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  • Product NameL-Pyroglutamic acid
  • Molecular FormulaC5H7NO3
  • Molecular Weight129.115
  • Purity99%
  • Appearancewhite to light yellow crystal powder

Product Details

Quick Details

  • CasNo: 98-79-3
  • Molecular Formula: C5H7NO3
  • Appearance: white to light yellow crystal powder
  • Purity: 99%

Quality products make an important contribution to long-term revenue and profitability. Factory In Bulk Supply Pharma Grade Food Additive L-Pyroglutamic Acid Cas No.98-79-3 Crystalline Powder. Chinese Good Manufacturer Export.

1.What is the L-Pyroglutamic acid ?

L-Pyroglutamic acid (also known as 5-oxoproline) is a naturally occurring amino acid that is commonly found in certain foods, such as dairy products, meat, and vegetables. It is an unusual amino acid in that it contains a cyclic structure formed between the side chain and the amino group.

L-glutamic acid γ-benzyl ester

L-glutamic acid γ-benzyl ester



benzoic acid

benzoic acid

L-Pyroglutamic acid

L-Pyroglutamic acid

benzyl alcohol

benzyl alcohol

Conditions Yield
With sodium hydroxide; sodium tetrachloropalladate(II); In water; Product distribution; Ambient temperature; initial pH:6.8; variation of initial pH and temperature;
L-glutamic acid 5-methyl ester

L-glutamic acid 5-methyl ester



N-formylpyroglutamic acid

N-formylpyroglutamic acid

methyl (S)-pyroglutamate

methyl (S)-pyroglutamate

L-Pyroglutamic acid

L-Pyroglutamic acid

Conditions Yield
With 3,5,5-Trimethylcyclohex-2-en-1-one; at 130 ℃; for 24h; Sealed tube;
21 %Chromat.

2.What is the CAS number for L-Pyroglutamic acid ?

The CAS number of L-Pyroglutamic acid is 98-79-3.

More information of L-Pyroglutamic acid 98-79-3 are:

CAS Number

Physical Description Solid; [Merck Index] White crystalline powder; [Alfa Aesar MSDS]
Hydrogen Bond Donor Count 2
Hydrogen Bond Acceptor Count 3
Exact Mass 129.042593085 g/mol
Complexity 154

Refractive Index

-10 ° (C=5, H2O)
Solubility >19.4 [ug/mL] (The mean of the results at pH 7.4)






3.32(at 25℃)

3.What are another words for L-Pyroglutamic acid ?

Synonyms for L-Pyroglutamic acid 98-79-3:Proline, 5-oxo-;Pyrrolidonecarboxylic acid;2-Pyrrolidinone-5-carboxylic acid;Proline, 5-oxo-, L-;(S)-5-Oxo-2-pyrrolidinecarboxylic acid;2-Pyrrolidone-5-Carboxylicacid;H-PYR-OH;pGlu-OH;L-Pyr-OH;L-Pyro Glutamic Acid;L-pyroglutamate;2-Oxopyrrolidine-5-carboxylic acid;Acido pidolico [INN-Spanish];5-Pyrrolidone-2-carboxylic acid;2-Benzothiazolesulfenic acid morpholide;L-5-Oxo-2-pyrrolidinecarboxylic acid;Pidolic acid [INN];L-Glutamic acid gamma-lactam;(2R)-5-oxopyrrolidine-2-carboxylate;35255-51-7;Acidum pidolicum [INN-Latin];L-Proline, 5-oxo-;CPD-589;2-Benzothiazolesulfenemorpholide;5-Carboxy-2-pyrrolidinone;Acide pidolique [INN-French];L-5-Pyrrolidone-2-carboxylic acid;(-)-2-Pyrrolidone-5-carboxylic acid;L-5-Carboxy-2-pyrrolidinone;(S)-(-)-2-Pyrrolidone-5-carboxylic acid;5-oxo-L-proline;2-L-Pyrrolidone-5-carboxylic acid;

4.What is the molecular formula of L-Pyroglutamic acid?

The chemical formula of  L-Pyroglutamic acid is C5H7NO3 which containing 5 Carbon atoms,7 Hydrogen atoms,1 Nitrogen atoms and 3 Oxygen atoms,and the molecular weight of  L-Pyroglutamic acid is 129.115.

5.What is L-Pyroglutamic acid (98-79-3) used for?

L-Pyroglutamic Acid Cas No.98-79-3 has a number of potential uses. It is sometimes used as a component in cosmetic products due to its hydrating properties, which can help to improve the appearance of skin. Additionally, L-Pyroglutamic acid has been studied for its potential health benefits, including its role as an antioxidant and its ability to support cognitive function. Some studies suggest that L-Pyroglutamic acid may help to protect against oxidative stress, which can contribute to a variety of health issues. It has also been studied for its potential use in treating conditions such as Alzheimer's disease and schizophrenia, although further research is needed in these areas.

IUPAC Name: (2S)-5-oxopyrrolidine-2-carboxylic acid  
Isomeric SMILES: C1CC(=O)N[C@@H]1C(=O)O  
InChI: InChI=1S/C5H7NO3/c7-4-2-1-3(6-4)5(8)9/h3H,1-2H2,(H,6,7)(H,8,9)/t3-/m0/s1  

Relevant articles related to L-Pyroglutamic acid:



Evaluation of Pharmacokinetic Feasibility of Febuxostat/L-pyroglutamic Acid Cocrystals in Rats and Mice

Recently, FBX/L-pyroglutamic acid cocrystal (FBX-PG) was developed with improving 4-fold increase of the FBX solubility.

, JE Yu, BH You, M Bae, SY Han, K Jung, YH Choi - 2023

Molecular Mechanism of L-Pyroglutamic Acid Interaction with the Human Sour Receptor

As a result, it is possible to objectify the change in signal intensity according to the concentration of L-pyroglutamic acid, an active ingredient involved in the taste of kimchi, at the molecular level.

, J Microbiol Biotechnol. 2023 Feb 28; 33(2): 203–210.

6.Factory In Bulk Supply Pharma Grade Food Additive L-Pyroglutamic Acid Cas No.98-79-3 Crystalline Powder.

SICHUAN TONGSHENG AMINOACID CO.LTD is a Chinese good manufacturer of L-Pyroglutamic acid. Our main goal is customer satisfaction. Contact us to negotiate the best price for your business on L-Pyroglutamic acid 98-79-3.


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