Synonyms	(S)-(−)-2-Pyrrolidone-5-carboxylic acid
CAS No.	98-79-3
M.F.	C5H7NO3
M.W.	129.11
Beilstein No.	82132
EC No.	202-700-3
MDL No.	MFCD00005272
PubChem Substance ID	24888086

Appearance	White crystal or crystalline powder
Melting Point (°C)	159-162℃
Specific Rotation (°)	-11.0° to -12.0°
Assay	≥99%
Solubility	DMSO, Methanol
Storage	Room temperature
Application	An amino acid that is used in the synthesis of peptides. It has also been observed to convert when placed at the N-terminus in vivo to create IgG2 antibodies.

Symbol	GHS07
Hazard Statements	H315-H319-H335
Precautionary Statements	P261-P305 + P351 + P338
Hazard Symbols	Xi
Risk Statements	R36/37/38
Safety Statements	S26-36
WGK Germany	3
RTECS	TW3710000

Wirths, O. et al.: J. Biol. Chem., 53, 41517 (2010) Liu, Y.D. et al.: J. Biol. Chem., 286, 11211 (2011)