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D-Pyroglutamic Acid
(CAS Number:4042-36-8 Product Number:P1354)


D-Pyroglutamic Acid
Synonym D-Glutamic Acid Lactam
Synonym H-D-Pyr-OH
Synonym (R)-5-Oxopyrrolidine-2-carboxylic Acid
Synonym (R)-2-Pyrrolidone-5-carboxylic Acid

General Information

Product Number P1354

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Purity/Analysis Method >98.0%(T)
Storage Temperature
M.F. / M.W. C5H7NO3=129.12
CAS Number 4042-36-8
Related CAS Number
MDL Number MFCD00066212
  • Product Details
  • Safety & Regulations
  • Reference & Application


Optical purity(LC) min. 99.0 ee%
Purity(Neutralization titration) min. 98.0 %
Melting point 159.0 to 164.0 deg-C
Specific rotation [a]20/D +8.0 to +12.0 deg(C=5, H2O)
Solubility in Water almost transparency

Data of Reference

ee >99.0%(HPLC)


Beilstein 22(5)6,7
Reaxys-RN 82133
PubChem SID 87575440
Merck Index(14) 8001


Signal Word Warning
Hazard Statements
  • H315
  • :Causes skin irritation.
  • H319
  • :Causes serious eye irritation.
Precautionary Statements
  • P264
  • :Wash hands and face thoroughly after handling.
  • P280
  • :Wear protective gloves, eye protection.
  • P302+P352+P332+P313+P362+P364
  • :If on skin: Wash with plenty of soap and water. If skin irritation occurs: Get medical advice or attention. Take off contaminated clothing and wash it before reuse.
  • P305+P351+P338+P337+P313
  • :If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice or attention.

Transport Information

HS Number 2933.79.8500


PubMed Literature

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