Zinc Oxide-BP
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Technical characteristics
- BrandZinc Oxide
- Country of manufactureIndia
Description
| Determination | Specification |
| Characteristics | A soft, White or faintly yellowish white amorphous powder, free from grittiness, odorless practically insoluble in water and in ethanol (96 %)it dissolve in dilute mineral acids. |
| Identification | A. Becomes yellow when strongly heated. The yellow Colordisappears on cooling. B. Dissolve 0.1 g in 1.5 ml of 2 M hydrochloric acid And dilute to 5 ml with water.The solution yields theReaction characteristic of zinc salts. |
| Alkalinity | Shake 1.0 g with 10 ml of boiling water; add 0.1 ml of phenolphthalein solution and filter. If the filtrate is red not morethan 0.3 ml of 0.1 M hydrochloric acid is Require to discharge the color. |
| Carbonate & Sub- stances Insoluble in acids. |
Dissolve 1.0 gm in 15 ml of 2M hydrochloric acid. No. Effervescence is produced and the solution is not More opalescent than reference suspension II Appendix IV A, and is colorless,appendix B,Method II |
| Arsenic | 0.2 g complies with the limit test for arsenic Appendix VII (5 ppm) |
| Cadmium | Not more than 10 ppm of Cd when determined by atomic absorption spectrophotometry, Appendix IID, Method II, measuring at 228.8 nm and using either an air -acetylene or an air propane flame.dessolve 2 g of the substance being examined in 14 ml a mixture of equal volumes of water and -cadmium and lead -free nitric acid, boil for 1 minute, cool and dilute to 100 ml with water Use cadmium solution Asp, suitably diluted with a 3.5% v/v solution of cadmium- and lead free nitric acid, to prepare the standard solutions. |
| Iron | Dissolve 50 mg in 1 ml of 2-M hydrochloric acid and dilute to 10 ml with water. The resulting solution complies with the limit test for iron, Appendix VII (200 ppm). Use 0.5 ml of mercaptoacetic acid in the test. |
| Lead | Not more than 50 PPM of Pb when determined by method II For atomic absorption spectrophotometry Appendix II D, Measuring at 283.3 nm or 217.0 nm using air- acetylene flames. Dissolve 5 g of the substance being examined in 24 ml of a mixture of equal volumes of water and cadmium -and lead -free nitric acid, boil for 1 minute, cool and dilute to 100 ml with water. Use lead solution Asp Suitably diluted with a 3.5 % v/v solution of cadmium - and lead free nitric acid, to prepare the standard solutions. |
| Loss On Ignition | When ignited at 500 Deg.C, loses not more than 1.0 % of its weight.Use 1 g. |
| Assay | Carry out the complexometric titration of zinc Appendix VIII D, using a solution of 0.15 g in 10 ml of 2 M acetic acid. Each ml of 0.1-M disodium edetate VS is equivalent to 8.14 mg of ZnO. Zinc Oxidecontents not less than 99.0 % and not more than 100.5 %) |
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Zinc Oxide-BP