Oxalic acid dihydrate

  • Dicarbolic acid dihydrate
  • Ethanedioic acid dihydrate
Formula
(COOH)2.2H2O
Structure
Description
White, odorless powder.
Uses
Wood bleaching and brightener, stain remover

Registry Numbers and Inventories.
CAS
6153-56-6
EC (EINECS/ELINCS)
205-634-3
EC Index Number
607-006-00-8
EC Class
harmful
R 21/22
RTECS
RO2450000
UN (DOT)
3261
Merck
12,7043
Beilstein/Gmelin
3679436
Beilstein Reference
4-02-00-01819
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C2H2O4 . 2 H2O
Formula mass
126.07
Melting point, °C
101
Vapor pressure, mmHg
2.7 (20 C)
Vapor density (air=1)
4.3
Density
1.65 g/cm3 (20 C)
Solubility in water
14 0 g/L
pKa/pKb
1.38 (pKa)

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Do not get on skin or in eyes. Do not ingest or inhale. Use only in a chemical fume hood.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Avoid generating dusty conditions. Cover with sand, dry lime or soda ash and place in a closed container for disposal. Provide ventilation.
Disposal code
4
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong bases, metals, silver, acid chlorides.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
157
Fire fighting
Extinguish using agent most appropriate for surrounding fire.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: ppm; 1 mg/m3 (ACGIH 1989).
Poison_Class
2 (Very strong toxins)
Exposure effects
Chronic inhalation and ingestion may cause effects similar to those of acute inhalation and ingestion.
   Ingestion
Causes gastrointestinal tract burns. Causes severe pain, nausea, vomiting, diarrhea, and shock. May cause hemorrhaging of the digestive tract. Overexposure can cause hypocalcemia and kidney
   Inhalation
May cause severe irritation of the upper respiratory tract with pain, burns, and inflammation. May cause kidney damage.
   Skin
Contact with skin causes irritation and possible burns, especially if the skin is wet or moist.
   Eyes
Contact with eyes may cause severe irritation, and possible eye burns.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Discard contaminated clothing in a manner which limits further exposure.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
3261
Response guide
Hazard class
8
Packing Group
I; II; III
 
HS Code
2917 11 00