17α-Hydroxypregnenolone

Also known as: 17-Hydroxypregnenolone, 17-OH Pregnenolone, 17-OH PREG, 3β,17α-Dihydroxy-5-pregnen-20-one, 5-Pregnene-3β,17α-diol-20-one, NSC63853, 17a-Hydroxypregnolone, 17alpha-Hydroxypregnenolone, (3β)-3,17-dihydroxypregn-5-en-20-one, 17α-Hydroxypregnenolone (IUPAC)

17α-Hydroxypregnenolone (CAS 387-79-1) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C21H32O3 and a molecular weight of 334.493 g/mol. Key properties include a melting point of 273℃, a boiling point of 468.1±40.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 251.0±23.8 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H301 — Toxic if swallowed and H311 — Toxic in contact with skin. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 387-79-1
Jingsj CID: J-1451961-0
Molecular Formula: C₂₁H₃₂O₃
Molecular Weight: 334.493 g/mol
Category: Alcohols
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	273℃
Boiling Point	468.1±40.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	251.0±23.8 °C
Exact Mass	334.250793
PSA	57.53000
LogP	3.46
Vapor Pressure	0.0±2.6 mmHg at 25°C
Refractive Index	1.540
Storage Conditions	?20°C

GHS Safety & Compliance

Flammable / Acute Toxicity / Health HazardSignal word: Danger

H225 — Highly flammable liquid and vapour
H301 — Toxic if swallowed
H311 — Toxic in contact with skin
H331 — Toxic if inhaled
H370 — Causes damage to organs

Activity & Biological Data

Target	Human Endogenous Metabolite

Frequently Asked Questions

What is the CAS number of 17α-Hydroxypregnenolone?

The CAS number of 17α-Hydroxypregnenolone is 387-79-1.

What are the molecular formula and molecular weight of 17α-Hydroxypregnenolone?

17α-Hydroxypregnenolone has molecular formula C21H32O3 and molecular weight 334.493 g/mol.

Is 17α-Hydroxypregnenolone hazardous?

17α-Hydroxypregnenolone has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H301 — Toxic if swallowed; H311 — Toxic in contact with skin.

What are the upstream and downstream products of 17α-Hydroxypregnenolone?

For 17α-Hydroxypregnenolone, Upstream Products: 16,17-Epoxypregnenolone, 17α-Acetoxypregnenolone, 17α-Hydroxyprogesterone; Downstream Products: 17α-Hydroxyprogesterone, Androstenedione, Cortodoxone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "17α-Hydroxypregnenolone (CAS 387-79-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1451961-0 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.