17-Hydroxypregnenolone (also 17-OH-pregnenolone and 17α-hydroxypregnenolone), is a C21 steroid that is obtained by hydroxylation of pregnenolone at the C17α position. This step is performed by the mitochondrial cytochrome P450 enzyme 17α-hydroxylase (CYP17A1) that is present in the adrenal and gonads. Peak levels are reached in humans at the end of puberty and then decline. High levels are also achieved during pregnancy.

CAS：387-79-1
中文别名：17-羟基孕尿烯酮;3Β,17Α-二羟基-5-孕烯-20酮;17a-羟基孕烯醇酮;
英文别名：17A-HYDROXY PREGNENOLONE;5-Pregnen-3.β.,17.α.-diol-20-one;17A-HYDROXYPREGENOLONE;17alpha-Hydroxy;17-Hydroxy Pregnenolone;17alpha-hydroxypregnenolone;17a-Hydroxypregnolone;HYDROXYPREGNENOLONE,17A;17ALPHA-HYDROXYPREGNENOLONE;17-OH PREG;Hydroxypregnenolone;17-OH-pregnenolone;
分子式：C21H32O3
分子量：332.477
精确质量：332.235
Psa：57.53
Logp：3.6302

EINECS号：206-862-6

密度：1.15g/cm3
沸点：478.4ºC at 760 mmHg
闪点：257.2ºC
折射率：1.567
蒸汽压：3.69E-11mmHg at 25°C