C28H44O
396.6 g/mol
APIDanger
Provitamin D2
CAS57-87-4EC200-352-7
Category
API
Compound Class
Steroid
Primary Use
Pharmaceutical Raw Material
Ergosterol is a phytosterol that serves as the most important provitamin D, typically obtained from yeast. It is used in the commercial production of vitamin D2 and cortisone.
Provitamin D and vitamin D2 productionPharmaceutical manufacturing intermediate for cortisone
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Referencesame scaffold
7-dehydrocholesterol
CAS434-16-2
pharmaceutical intermediate
Referencesame scaffold
25-hydroxy-7-dehydrocholesterol
CAS22145-68-2
pharmaceutical raw material
Referencesame scaffold
Cholesta-5,7-dien-3beta-ol-d7
CAS388622-58-0
research compound
Safety Reference
Danger
H300Fatal if swallowed
H413May cause long lasting harmful effects to aquatic life
Customs Tariff Classification
The international HS code for Provitamin D2 (CAS 57-87-4) is 2936.90.
HS code (international, 6-digit)
2936.90
EU CN code (8-digit)
2936 90 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
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
InChIKey
DNVPQKQSNYMLRS-APGDWVJJSA-N
SMILES
C[C@H](/C=C/[C@H](C)C(C)C)[C@H]1CC[C@@H]2[C@@]1(CC[C@H]3C2=CC=C4[C@@]3(CC[C@@H](C4)O)C)C
Synonyms (48)
- ERG
- Ergocalciferol EP Impurity B
- Ergosterol, European Pharmacopoeia (EP)
- Ergosterol, United States Pharmacopeia (USP)
- 5,7,22-Ergostatrien-3beta-ol
- D2, Pro-Vitamin
- ERGOCALCIFEROL IMPURITY B
- Ergosta-5,7,22-trien-3beta-ol
- Ergosterin
- Ergosterin(Standard)
- Ergosterol
- Ergosterol (Provitamin D2)
- Ergosterol (Standard)
- Ergosterol CRS
- Ergosterol, >=95.0% (HPLC)
- Lumisterol Impurity 2
- Provitamin D2
- Provitamine D2
- ergosta-5,7,22-trien-3-ol
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