CAS NO: 10043-35-3
MOLECULAR FORMULA :- H3BO3
MOLECULAR WEIGHT :- 61.83
| SPECIFICATION | IP | BP | USP |
| Description | White, Crystalline powder or colorless shiny plates, unctuous to the touch or white crystals, odorless | White or almost white, crystalline powder, colorless, shiny plates greasy to the touch, or white or almost white crystals. | White or almost white, crystalline powder, colorless, shiny plates greasy to the touch, or white or almost white crystals. |
| Solubility | – | Soluble in water and in ethanol (96 %), freely soluble in boiling water and in glycerol ( 85 %). | – |
| Appearance of solution
(10% w/v solution) |
3.5 % w/v solution in boiling water is clear and colorless. | 3.3 % w/v solution is clear and color less. | – |
| Identification
(A) By color (B) Reaction |
A: The flame has a green border.
B: 3.3 %w/v the solution is faintly acid. |
A: The flame has green border.
B: 3.3 % w/v solution is acidic.
|
It responds to the tests for borate |
| Ph ( 3.3 % w/v solution) | 3.8-4.8 | 3.8 – 4.8 | – |
| Solubility in ethanol
(96% ) |
The solution is not more opalescent than opalescence standard OS2 and colorless | The solution has not more opalescent than reference suspension II and colorless. | – |
| Organic matter | – | It does not darken on progressive heating to dull redness | – |
| Sulphates | NMT 450 ppm | NMT 450 ppm | – |
| Arsenic | NMT 10 ppm | – | – |
| Heavy metal | NMT 20 ppm | – | NMT 20 ppm |
| Loss on drying | NMT 0.5 % | – | NMT 0.5 % |
| Residual solvents | Meets the requirements | ||
| Assay | 99.5 % to 100.5 % ( on dry basis) | 99.0 % – 100.5 % | 99.5 % to 100.5% (on dry basis ) |
Boric Acid is a commonly used reagent in molecular biology for the preparation of buffers such as Tris Borate EDTA and has applications in capillary and gel electrophoresis. Boric Acid is also noted in some studies to potentially have antibacterial and antifungal applications. This compound has also been employed in a multitude of applictions, from weatherproofing fabrics to hardening steel.
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