USD $100.00-100.00 / Kilogram
USD $10.00-90.00 / Kilogram
USD $8.80-8.80 / Gram
USD $10.00-90.00 / Kilogram
USD $2.00-2.00 / Gram
USD $1.00-10.00 / Kilogram
USD $2.00-2.00 / Gram
USD $2.00-2.00 / Gram
superiority
kono is a leading manufacturer and supplier of chemicals in china. we develop ,produce and distribute high
quality pharmaceuticals, intermediates, special chemicals and other fine chemicals.
we could give you:
1.best quality in your requirement
2.competitive price in china market
3.mature technical support
4.professional logistic support
all we want is win-win business. send yr. inquiries, you will get it!
1.we supply vitamin b2
2.orange yellow crystalline powder
3.high qulity,competitive price
4.fast delivery
4.standard:cp2000
molecular formulac17h20n4o6
characteristics: orange yellow crystalline powder; micro foul, bitter taste
quality standard cp2000
assay : 98.0%-101.0%
function: 1. help to improve the quality of life of 2. treatment of migraine 3. promote the development and cell regeneration; 4. to the skin, nails, hair, the normal growth; 5. to help eliminate the mouth, lips, tongue inflammation; 6. to enhance visual acuity, reducing eye fatigue;
[packaging]: kraft paper bag or drum packaging, bag (barrels) net content of 25kg
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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about service
1, delivery date: prompt
2, high quality and reasonable price, welcome to order.
3, other services: if you have special request to the product service and technical index, please inform us in time;
4, service tenet: we provide the high quality products and 100% customer satisfaction to after-sales service.