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Hangzhou Dingyan Chem Co., Ltd
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White powder, 201% content. Hangzhou Dingyan Chemical Co., Ltd. is located in the Xiasha Economic Development Zone of Hangzhou, the capital city of Zhejiang Province, on the southeast coast of China. It is a company specializing in the development and sales of high-tech products such as pharmaceutical raw materials, pharmaceutical intermediates, fine chemicals and biochemical reagents.
A modern private enterprise integrated with self-operated import and export.
Since its establishment, the company has adhered to the development path of "technological innovation" and attached great importance to scientific and technological innovation research and development. The company's high-quality products are sold well in more than 60 countries and regions such as North America, Western Europe, Southeast Asia, Central and South America.
At present, it has established long-term and stable cooperative relations with pharmaceutical companies in Europe, the United States, Greece, Germany, Iran, Russia, South Korea, India and other countries. With our rigorous attitude and sincere service, we have won the trust and reputation of customers.
Hangzhou Dingyan Chemical Co., Ltd. is located in the Xiasha Economic Development Zone of Hangzhou, the capital city of Zhejiang Province, on the southeast coast of China. It is a company specializing in the development, sales and self-support import and export financing of high-tech products such as pharmaceutical raw materials, pharmaceutical intermediates, fine chemicals and biochemical reagents.
Integrated modern private enterprise.
Since its establishment, the company has adhered to the development path of "technological innovation" and attached great importance to scientific and technological innovation research and development. The company's high-quality products are sold well in more than 2360 countries and regions such as North America, Western Europe, Southeast Asia, Central and South America.
At present, it has established long-term and stable cooperative relations with pharmaceutical companies in Europe, the United States, Greece, Germany, Iran, Russia, South Korea, India and other countries. With our rigorous attitude and sincere service, we have won the trust and reputation of customers. |
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HEBEI HUANWEI BIOTECH CO., LTD.
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Product description:
1) Specification: BP/USP
2) CAS No.: 83-88-5
3) Appearance:Orange yellow crystalline powder
4)Function: Vitamin B2, also known as riboflavin, is an easily absorbed micronutrient with a key role in maintaining health in humans and animals. It is the central component of the cofactors FAD and FMN, and is required by all flavoproteins . As such, vitamin B2 is required for a wide variety of cellular processes. Like the other B vitamins, it plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
Quality standard:
| Test Items |
Specifications |
Results |
| Appearance |
Orange yellow crystalline powder |
Meets |
| Identification |
Positive |
Meets |
| Acidity or Alkalinity |
check the color of the test solution after adding the respective solutions |
Meets |
| Lumiflavin |
Absorbance of the filtrate at 440nm does not exceed 0.025(USP);not more intense than BY6(EP/BP |
0.009 Meets |
| Absorbance |
0.31-0.33 A373nm/A267nm 0.36-0.39 A444nm/A267nm |
0.32 ,0.38 |
| Particla Size |
100% passes through 80 mesh sieve |
Meets |
| Specific Rotation |
between-115° and 135° (EP/BP/USP) |
-127° |
| Loss on drying |
≤1.5% |
0.4% |
| Heavy Metals |
<10ppm |
Meets |
| Residue on Ignition |
≤0.3%(USP) ≤0.1%(EP/BP) |
0.1% |
| Residual Solvents |
Method IV <467> (USP) |
Meets |
| Assay(on dried basis) |
98.0%-102.0%(USP) 97.0%-103.0%(EP/BP ) |
100.4% |
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Pharma Sources Insight January 2025
