid
CAS #: 144-62-7 RTECS #:
RO2450000
UN #: 3261
EC #: 607-006-00-8
EINECS #: 205-634-3
Formula: C2H2O4 / (COOH)2
Molecular mass: 90.0
TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE
Combustible. Gives off irritating or toxic
fumes (or gases) in a fire.
NO open flames.
In case of fire: keep drums, etc.,
cool by spraying with water.
EXPLOSION
PREVENT
DISPERSION OF
DUST!
EXPOSURE
Inhalation
Cough. Sore throat. Burning sensation.
Shortness of breath. Laboured
breathing. Headache.
Use ventilation
(not if powder),
local exhaust or
breathing
protection.
Redness. Pain. Skin burns.
Protective gloves. Remove contaminated clothes.
Protective
Rinse skin with plenty of water or
clothing.
shower for at least 15 minutes.
Refer for medical attention .
Redness. Pain. Blurred vision. Burns.
Wear face shield
or eye protection
in combination
with breathing
protection.
Rinse with plenty of water (remove
contact lenses if easily possible).
Refer immediately for medical
attention.
Sore throat. Burning sensation.
Abdominal pain. Laboured breathing.
Convulsions. Paralysis. Cardiac
dysrhythmia. Shock or collapse.
Do not eat, drink,
or smoke during
work. Wash
hands before
eating.
Rinse mouth. Do NOT induce
vomiting. Refer immediately for
medical attention.
Skin
Eyes
Ingestion
Use water spray, powder, foam,
carbon dioxide.
SPILLAGE DISPOSAL
Personal protection: particulate filter respirator adapted
to the airborne concentration of the substance, protective
gloves and safety goggles. Sweep spilled substance into
covered plastic containers. If appropriate, moisten first to
prevent dusting. Wash away remainder with plenty of
water.
Fresh air, rest. Half-upright
position. Refer immediately for
medical attention.
PACKAGING & LABELLING
Do not transport with food and feedstuffs.
EC Classification
Symbol: Xn; R: 21/22; S: (2)-24/25
UN Classification
UN Hazard Class: 8; UN Pack Group: III
GHS Classification
Signal: Danger
Harmful if swallowed
Causes severe skin burns and eye damage
May cause respiratory irritation
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ICSC 0529 - OXALIC ACID
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EMERGENCY RESPONSE
SAFE STORAGE
NFPA Code: H3; F1; R0.
Separated from strong oxidants and food and feedstuffs.
Dry. Well closed.
IMPORTANT DATA
Physical State; Appearance
HYGROSCOPIC COLOURLESS CRYSTALS OR
WHITE POWDER.
Routes of exposure
The substance can be absorbed into the body by
inhalation of its aerosol and by ingestion. Serious local
effects by all routes of exposure.
Physical dangers
No data.
Inhalation risk
Evaporation at 20°C is negligible; a harmful
concentration of airborne particles can, however, be
Chemical dangers
Decomposes on contact with hot surfaces or flames. This reached quickly when dispersed.
produces formic acid and carbon monoxide. The solution
in water is a medium strong acid. Reacts violently with
Effects of short-term exposure
The substance is corrosive to the eyes, skin and
strong oxidants. This generates fire and explosion
hazard. Reacts with some silver compounds. This
respiratory tract. Corrosive on ingestion. The substance
produces explosive silver oxalate. Attacks some forms of may cause effects on the calcium balance after ingestion.
plastic.
Exposure at high levels could cause death.
Occupational exposure limits
TLV: 1mg/m³ as TWA; (ACGIH 2009).
EU OEL ( selected): 1mg/m³ as TWA;.
Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause
dermatitis. Exposure may result in kidney stones, slowhealing ulcers and black finger nails.
PHYSICAL PROPERTIES
ENVIRONMENTAL DATA
Decomposes: see Notes.
Melting point: 189.5°C
Density (at °C): 1.9 g/cm³
Solubility in water, g/100ml at 20°C: 9-10 (moderate)
Octanol/water partition coefficient as log Pow: -0.81
NOTES
Oxalic acid may sublime at temperatures >100 °C at reduced pressure. Optimal sublimation temperature is 157 °C.
At higher temperatures it partly decomposes.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions
must be available.
Some producers do not classify this substance under UN 3261.
ADDITIONAL INFORMATION
IPCS
International
Programme on
Chemical Safety
LEGAL NOTICE
Prepared in the context of cooperation between the International Programme on
Chemical Safety and the European Commission
© IPCS 2004-2012
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.
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