Isocrotonic acid (or quartenylic acid) is the cis analogue of crotonic acid. It is an oil, possessing a smell similar to that of brown sugar. It boils at 171.9 °C, concomitant with conversion into crotonic acid. Isomerizaton is complete when the cis acid is heated to 170–180 °C in a sealed tube.

CAS：503-64-0
中文别名：
英文别名：(Z)-2-butenic acid;cis,cis-Octadeca-6,11-diensaeure-methylester;I-Dihydrocitrat;6,11-Octadecadienoic acid,methyl ester,(Z,Z);clomifen citrate;2-Butenoic acid, (Z)-;(Z)-buten-2-enoic acid;cis-6,cis-11-Methyl-octadecadienoat;cis-Crotonic acid;Methyl-cis,cis-octadeca-6,11-dienoat;cis-cis-6,11-Octadecadiensaeure-methylester;clomphencitrate;(2Z)-2-Butenoic acid;cis-clomiphene citrate;zuclomiphene citrate;(Z)-but-2-enoic acid;
分子式：C4H6O2
分子量：86.0892
精确质量：86.0368
Psa：37.3
Logp：0.6471

EINECS号：207-973-2

密度：1.039g/cm3
沸点：177ºC at 760mmHg
熔点：12.5-14ºC
闪点：81.6ºC
折射率：1.448

海关编码：2916190090

生产方法
1.制法: 1,3-二溴-2-丁酮