L-Ascorbic Acid 99.5% AR For Biochemistry
(Confirms to IP,USP)
L-Threoascorbic acid, Antiscorbutic factor, Vitamin C
Product Code. |
00308 |
Grade |
|
Purity |
99.5% |
CAS No. |
50-81-7 |
Molecular Formula |
C8H8O6 |
Molecular Weight |
176.12 |
H.S.Code |
2936.27000 |
Shelf Life |
36 Months |
Physical Properties
| Physical state at 20 °C |
Solid |
Colour |
White crystalline |
Odour |
Odorless |
| pH value |
1 - 2.5 |
Melting point/ Freezing point [°C] |
190 - 194 °C |
Density [g/cm3] |
1.65 |
| Solubility in water [% weight] |
176 g/l at 20 °C - completely soluble |
Packaging
Specification
| Appearance | A white to very pale yellow crystalline powder or colourless crystals; odourless. On exposure to light it gradually darkens. |
| Assay | 99.5-100.5% |
| Identity (IR) | To confirm the structure |
| Identification (as per USP, IP) | To comply the tests |
| Appearance of solution | To comply IP test |
| Specific optical rotation ([?]20/D; 10% solution) | +20.5° to +21.5° |
| Light absorption | Absorbance at about 244 nm is about 0.56 |
| Oxalic acid | Max 0.3% |
| Loss on drying | Max 0.1% |
| Sulphated ash | Max 0.1% |
| Chloride (Cl) | Max 0.01% |
| Sulphate (SO4) | Max 0.002% |
| Copper (Cu) | Max 0.0005% |
| Heavy metal (as Pb) | Max 0.001% |
| Iron (Fe) | Max 0.0002% |
| Lead (Pb) | Max 0.001% |
Safety Information and Hazard Symbols