Synonym(s): Squaric acid
Empirical Formula: C4H2O4
Linear Formula: (HO)2C4(=O)2
Formula Weight: 114.06
MDL Number: MFCD00001334
Purity: 99%
Melting Point: >300 °C(lit.)
Beilstein Registry Number: 774275
Signal Word: Warning
Hazard statements: H315-H317-H319-H335
Precautionary statements: P261-P280-P305 + P351 + P338
Risk Statements (Europe): 36/37/38-43
Safety Statements (Europe): 26-36
Hazard Codes (Europe): Xi