C5H7NO3
129.11 g/mol
Pharmaceutical IntermediateWarning
D-Pyroglutamic acid
CAS4042-36-8EC223-735-0
Category
Pharmaceutical Intermediate
Compound Class
Organic Acid
Primary Use
Pharmaceutical Intermediate
D-Pyroglutamic acid is a chiral derivative of the natural amino acid pyroglutamic acid, formed by the cyclization of glutamic acid. It serves as a pharmaceutical intermediate in the synthesis of various compounds.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
SimilarStructure SimilarSimilarity 0.76
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pharmaceutical intermediate
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4-Methoxypiperidine
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pharmaceutical intermediate
Referencestereoisomer of
Magnesium pidolate
CAS62003-27-4
pharmaceutical raw material
Referencestereoisomer of
(S)-pyroglutamic acid
CAS98-79-3
food additive and antioxidant
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for D-Pyroglutamic acid (CAS 4042-36-8) is 2933.79.
HS code (international, 6-digit)
2933.79
EU CN code (8-digit)
2933 79 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(2R)-5-oxopyrrolidine-2-carboxylic acid
InChIKey
ODHCTXKNWHHXJC-GSVOUGTGSA-N
SMILES
C1CC(=O)N[C@H]1C(=O)O
Synonyms (25)
- (+)-Pidolic acid
- (+)-Pyroglutamic acid
- (R)-pyroglutamic acid
- 5-oxo-D-proline
- D-5-Oxoproline
- D-Glutamic Acid Lactam
- D-Pidolic acid
- D-Proline, 5-oxo-
- D-Pyr-OH
- D-PyroGlu
- D-Pyroglutamic acid
- H-D-Pyr-OH
- Proline, 5-oxo-, D-
- RecPGA 100k
- RecPGA 373K
- Vonoprazan Impurity 289
- pyroglutaminsaure
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