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L-Pyroglutamic acid Structure

L-Pyroglutamic acid

Chemical Properties

Melting point 160-163 °C(lit.)
Boiling point 239.15°C (rough estimate)
alpha  -27.5 º (c=10, 1 N NaOH)
Density  1.3816 (rough estimate)
vapor pressure  0.002Pa at 25℃
refractive index  -10 ° (C=5, H2O)
storage temp.  2-8°C
solubility  H2O: 1 M at 20 °C, clear, colorless
form  Crystalline Powder
pka 3.32(at 25℃)
color  White to off-white
PH 1.7 (50g/l, H2O, 20℃)
Odor wh. crystal, odorless, sl. acidic taste
optical activity [α]20/D 10.5±1°, c = 5% in H2O
Water Solubility  10-15 g/100 mL (20 ºC)
Merck  14,8001
BRN  82132
Stability Stable. Incompatible with bases, acids, strong oxidizing agents.
LogP -1.233 at 20℃
CAS DataBase Reference 98-79-3(CAS DataBase Reference)
NIST Chemistry Reference Pidolic acid(98-79-3)
EPA Substance Registry System 5-Oxo-L-proline (98-79-3)

Safety Information

Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36-37/39
WGK Germany  3
RTECS  TW3710000
21
TSCA  Yes
HazardClass  IRRITANT
HS Code  29337900

MSDS

Usage And Synthesis

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