Chemical identity

Acetylcysteine EP Impurity D/ N,S-diacetyl-L-cysteine/ Acetylcysteine Related Compound D

CAS 18725-37-6 · C7H11NO4S

01Identity

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

Lazychem IDLC-04804
PubChem CID65690
NameAcetylcysteine EP Impurity D/ N,S-diacetyl-L-cysteine/ Acetylcysteine Related Compound D
CAS RN18725-37-6
Molecular formulaC7H11NO4S
Molecular weight205.23 g/mol
IUPAC name(2R)-2-(acetylamino)-3-(acetylsulfanyl)propanoic acid
InChIKeyHSPYGHDTVQJUDE-LURJTMIESA-N

02Structure identifiers

2D structurePubChem CID 65690
Two-dimensional chemical structure of Acetylcysteine EP Impurity D/ N,S-diacetyl-L-cysteine/ Acetylcysteine Related Compound D, CAS 18725-37-6
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure is acyclic, includes aliphatic carbon, has 1 defined stereocentre. These statements are calculated from the published structure string.

Defined stereocentres1
Unassigned stereocentres0
Ring count0
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCC(=O)N[C@@H](CSC(=O)C)C(=O)O
InChINot listed
Formula from structureC7H11NO4S
Molecular weight from structure205.23 g/mol

03Stereochemistry

The published structure contains 1 defined and 0 unassigned tetrahedral stereocentre. The exact wedge and dash depiction is shown above.

Defined centres1Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 2Before symmetry reduction

Published same-connectivity configurations

1 record

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.

No additional structure-linked configuration with the same connectivity is currently present in the LazyChem dataset.

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 18725-37-6 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 18725-37-6 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

Acetylcysteine

View API and impurity family

Other names

  • Acetylcysteine EP Impurity D
  • N,S-Diacetylcysteine
  • (R)-2-acetamido-3-(acetylthio)propanoic acid
  • N-Acetyl-L-cysteine, acetate (ester)
  • Mucothiol
  • Dacisteine
  • Acetylcysteine Related Compound D/ N,S-diacetyl-L-cysteine
  • 18725-37-6
  • Dacisteina
  • Dacisteinum
  • WF970ATW3T
  • DTXSID00172034

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