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Hangzhou HETD Pharm&Chemical Co.,Ltd
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Description White to pale yellow powder or flaky crystals Conforms
Identification IR UV conforms Conforms
PH value Between 3.5 and 5.0 4.1
Appearance of solution Clear to yellow standard No. 7 Conforms
Methyl benzenesulphonate Not more than 10ppm 8ppm
Toluene Not more than 0.2% 0.09%
Related substances Total: Not more 3.5% 1.98%
Impurity F: Not more 3.0% 0.76%
Any other second impurity: Not more than 2.0% Conforms
Isomer ratio Cis-Cis: 56.0%-60.0% 57.0%
Cis-Thans: 34.5%-37.5% 35.4%
Trans-Trans: 5.0%-6.5% 5.9%
Loss on drying Not more than 1.0% 0.6%
Sulphated ash Not more than 0.2% 0.10%
Assay Between 97.0% and 103.0% 99.0%
Microbiolgical
Total plate count <1000CFU/gm compiles
Yeast & mole <1000CFU/gm compiles
Salmonella Negative negative
E. Coli Negative negative
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