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(5a)-Cholestane

Also known as: (5A)-CHOLESTANE, (5R,8R,9S,10S,13R,14S,17R)-10,13-Dimethyl-17-[(2R)-6-methyl-2-heptanyl]hexadecahydro-1H-cyclopenta[a]phenanthren, (5R,8R,9S,10S,13R,14S,17R)-10,13-Dimethyl-17-[(2R)-6-methyl-2-heptanyl]hexadecahydro-1H-cyclopenta[a]phenanthrene, (5R,8R,9S,10S,13R,14S,17R)-10,13-Diméthyl-17-[(2R)-6-méthyl-2-heptanyl]hexadécahydro-1H-cyclopenta[a]phénanthrène, (5α)-Cholestane, 10,13-Dimethyl-17-(1',5'-dimethylhexyl)-hexadecahydrocyclopenta(a)phenanthrene, 28,29,30-TRINORLANOSTANE, 28,29,30-Trinorlanostane, 5-α-cholestane, 5A-Cholestane, TMS, 5ALPHA-CHOLESTANE, 5α-Cholestane, 5α-Cholestane (8CI), 5α-cholestane, ALPHA, ALPHA, ALPHA 20R-CHOLESTANE, Cholestane, (5α)-, EINECS 207-562-8, MFCD00066412, alpha-Cholestane

(5a)-Cholestane (CAS 481-21-0) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C27H48 and a molecular weight of 372.670 g/mol. Key properties include a melting point of 78-80 °C, a boiling point of 440.9±12.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 210.3±13.1 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
481-21-0
Jingsj CID
J-28242-8
Molecular Formula
C27H48
Molecular Weight
372.670 g/mol
Category
Aliphatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Melting Point78-80 °C
Boiling Point440.9±12.0 °C at 760 mmHg
Density0.9±0.1 g/cm3
Flash Point210.3±13.1 °C
Exact Mass372.375610
LogP12.26
Vapor Pressure0.0±0.5 mmHg at 25°C
Refractive Index1.492

GHS Safety & Compliance

Acute Toxicity / Health HazardSignal word: Danger
  • H302 — Harmful if swallowed
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H331 — Toxic if inhaled
  • H336 — May cause drowsiness or dizziness
  • H351 — Suspected of causing cancer
  • H372 — Causes damage to organs through prolonged exposure

Frequently Asked Questions

What is the CAS number of (5a)-Cholestane?

The CAS number of (5a)-Cholestane is 481-21-0.

What are the molecular formula and molecular weight of (5a)-Cholestane?

(5a)-Cholestane has molecular formula C27H48 and molecular weight 372.670 g/mol.

Is (5a)-Cholestane hazardous?

(5a)-Cholestane has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

What are the upstream and downstream products of (5a)-Cholestane?

For (5a)-Cholestane, Upstream Products: 5α-Cholestan-3-one.

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

Last updated:

How to cite: Jingsj. "(5a)-Cholestane (CAS 481-21-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-28242-8 (accessed 2026-11-07).

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