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phthalaldehyde

CAS No.: 643-79-8      Formula: C8H6O2

Weight: 134.13200

Synonyms: 1,2-Benzenedicarboxaldehyde; o-Phthalaldehyde;




Description

o-Phthalaldehyde or ortho-phthalaldehyde (OPA) is the chemical compound with the formula C6H4(CHO)2. Often abbreviated OPA, the molecule is a dialdehyde, consisting of two formyl (CHO) groups attached to adjacent carbon centres on a benzene ring. This pale yellow solid is a building block in the synthesis of heterocyclic compounds and a reagent in the analysis of amino acids. OPA dissolves in water solution at pH < 11.5. Its solutions degrade upon UV illumination and exposure to air.

Basic Information
CAS No.:
643-79-8
Synonyms:
1,2-Benzenedicarboxaldehyde; o-Phthalaldehyde;
Formula:
C8H6O2
Molecular Weight:
134.13200
PSA:
34.14000
LogP:
1.31160
Properties
Appearance & Character:
Light yellow crystalline powder
Density:
1.13
Melting Point:
55-58 °C(lit.)
Boiling Point:
83-84 °C (0.7501 mmHg)
Flash Point:
>230 °F
Storage Conditions:
2-8ºC
Safety Info
Symbol:
GHS05 GHS06 GHS09
Signal Word:
Dangerous
Hazard Statement:
H301; H314; H317; H400
Warning Statement:
P273; P280; P301 + P310; P305 + P351 + P338; P310
Customs Code:
2912299000
WGK Germany:
3
Hazard Category Code:
R25; R34; R43
Security Instructions:
S26-S28-S36-S45-S36/37/39-S61
Dangerous Goods Sign:
T