Synonyms:

ACETYLENEDICARBOXYLIC ACID FREE ACID;BUTYNEDIOIC ACID ACETYLENE DICARBOXYLIC ACID 99%;Acetylenedicarboxylic acid,98%;Acetylen-dicarbonsαure;But-2-ynedioic acid;2-Butynedioate;NSC-1903;NSC-631597

Canonical SMILES: C(#CC(=O)O)C(=O)O

HS Code: 29171990

Density:1.1794(roughestimate)

Boiling Point:133.5°C(roughestimate)

Refractive Index:1.5260(estimate)

Flash Point: 131°C

Melting Point: 180-187 °C(dec.)(lit.)

Storage: 2-8°C

PKA: pK1:1.75;pK2:4.40(25°C)

Appearance: CrystallinePowderorCrystals

Hazard Codes: T,Xi

Risk Statements:  25-36/37/38

Safety Statements: 26-45-37/39

Transport: UN 2811 6.1/PG 3

WGK Germany: 3

HazardClass: 6.1