Ergosterol

Description

Ergosterol · CAS 57-87-4 · C28H44O. UNII Z30RAY509F. Boiling Point: 250 °C at 0.01 mm Hg; Melting Point: 170; Melting Point: 170 °C.

Identification

CAS Registry Number	57-87-4
PubChem CID	444679
Molecular formula	C28H44O
IUPAC name	(3S,9S,10R,13R,14R,17R)-17-[(E,2R,5R)-5,6-dimethylhept-3-en-2-yl]-10,13-dimethyl-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-ol
UNII (FDA)	Z30RAY509F

Computed Descriptors

Molecular Weight	396.6
XLogP3	7.4
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	4
Exact Mass	396.339216023
Monoisotopic Mass	396.339216023
Topological Polar Surface Area	20.2
Heavy Atom Count	29
Formal Charge	0

Physical & Chemical Properties

Boiling Point	250 °C at 0.01 mm Hg
Melting Point	170
Melting Point	170 °C
Solubility	16 mg/mL
Density	1.04

Physical description & handling notes

• Solid; Turns yellow on exposure to light and air; [Merck Index] Hygroscopic solid; [Sigma-Aldrich MSDS]
• Solid
• Small hydrated plates from alcohol, in hydrated needles from ether. The best crystalized form contains 1 1/2 mol H2O
• Platelets from water, alcohol; needles from ethyl ether
• Colorless crystals
• MP: 168 °C. Complete removal from water is almost impossible and results in an amorphous mass, melting range 166-183 °C. ... Precipitated by digitonin. Affected by light and air, turns yellow. Oxygen forms peroxides and hydrogen may form polyhydro compounds.

Regulatory Status

Regulatory & Food Contact	CIR / INCI: Undefined function
GHS notification summary	2.1% (1 / 47)

GHS Hazard Classification

GHS notification summary	2.1% (1 / 47)
Reported hazard statements	H300 (12.8%), H413 (85.1%)

Documented Uses

• Most important provitamin D, usually obtained from yeast; Used as a vitamin; [Merck Index] Used as a vitamin and to make vitamin D2 and cortisone; [HSDB]
• Antirachitic vitamin; when irradiated with UV light, it has vitamin D activity; source of estradiol.
• Used in commercial production of cortisone
• THERAP CAT: Vitamin (antirachitic)
• Ergosterol is an evolutionary precursor of cholesterol and is the major sterol present in lower eukaryotes.
• Cosmetics -> Undefined function

Synonyms

ERGOSTEROL; 57-87-4; Provitamin D2; Ergosterin; Z30RAY509F; (22E)-ergosta-5,7,22-trien-3beta-ol; Ergosta-5,7,22E-trien-3beta-ol; Provitamin D 2; Ergosta-5,7,22-trien-3beta-ol; (22E,24S)-24-methylcholesta-5,7,22-trien-3beta-ol; CHEBI:16933; DTXSID90878679; Pro Vitamin D2; Pro-Vitamin D2; D2, Pro-Vitamin; RefChem:35975

Frequently Asked Questions

What are the CAS number and molecular formula of Ergosterol?

CAS 57-87-4; molecular formula C28H44O; molecular weight — g/mol.

What other names is Ergosterol known by?

ERGOSTEROL, 57-87-4, Provitamin D2, Ergosterin, Z30RAY509F, (22E)-ergosta-5,7,22-trien-3beta-ol.

What is the regulatory status of Ergosterol?

Documented regulatory listings: CIR / INCI: Undefined function.

Is Ergosterol classified as hazardous?

2.1% of GHS notifications report no hazard classification (1 of 47).

What are the key physical properties of Ergosterol?

Boiling Point: 250 °C at 0.01 mm Hg; Melting Point: 170; Melting Point: 170 °C; Solubility: 16 mg/mL.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.