| Chemical Properties | Ammonium chromate is a yellow crystalline compound which can be used in solution, which is yellow with an ammonia odor. |
| Uses | Sensitizing gelatin in photography, in textile printing pastes, in fixing chromate dyes on wool, and as a reagent in analytical chemistry. |
| Uses | Ammonium chromate, is used in photography as a sensitizer for gelatin coatings. It’s often used in photography, textile printing, and fixing chromate dyes on wool. It is also used as an analytical reagent, catalyst. |
| Uses | Reagent for the preparation of a solid heterogeneous oxidizing agent for liquid phase oxidation of alcohols. |
| Hazard | Toxic by inhalation, strong irritant. Con- firmed carcinogen. |
| Safety Profile | A poison. Mutation data reported. See also CHROMIUM COMPOUNDS. A powerful oxidizer. An explosion hazard when shocked or heated. When heated to decomposition it emits toxic fumes of NH3, Cr03, and NOx. Incompatible with reducing agents. |
| Potential Exposure | It is used to inhibit corrosion and in dyeing, photography and many chemical reactions. Used as a fungicide and fire retardant. |
| Shipping | UN3288 Toxic solids, inorganic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required. |
| Purification Methods | Crystallise it from weak aqueous ammonia (ca 2.5mL/g) by cooling from room temperature. It loses NH3 on heating to form ammonium dichromate. POISONOUS. |
| Incompatibilities | A strong oxidizer and an explosive. Contact with combustible, organic and other readily oxidizable substances may cause fire and explosions. Hydrazine, other reducing agents. Corrosive to metals. |
| Waste Disposal | Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal. Addition of a large volume of a reducing agent solution (hypo, bisulfite or ferrous salt, and acidify with 3 M sulfuric acid). When reduction is complete, flush to drain with large volumes of water. |
