L-Pyroglutamic acid 98-79-3 5-OXO-L-PROLINE;5-oxoproline;5-OXO-2-PYRROLIDINECARBOXYLIC ACID;L-GLUTIMINIC ACID;L-GLUTAMIC ACID LACTAM;(-)-L-PYROGLUTAMIC ACID;L-PYROGLUTAMIC ACID;L-2-PYRROLIDONE-5-CARBOXYLIC ACID
L-Pyroglutamic acid
C5H6NO3 CAS NO:98-79-3
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Pyroglutamic acid (also known as 5-oxoproline, pidolic acid, or pyroglutamate for its basic form) is an uncommon amino acid derivative in which the free amino group of glutamic acid or glutamine cyclizes to form a lactam.
Property |
Standard |
Appearance |
White crystal |
Rotary rate (a)D20 |
-11.0º ~ -12.0º |
Melting Point (ºC) |
159ºC to 162 ºC |
Chlorids (C1) |
<0.02% |
Amonnium salt (NH4 |
<0.02% |
Sulphur salts (SO4 |
<0.02% |
Heavy Metal (Pb) |
<10ppm |
Iron (Fe) |
<10ppm |
Arsenic salt (As2O3) |
<1 PPM |
Drying Loss |
<0.50% |
Burning residues |
<0.2% |
Content |
99.0-101.0% |
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