Chemical identity

Aspartame EP Impurity B / L-α-Aspartyl-L-phenylalanine

CAS 13433-09-5 · C13H16N2O5

01Identity

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

Lazychem IDLC-06875
PubChem CID93078
NameAspartame EP Impurity B / L-α-Aspartyl-L-phenylalanine
CAS RN13433-09-5
Molecular formulaC13H16N2O5
Molecular weight280.28 g/mol
IUPAC nameL-aspartyl-L-phenylalanine
InChIKeyYZQCXOFQZKCETR-UWVGGRQHSA-N

02Structure identifiers

2D structurePubChem CID 93078
Two-dimensional chemical structure of Aspartame EP Impurity B / L-α-Aspartyl-L-phenylalanine, CAS 13433-09-5
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 1 ring, includes aromatic atoms, includes aliphatic carbon, has 2 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres2
Unassigned stereocentres0
Ring count1
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC1=CC=C(C=C1)C[C@@H](C(=O)O)NC(=O)[C@H](CC(=O)O)N
InChINot listed
Formula from structureC13H16N2O5
Molecular weight from structure280.28 g/mol

03Stereochemistry

The published structure contains 2 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres2Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 4Before 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 13433-09-5 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 13433-09-5 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

Aspartame

View API and impurity family

Other names

  • Aspartame EP Impurity B
  • Aspartame Impurity B (L-aspartyl-L-phenylalanine)
  • L-Aspartyl-L-phenylalanine
  • 13433-09-5
  • Aspartyl-phenylalanine
  • N-L-alpha-aspartyl-L-PhenylAlanine
  • DTXSID20928570
  • (3S)-3-amino-4-[[(1S)-1-carboxy-2-phenylethyl]amino]-4-oxobutanoic acid
  • RefChem:114637
  • DTXCID801357335
  • 236-557-3
  • H-ASP-PHE-OH

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