Chemical identity

Timolol EP Impurity H/ Timolol BP Impurity H

CAS 158636-97-6 · C13H24N4O3S

01Identity

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

Lazychem IDLC-29685
PubChem CID72941706
NameTimolol EP Impurity H/ Timolol BP Impurity H
CAS RN158636-97-6
Molecular formulaC13H24N4O3S
Molecular weight316.42 g/mol
IUPAC name2-[(2RS)-3-[(1,1-Dimethylethyl)amino]-2-hydroxypropyl]-4-(morpholin-4-yl)-1,2,5-thiadiazol-3(2H)-one
InChIKeyNRTPOFNBMLVPDO-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 72941706
Two-dimensional chemical structure of Timolol EP Impurity H/ Timolol BP Impurity H, CAS 158636-97-6
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 2 rings, includes aromatic atoms, includes aliphatic carbon. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres1
Ring count2
Secondary amines1
Tertiary amines1
N-methyl amine sites0
SMILESCC(C)(C)NCC(CN1C(=O)C(=NS1)N2CCOCC2)O
InChINot listed
Formula from structureC13H24N4O3S
Molecular weight from structure316.42 g/mol

03Stereochemistry

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

Defined centres0Structure assigned
Unassigned centres1Structure unspecified
Assignment statusUnassignedExact 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.

04Possible N-nitroso structures

Shown for structural screening only. These candidates are not confirmed impurities, formation predictions or analytical findings.

Matched amine site1 candidate
Chemical structure of Timolol EP Impurity H/ Timolol BP Impurity H with the matched amine site highlighted in amber
Amber identifies the screened atom and adjacent bonds.
Possible structure candidateUnverified identity
First calculated possible N-nitroso structure derived from Timolol EP Impurity H/ Timolol BP Impurity H, with the new N-nitroso group highlighted in amber
The new N-N=O atoms and bonds are highlighted. No CAS number or compound name is assigned by this calculation.
Candidate 1Possible N-nitroso structural candidate
Calculated formula
C13H23N5O4S
Candidate SMILES
CC(C)(C)N(CC(O)Cn1snc(N2CCOCC2)c1=O)N=O

Interpretation: A structural alert alone does not establish that a nitrosamine forms. Evaluate nitrite sources, amine reagents, pH, temperature, process sequence, purge and analytical evidence.

05India 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 158636-97-6 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 158636-97-6 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.

06Names and relationships

Associated parent compound

Timolol

View associated product family

Other names

  • Timolol EP Impurity H
  • Timolol BP Impurity H

Related records from the same parent family

07Documented 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.

08Sources