Bismuth Subgallate
Bismuth Subgallate is used by dermatologists to prepare astringent mask to protect the skin from infections and bleeding after skin pealing.
Specifications
Generic name: | Bismuth Subgallate | Primary packaging | Polyethylene bag |
|---|---|---|---|
Molecular formula | C7H5iO6 | Secondary packaging | Cardboard fiber drum |
Molecular weight | 394.09 g/mol. | Internal product code | PTQ-4.5.2 |
Presentation | Powder | Retest date: | 48 months |
Storage conditions | ≤ 30°C, protect from direct sunlight exposure | CAS Number: | 99-26-3. |
TEST | SPECIFICATION |
|---|---|
Appearance | Yellow Powder |
Solubility | Practically insoluble in water and in ethanol (96 per cent). It dissolves in mineral acids with decomposition and in solutions of alkali hydroxides, producing a reddish-brown liquid. |
Appearance of solution (HNO3) | Solution is not more opalescent than reference suspension and is colourless. |
% Substances not precipitated by ammonia. | ≤ 1.00% |
Identification | Positive for Bi +3 |
% Loss on drying | ≤ 7.00% |
% Assay (As Bi2O3) | 52.00 – 57.00% |
% Alkali and alkaline-earth metals | ≤ 0.5% |
% Free Gallic Acid | ≤ 0.5% |
% Arsenic | ≤ 0.00075% |
% Copper | The liquid does not show a bluish color. |
% Lead | The liquid does not become cloudy. |
% Silver | Insoluble precipitate does not form |
Nitrates | No reddish brown color appears in the contact area of the two liquids. |
