CAS NO: 7558-80-7
MOLECULAR FORMULA :- NaH2PO4
MOLECULAR WEIGHT :- 120.00 g/mol
| SPECIFICATION | IP | BP | USP |
| Description | A white powder or colorless crystals. | White, slightly deliquescent crystals or granules. | White, slightly deliquescent crystals or granules. |
| Solubility | – | Very soluble in water and slightly soluble in ethanol (96 %). | – |
| Identification
(A) Reaction (B) Reaction (C) Reaction (D) LOD
|
A: It gives reaction of phosphates. B: It gives reaction of sodium salts.
|
A : 10 % solution is slightly acidic
B: It gives reaction of Phosphates. C: It gives reaction of Sodium Salts. D : Complies with the test for loss on drying |
A: It gives reaction of phosphates. B: It gives reaction of sodium salts.
|
| pH | 4.1 – 4.5 | 4.2 – 4.5 | 4.1 – 4.5 |
| Insoluble Substances | NMT 0.2 % | – | NMT 0.2 % |
| Chloride | NMT 140 ppm | NMT 200 ppm | NMT 140 ppm |
| Sulphate | NMT 1500 ppm | NMT 300 ppm | NMT 1500 ppm |
| Al , Ca & related –element | Not became turbid when rendered slightly alkaline to litmus paper with 6 M ammonium hydroxide. | – | Not became turbid when rendered slightly alkaline to litmus paper |
| Arsenic | NMT 8 ppm | NMT 2 ppm | NMT 8 ppm |
| Heavy metals | NMT 20 ppm | – | NMT 20 ppm |
| Water by KF | NMT 2.0 % | – | NMT 2.0 % |
| Organic volatile impurities | – | – | Meets the requirement |
| Residual Solvents | – | Meets the requirement | |
| Iron | – | NMT.10 ppm | – |
| Reducing substance | – | The solution retains a slight red color. | – |
| LOD ( at 1300C ) | – | NMT 1.0% | – |
| Assay (on dry basis) | 98.0 % – 103.0 % | 98.0 % – 100.5% | 98.0%-103.0% |
Sodium phosphate monobasic is a reagent with very high buffering capacity widely used in molecular biology, biochemistry and chromatography. Sodium phosphate monobasic is highly hygroscopic and water soluble. Useful in conjunction with Sodium Phosphate, Dibasic (sc-203277, sc-203402, sc-236917, sc-236918) in the preparation of biological buffers. Used in many applications including the purification of antibodies.
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