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D – Biotin (CAS: 58-85-5), also known as vitamin H or vitamin B7, has the molecular formula C₁₀H₁₆N₂O₃S and a molecular weight of 244.31. It is a colorless, slender, needle-like crystal or a white crystalline powder that is odorless. It remains stable for several months in neutral or moderately acidic solutions but is unstable in alkaline solutions. It is readily soluble in hot water and dilute alkaline solutions but insoluble in other common organic solvents.
| Item | Specification |
| Melting Point | 231-233°C(lit.) |
| Boiling Point | 492.3±55.0°C at 760 mmHg |
| Density | 1.6±0.1 g/cm³ |
| Flash point | 251.5±31.5°C |
| Vapor pressure | 0.0±2.8 mmHg at 25°C |
| Refractive Index | 1.717 |
| Specific rotation | +91° (C = 1, in 0.1 mol/L sodium hydroxide solution) |
| Solubility | Readily soluble in hot water and dilute alkaline solutions; insoluble in other common organic solvents |
Feed Industry: A nutritional supplement for animal feed; prevents hoof cracking and hair loss in livestock and poultry; enhances reproductive and growth performance.
Food and Health: A nutritional fortifier for food; an ingredient in health foods that addresses hair loss, brittle nails, and skin issues; supplements the body’s vitamin B7.
Pharmaceuticals and Cosmetics: In pharmaceuticals, it is used to treat biotin deficiency-related dermatitis and for metabolic regulation; added to hair care and nail care products to strengthen hair and nails and repair the skin.
Biological Research: A core raw material for biomarkers; based on the biotin-avidin system, it is used in immunoassays, cell experiments, and the development of diagnostic reagents.
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