IPCS INCHEM Home
OXALIC ACID DIHYDRATEICSC: 0707
November 2009
CAS #: 6153-56-6Ethanedioic acid dihydrate
UN #: 3261
EINECS #: 205-634-3

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Gives off irritating or toxic fumes (or gases) in a fire.    NO open flames.    Use water spray, powder, foam, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat. Burning sensation. Shortness of breath. Laboured breathing. Headache.  Use ventilation (not if powder), local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer immediately for medical attention. 
Skin Redness. Pain. Skin burns.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower for at least 15 minutes. Refer for medical attention . 
Eyes 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. 
Ingestion 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. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
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. 

According to UN GHS Criteria

correxcl mark;warn
DANGER
Harmful if swallowed
Causes severe skin burns and eye damage
May cause respiratory irritation 

Transportation
UN Classification
UN Hazard Class: 8; UN Pack Group: III 

STORAGE
Separated from strong oxidants and food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs. 
OXALIC ACID DIHYDRATE ICSC: 0707
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS CRYSTALS. 

Physical dangers
No data. 

Chemical dangers
Decomposes on contact with hot surfaces or flames. This produces formic acid and carbon monoxide. The solution in water is a medium strong acid. Reacts violently with strong oxidants. This generates fire and explosion hazard. Reacts with some silver compounds. This produces explosive silver oxalate. Attacks some forms of plastic. 

Formula: C2H2O4 . 2 H2O / (COOH)2 . 2 H2O
Molecular mass: 126.1
Melting point: 101-102 °C
See Notes.
Density: 1.65 g/cm³
Solubility in water, g/100ml at 20°C: 13-14
Octanol/water partition coefficient as log Pow: -0.81  


EXPOSURE & HEALTH EFFECTS

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. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. The substance may cause effects on the calcium balance after ingestion. Exposure at high levels could cause death. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. Exposure may result in kidney stones, slow-healing ulcers and black finger nails. 


Occupational exposure limits
TLV: 1 mg/m3, ppm, as TWA; 2 mg/m3 as STEL.
EU-OEL: 1 mg/m3 as TWA 

ENVIRONMENT
 

NOTES
The apparent melting point caused by loss of crystal water is given.
The substance can be dehydrated by careful drying at 100 °C, but considerable loss occurs through sublimation.
See ICSC 0529. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 21/22; S: (2)-24/25 

All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.
    See Also:
       Toxicological Abbreviations