83-88-5 Vitamin B2 high purity,competitive price
bulk production
Chemsigma International Co.,Ltd. is a chemical manufacturer, specialize in custom synthesis and organic chemical manufacturing for overseas customers, in the field of API, pharmaceutical intermediates, chemical intermediates, fine chemicals, agrochemicals, and Fragrance Perfume etc. We setup a factory in JiangSu priority to Pharmaceutical Intermediates and a factory in AnHui mainly engaged in Fragrance Perfume. Now we have two autoclaves (up to 7.0MPa), two rectifying columns (8m and 6m), two refrigerating sets (below to -25 degree centigrade) and other normal machine.
Our mission statement shows our commitment to quality. Our core value is the satisfaction of our clients. We greatly look forward to collaborating with you to grow both of our businesses into a much larger scale.
items of test |
limits of test |
results of test |
1.appearance |
orange yellow crystalline powder |
meets |
2.identification |
positive |
meets |
3.acidity or alkalinity |
check the color of the test solution after adding the respective solutions |
meets |
4.lumiflavin |
absorbance of the filtrate at 440nm does not exceed 0.025 (usp);not more intense than by6(ep/bp) |
0.008 meets |
5.absorbance |
0.31-0.33 a373nm/a267nm 0.36-0.39 a444nm/a267nm |
0.32 0.38 |
6.particla size |
100% passes through 60 mesh sieve |
meets |
7.specific rotation |
between-115º and -135º (ep/bp/usp) |
-121º(usp) -1300(bp/ep) |
8.loss on drying |
≤1.5% |
0.4% |
9.heavy metals |
<10ppm |
meets |
10.residue on ignition |
≤0.3% (usp) ≤0.1%(ep/bp) |
0.1% |
11.residual solvents |
method iv <467> (usp) |
meets |
12.assay(ondried basis) |
98.0%-102.0% (usp) 97.0%-103.0% (ep/bp) |
98.8%(usp) 99.7%(ep/bp) |
conclusion: the product with this batch number meets all requirements of the following valid compendia when tested accordingly: ep5+bp2008+ usp33. |
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