Chemical identity

Tamsulosin EP Impurity D/ Tamsulosin Desmethoxy analog (HCl Salt)

CAS 1798904-07-0 · C19H27ClN2O5S

01Identity

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

Lazychem IDLC-28826
PubChem CID129318734
NameTamsulosin EP Impurity D/ Tamsulosin Desmethoxy analog (HCl Salt)
CAS RN1798904-07-0
Molecular formulaC19H27ClN2O5S
Molecular weight430.95 g/mol
IUPAC name2-Methoxy-5-[(2R)-2-[(2-phenoxyethyl)amino]propyl]-benzenesulfonamide Hydrochloride
InChIKeyUVWZZLJTGVGLAO-PFEQFJNWSA-N

02Structure identifiers

2D structurePubChem CID 129318734
Two-dimensional chemical structure of Tamsulosin EP Impurity D/ Tamsulosin Desmethoxy analog (HCl Salt), CAS 1798904-07-0
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, has 1 defined stereocentre, contains at least one halogen atom. These statements are calculated from the published structure string.

Defined stereocentres1
Unassigned stereocentres0
Ring count2
Secondary amines1
Tertiary amines0
N-methyl amine sites0
SMILESC[C@H](CC1=CC(=C(C=C1)OC)S(=O)(=O)N)NCCOC2=CC=CC=C2OC.Cl
InChINot listed
Formula from structureC19H27ClN2O5S
Molecular weight from structure430.95 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

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.

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 Tamsulosin EP Impurity D/ Tamsulosin Desmethoxy analog (HCl Salt) 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 Tamsulosin EP Impurity D/ Tamsulosin Desmethoxy analog (HCl Salt), 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
C19H26ClN3O6S
Candidate SMILES
COc1ccccc1OCCN(N=O)[C@H](C)Cc1ccc(OC)c(S(N)(=O)=O)c1.Cl

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 1798904-07-0 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 1798904-07-0 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

Tamsulosin

View API and impurity family

Other names

  • Tamsulosin EP Impurity D(HCl Salt)
  • (R)-2'-O-Desethyl-2'-O-desmethyl Tamsulosin Hydrochloride
  • Desethyl-2'-O-desmethyl Tamsulosin hydrochloride
  • Tamsulosin Desmethoxy Impurity
  • (Impurity)
  • 1798904-07-0
  • 2-methoxy-5-[(2R)-2-[2-(2-methoxyphenoxy)ethylamino]propyl]benzenesulfonamide
  • hydrochloride
  • Tamsulosin EP Impurity D HCl
  • (R)-2'-O-Desethyl-2'-O-desmethyl Tamsulosin Hydrochloride(Impurity)
  • CID 129318734
  • 2-Methoxy-5-[(2R)-2-[[2-(2-methoxyphenoxy)ethyl]amino]propyl]benzenesulfonamide hydrochloride

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