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| TESTS | USP SPECIFICATIONS |
| Description/ Appearance |
Colorless, viscous, clear hygroscopic liquid without odor |
| Identification | IR test |
| Assay (Purity) | 99.5% min |
| Specific gravity | 1.035 - 1.037 g/cm 3 at 25 ° C |
| Index of refraction | 1.431 - 1.433 n D 20 |
| Acidity | ≤ 0.20 ml of 0.10 N NaOH |
| Water/Moisture | 0.2% max |
| Residue on ignition | 4.0 mg max |
| Chloride | 5 ppm max |
| Heavy metals(as Pb) | 5 ppm max |
| Sulphate sas SO42- | 10 ppm max |
| Oxidizing substances | Not required |
| Arsenic | 5 ppm max |
| Reducing substances | Not required |
| Organic volatile impurities | a. Chloroform: 60 ppm b. 1, 4-dioxane: 400 ppm c. Methylene chloride: 600 ppm d. Trichloroethylene: 100 ppm |
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