SICHUAN TONGSHENG AMINO ACID CO.,LTD
Reference Standard
Product Name: H-Pyr-OH
CAS#: 98-79-3
Synonyms: L-Pyroglutamic Acid,
L-5-Oxo-2-pyrrolidinecarboxylic acid,
(S)-2-Pyrrolidone-5-carboxylic acid
Molecular Formula: C5H7NO3
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Molecular Weight: 129
Specification:
|
Item |
Standard |
|
Appearance |
White crystalline powder |
|
Specific rotation(a)D20 (C=5 H2O) |
-11.0 to -12.0º |
|
Chloride(C1) |
Not more than 0.02% |
|
Ammonium(NH4) |
Not more than 0.02% |
|
Sulfate(SO4) |
Not more than 0.02% |
|
Heavy metals(Pb) |
Not more than 10ppm |
|
Iron(Fe) |
Not more than 10ppm |
|
Arsenic(As2O3) |
Not more than 1 PPM |
|
Loss on drying |
Not more than 0.5% |
|
Residue on ignition |
Not more than 0.1% |
|
Assay |
99.0-101.0% |
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