Specification of Oxalic Acid

CAS NO.   

144-62-7 (Anhydrous), 6153-56-6 (Dihydrate)

EINECS NO. 

205-634-3

Formula

HOOCCOOH·2H2O

Mol Wt.

126.07

Physical and Chemical Properties

Physical State 

white crystals

Melting Point

101 - 102 °C

Boiling Point  

 149 - 160 °C (sublimes)

Specific Gravity

1.6 - 1.7

Solubility In Water

1 g/7ml

Vapor Density   

4.4

Flash Point  

 163 °C

Stability  

Stable under ordinary conditions

Total Acidity

99.5% min

Ash   

0.1% max

Iron     

0.02% max

Loss On Ignition

0.08% max

Sulfate 

0.1% max

Chloride    

20ppm max

Heavy Metal

10ppm max