1H-2-Benzopyran-1,3(4H)-dione cas no:703-59-3
Synonyms: 1,3-Isochromandione(7CI);o-Toluic acid, a-carboxy-, cyclic anhydride (8CI);1H-Isochromene-1,3(4H)-dione;Benzeneacetic acid, 2-carboxy-, cyclic anhydride;Homophthalic acid anhydride;Homophthalic anhydride;NSC 2825;NSC 401693;
Name1H-2-Benzopyran-1,3(4H)-dione
CAS703-59-3
Synonyms1,3-Isochromandione(7CI);o-Toluic acid, a-carboxy-, cyclic anhydride (8CI);1H-Isochromene-1,3(4H)-dione;Benzeneacetic acid, 2-carboxy-, cyclic anhydride;Homophthalic acid anhydride;Homophthalic anhydride;NSC 2825;NSC 401693;
EINECS(EC#)211-873-4
Molecular FormulaC9H6O3
Molecular Weight162.14
Appearancebeige solid.
refractive index1.584
storage tempRefrigerator (+4°C)
Sensitive Moisture Sensitive
Hazard Xi:Irritant;
Risk R36/37/38
Safety
Hazard Codes: 
Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36:Wear suitable protective clothing.
WGK Germany: 3
F: 10-21
1H-2-Benzopyran-1,3(4H)-dione (CAS NO.703-59-3) hasn't been listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65. And the toxicological properties have not been fully investigated.
