| post date: | nov 30,2021 |
| expiry date: | nov 30,2022 |
| detailed description: |
cas no. :149-87-1
quantity: 1metric tons payment method: t/t product name: h-dl-pyr-oh cas#: 149-87-1 synonyms: dl-pyroglutamic acid molecular formula: c5h7no3 molecular weight: 129 specification: (reference standard: aji92) items standard analysis data appearance white crystalline powder conforms melting point(ºc) 160.0 to 162.0ºc 160.5ºc chloride(c1) not more than0.02% 0.01% ammonium(nh4) not more than0.02% conforms sulfate(so4) not more than 0.02% 0.005% heavy metals(pb) not more than 10ppm conforms iron(fe) not more than 10ppm 6ppm arsenic(as2o3) not more than 1ppm conforms loss on drying not more than 0.50% 0.36% residue on ignition not more than0.1% conforms assay 98.0-101.0% |
| cas registry number: | 149-87-1 |
| synonyms: | ;dl-2-pyrrolidone-5-carboxylic acid;dl-5-oxoproline;h-dl-pyr-oh;dl-proline, 5-oxo-;(+/-)-2-pyrrolidone-5-carboxylic acid;2-pyrrolidone-5-carboxylic acid;(+/-)-2-pyrrolidinone-5-carboxylic acid;5-oxo-dl-proline;dl-a-pyroglutamic acid;dl-glutamic acid lactam;5-oxo-l-proline; |
| molecular formula: | c5h7no3 |
| molecular weight: | 129.114 |
| molecular structure: | 
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| hazard symbols: | |
| risk codes: | r36/37/38:; |
| safety description: | s26:; s37/39:; |
