Benzopyran is an polycyclic organic compound that results from the fusion of a benzene ring to a heterocyclic pyran ring. According to IUPAC nomenclature it is called chromene. There are two isomers of benzopyran that vary by the orientation of the fusion of the two rings compared to the oxygen, resulting in 1-benzopyran (chromene) and 2-benzopyran (isochromene)-the number denotes where the oxygen atom is located by standard naphthalene-like nomenclature.

CAS：254-04-6
中文别名：
英文别名：Benzopyran;2H-1-Benzopyran;2H-Chromene;chromene;1-benzopyran;1,2-Chromene;3-Chromene;2H-1-BENZOPYRAN;1,2-Benzopyran;
分子式：C9H8O
分子量：132.159
精确质量：132.058
Psa：9.23
Logp：2.0922

MDL号：MFCD01662267

密度：1.095g/cm3
沸点：220.2ºC at 760mmHg
闪点：79.7ºC
折射率：1.571
蒸汽压：0.169mmHg at 25°C

海关编码：2901299090