Chemical identity

Dexamethasone EP Impurity C / 1,2-Dihydro Dexamethasone (Free Base)

CAS 426-17-5 · C22H31FO5

01Identity

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

Lazychem IDLC-12539
PubChem CID22792547
NameDexamethasone EP Impurity C / 1,2-Dihydro Dexamethasone (Free Base)
CAS RN426-17-5
Molecular formulaC22H31FO5
Molecular weight394.48 g/mol
IUPAC name9-fluoro-11β,17,21-trihydroxy-16α-methylpregn-4-ene- 3,20-dione
InChIKeyYYZXYYHUGHQGHI-CXSFZGCWSA-N

02Structure identifiers

2D structurePubChem CID 22792547
Two-dimensional chemical structure of Dexamethasone EP Impurity C / 1,2-Dihydro Dexamethasone (Free Base), CAS 426-17-5
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 8 defined stereocentres, contains at least one halogen atom. These statements are calculated from the published structure string.

Defined stereocentres8
Unassigned stereocentres0
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC[C@@H]1C[C@H]2[C@@H]3CCC4=CC(=O)CC[C@@]4([C@]3([C@H](C[C@@]2([C@]1(C(=O)CO)O)C)O)F)C
InChINot listed
Formula from structureC22H31FO5
Molecular weight from structure394.48 g/mol

03Stereochemistry

The published structure contains 8 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres8Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 256Before symmetry reduction

Published same-connectivity configurations

3 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 426-17-5 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 426-17-5 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

Dexamethasone

View API and impurity family

Other names

  • Dexamethasone EP Impurity C
  • 1,2-Dihydro Dexamethasone

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