China (Mainland)
Assessedsupplier
VITAMIN A CAS NO.68-26-8
- Min.Order: 1 Gram
- Payment Terms: T/T
- Available Specifications:
- Product Details
Keywords
- Retinol,all-trans- (8CI)
- 2,4,6,8-Nonatetraen-1-ol, 3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-,(all-E)-
- A-Mulsal
Quick Details
- ProName: VITAMIN A
- CasNo: 68-26-8
- Molecular Formula: C20H30O
- Appearance: crystalline
- Application: Inhibitors;Intracellular receptor;Inte...
- DeliveryTime: in stock
- PackAge: according to the customer
- Port: shanghai
- ProductionCapacity: 100 Metric Ton/
- Purity: 99%
- Storage: -20°C
- Transportation: by air sea and courier
- LimitNum: 1 Gram
- Related Substances: 1
- Residue on Ignition: 1
- Heavy Metal: 1
- Valid Period: 1
- 1: 1
- 1: 1
Superiority
Manufacturing process for Vitamin A includes these steps as follows: Step A: Synthesis of Preparation of ethyl ether of ethynyl-β-ionol;Step B: Coupling Reaction; Step C:Semi-Hydrogenation of Coupling Product;Step D:Hydrolysis of Semi-Hydrogenated Coupling Product. Separation of Vitamin A from the product obtained was achieved by acetylating the total reaction product using pyridine-acetic anhydride at room temperature and chromatographing on alumina neutralized with acetic acid. A fairly clean separation was achieved. The Vitamin A acetate fraction was sufficiently pure to become crystallized from pentane at -15°C when seeded with a pure Vitamin A acetate crystal.
When the Vitamin A acetate was converted to the alcohol form of Vitamin A, the final product showed the characteristic infrared and ultraviolet absorption curves for Vitamin A. Similar results were obtained using as co-solvents (with the liquid ammonia) ethylene diamine and ether; pentane; tetrahydrofuran; diethylamine and hexamethylphosphoramide
Details
Manufacturing process for Vitamin A includes these steps as follows: Step A: Synthesis of Preparation of ethyl ether of ethynyl-β-ionol;Step B: Coupling Reaction; Step C:Semi-Hydrogenation of Coupling Product;Step D:Hydrolysis of Semi-Hydrogenated Coupling Product. Separation of Vitamin A from the product obtained was achieved by acetylating the total reaction product using pyridine-acetic anhydride at room temperature and chromatographing on alumina neutralized with acetic acid. A fairly clean separation was achieved. The Vitamin A acetate fraction was sufficiently pure to become crystallized from pentane at -15°C when seeded with a pure Vitamin A acetate crystal.
When the Vitamin A acetate was converted to the alcohol form of Vitamin A, the final product showed the characteristic infrared and ultraviolet absorption curves for Vitamin A. Similar results were obtained using as co-solvents (with the liquid ammonia) ethylene diamine and ether; pentane; tetrahydrofuran; diethylamine and hexamethylphosphoramide