Iodine is a purple or black non-metallic element with an orthorhombic crystal structure. This toxic element is easily sublimated and can be easily purified in this way.
Purple-black scaly or platelet with metallic luster. It is brittle and the vapor is purple. Has a special irritating odor. Slightly soluble in water, solubility increases with temperature; insoluble in sulfuric acid; easily soluble in organic solvents; iodine is also easily soluble in chloride, bromide; more soluble in iodide solution; soluble in sulfur, ammonium and Alkali metal iodides, aluminum, tin, titanium and other metal iodides.
use
Mainly used in the manufacture of iodide, used in the manufacture of pesticides, feed additives, dyes, iodine, test paper, medicines, etc. It is used to prepare equivalent solvents, determine iodine value, and calibrate the concentration of sodium thiosulfate solution. The solution can be used as a disinfectant. Photoplate Used in the preparation of iodine and thinning liquids 
Specification| ITEM | SPECIFICATION | RESULT |
| Description | Dark brown crystal granule | Conforms |
| Content | ≥99.5% | 99.5-100.5% |
| Loss on Drying | ≤1% | 0.6% |
| Cl & Br content | ≤0.01% | 0.002% |
| Ferrum | ≤10ppm | ≤10ppm |
| Sulfate | Conforms | Conforms |
| Heavy metal | ≤10ppm | ≤10ppm |
| Conclusion | The product meet the testing requirements |
2. Used as make pesticide, feed additives,dye,iodine,test,and medications.
3. Used to make equivalent solvent,determine iodine value,
4. Contentanded calibration of sodium solution concentration.
5. Solution can be disinfectant,photoengraving for good fittings and thinning liquid preparation.
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