C27H44O
384.6 g/mol
Pharmaceutical IntermediateDanger
Previtamin D3
CAS1173-13-3EC214-634-2
Category
Pharmaceutical Intermediate
Compound Class
Steroid
Primary Use
Pharmaceutical Intermediate
Previtamin D3 is an intermediate compound formed during the chemical synthesis of cholecalciferol, also known as vitamin D3. It serves as a key precursor in the industrial production of this essential vitamin.
pharmaceutical intermediate for vitamin D3 manufacturing
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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Related Compounds
SimilarStructure SimilarSimilarity 0.82
25-hydroxytachysterol 3
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Safety Reference
Danger
H300Fatal if swallowed
H310Fatal in contact with skin
H330Fatal if inhaled
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for Previtamin D3 (CAS 1173-13-3) is 2906.19.
HS code (international, 6-digit)
2906.19
EU CN code (8-digit)
2906 19 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
(1S)-3-[(Z)-2-[(1R,3aR,7aR)-7a-methyl-1-[(2R)-6-methylheptan-2-yl]-1,2,3,3a,6,7-hexahydroinden-4-yl]ethenyl]-4-methylcyclohex-3-en-1-ol
InChIKey
YUGCAAVRZWBXEQ-WHTXLNIXSA-N
SMILES
CC1=C(C[C@H](CC1)O)/C=C\C2=CCC[C@]3([C@H]2CC[C@@H]3[C@H](C)CCCC(C)C)C
Synonyms (20)
- (6Z)-tacalciol
- Pracholecalciferol
- Precalciferol
- Precalciferol (Previtamin D3)
- Precholecalciferol
- Previtamin D
- Previtamin D3 (>80%)
- previtamin D3
- tachysterol(3)
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