CAS 144-62-7: Oxalic Acid (C2H2O4)

Identity

CAS Number	144-62-7
Molecular Formula	C2H2O4
IUPAC Name	ethanedioic acid
Molecular Weight	90.03 g/mol
SMILES	`OC(=O)C(=O)O`
Synonyms	ethanedioic acid, wood bleach, oxalic acid dihydrate

2D Structure

Physical Properties

Density	1.9 g/mL at 25°C
Boiling Point	365.0°C
Melting Point	189.5°C
Flash Point	166.0°C
Vapor Pressure	0.001 kPa at 20°C
Refractive Index	nD = 1.54
Dielectric Constant	ε = 6.8

Safety & GHS Classification

GHS05Irritant

H302: Harmful if swallowed
H312: Harmful in contact with skin
H318: Causes serious eye damage

Storage: Store in cool, dry place away from bases and oxidizers. Toxic if ingested — keep away from food. Use gloves when handling. Decomposes at melting point releasing CO and CO2.