English name: 1,2-Phthalic dicarboxaldehyde
Synonyms: OPA
CAS RN:643-79-8
EINECS number: 211-402-2
Molecular formula: C₈H₆O ₂
Molecular weight: 134.132

Dangerous mark: T:Toxic                             
Risk terminology: R25; R34; R43;
Security Glossary: S26; S36/37/39; S45;
Density: 1.13
Melting point: 54-57 ℃
Boiling point: 83-84 ℃(0.7501 mmHg)
Flashing point: 132℃
Water-solubility: soluble

Application: mainly used in medicine, dyestuff and so on