AMMONIUM CHROMATE CAS 7788-98-9
Introduction：Basic information about AMMONIUM CHROMATE CAS 7788-98-9, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
AMMONIUM CHROMATE Basic information
| Product Name: | AMMONIUM CHROMATE |
| Synonyms: | ammoniumchromate(vi);chromicacid(h2cro4),diammoniumsalt;chromicacid[h2cro4],diammoniumsalt;diammoniumchromate;neutralammoniumchromate;AMMONIUM CHROMATE;Ammonium chronate;AmmoniumDichromate,>99% |
| CAS: | 7788-98-9 |
| MF: | CrH8N2O4 |
| MW: | 152.07 |
| EINECS: | 232-138-4 |
| Product Categories: | Ammonium Salts;Metal and Ceramic Science;Inorganic Chemicals;Salts |
| Mol File: | 7788-98-9.mol |
AMMONIUM CHROMATE Chemical Properties
| Melting point | 180°C (dec.) |
| density | 1.91 g/mL at 25 °C (lit.) |
| solubility | H2O: 1 M at 20 °C, clear, yellow |
| form | Crystalline |
| color | Yellow-orange |
| Specific Gravity | 1.91 |
| Water Solubility | Soluble in water. Slightly soluble in liquid ammonia, acetone, methanol. Insoluble in ethanol. |
| Merck | 14,510 |
| Exposure limits | ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin) OSHA: Ceiling 0.1 mg/m3 NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3 |
| InChI | 1S/Cr.2H3N.2H2O.2O/h;2*1H3;2*1H2;;/q+2;;;;;;/p-2 |
| InChIKey | FEIXNIOTSKFSAZ-UHFFFAOYSA-L |
| SMILES | N.N.O[Cr](O)(=O)=O |
| CAS DataBase Reference | 7788-98-9(CAS DataBase Reference) |
| EPA Substance Registry System | Ammonium chromate (7788-98-9) |
Safety Information
| Hazard Codes | O,T,N |
| Risk Statements | 49-8-43-50/53-34 |
| Safety Statements | 53-17-45-60-61-36/37/39-26 |
| RIDADR | UN 1479 5.1/PG 2 |
| WGK Germany | 3 |
| RTECS | GB2880000 |
| TSCA | TSCA listed |
| HazardClass | 5.1 |
| PackingGroup | III |
| Storage Class | 5.1B - Oxidizing hazardous materials |
| Hazard Classifications | Aquatic Acute 1 Aquatic Chronic 1 Carc. 1A Carc. 1B Inhalation Eye Dam. 1 Ox. Sol. 2 Resp. Sens. 1 Skin Corr. 1B |
| Hazardous Substances Data | 7788-98-9(Hazardous Substances Data) |
| Chemical Properties | Ammonium chromate is a yellow crystallinecompound which can be used in solution, which is yellowwith 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 indyeing, photography and many chemical reactions. Used asa fungicide and fire retardant. |
| Shipping | UN3288 Toxic solids, inorganic, n.o.s., HazardClass: 6.1; Labels: 6.1-Poisonous materials, TechnicalName 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 oxidizablesubstances may cause fire and explosions. Hydrazine,other reducing agents. Corrosive to metals. |
| Waste Disposal | Consult with environmentalregulatory agencies for guidance on acceptable disposalpractices. Generators of waste containing this contaminant(≥100 kg/mo) must conform with EPA regulations governingstorage, 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 sulfuricacid). When reduction is complete, flush to drain withlarge volumes of water. |
AMMONIUM CHROMATE Preparation Products And Raw materials
| Raw materials | Ammonia-->Chromium(VI) oxide-->Potassium sulfate-->Potassium chromate-->Ammonium dichromate |
| Preparation Products | Furfuryl alcohol |
