Chemical identity

Progesterone EP Impurity B / Progesterone BP Impurity B / (20S)-Dihydro Progesterone

CAS 145-14-2 · C21H32O2

01Identity

Identifiers and names for this exact compound. Empty fields are left unassigned.

Lazychem IDLC-26061
PubChem CID8956
NameProgesterone EP Impurity B / Progesterone BP Impurity B / (20S)-Dihydro Progesterone
CAS RN145-14-2
Molecular formulaC21H32O2
Molecular weight316.48 g/mol
IUPAC name(20S)-20-Hydroxypregn-4-en-3-one
InChIKeyRWBRUCCWZPSBFC-RXRZZTMXSA-N

02Structure identifiers

2D structurePubChem CID 8956
Two-dimensional chemical structure of Progesterone EP Impurity B / Progesterone BP Impurity B / (20S)-Dihydro Progesterone, CAS 145-14-2
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 4 rings, includes aliphatic carbon, has 7 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres7
Unassigned stereocentres0
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC[C@@H]([C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CCC4=CC(=O)CC[C@]34C)C)O
InChINot listed
Formula from structureC21H32O2
Molecular weight from structure316.48 g/mol

03Stereochemistry

The published structure contains 7 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres7Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 128Before symmetry reduction

Published same-connectivity configurations

2 records

These records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

Scope: The mathematical 2^n value is only an upper bound. Symmetry and other stereogenic elements can change the number of distinct stereoisomers. A hypothetical configuration is not published as a compound record without a verified structure identity.

04India status for this compound

These results apply only to this exact compound name and CAS number. Confirm the current official instruments before making a regulatory decision.

NDPS / RCSNO EXACT MATCH FOUNDCAS 145-14-2 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 145-14-2 has no exact match in the reviewed SCOMET list.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

05Names and relationships

Associated parent compound

Progesterone

View API and impurity family

Other names

  • Progesterone EP Impurity B
  • Progesterone BP Impurity B / (20S)-Dihydro Progesterone
  • 20alpha-Dihydroprogesterone
  • 145-14-2
  • 20(S)-Hydroxyprogesterone
  • (20S)-20-Hydroxypregn-4-en-3-one
  • DIHYDROPROGESTERONE
  • 20alpha-Hydroxyprogesterone
  • Pregn-4-en-3-one, 20-hydroxy-, (20S)-
  • 20alpha-Hydroxypregn-4-en-3-one
  • 20alpha-Hydroxydihydroprogesterone
  • (S)-20-Hydroxypregn-4-en-3-one

Related records from the same parent family

06Documented history

Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.

No dated history available

No verified discovery, first report, occurrence, use or issue event is currently available for this identity.

07Sources