Details:
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Potassium chromate Basic information |
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Potassium chromate Chemical Properties |
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Melting point |
971 °C(lit.) |
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density |
1.00 g/mL at 20 °C |
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vapor density |
6.7 (vs air) |
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storage temp. |
2-8°C |
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solubility |
H2O: soluble |
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Water Solubility |
640 g/L (20 ºC) |
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Merck |
14,7622 |
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Stability: |
Stable. Strong oxidizing agent - contact with combustible materials may lead to fire or violent reaction. Incompatible with strong reducing agents, combustible materials. |
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CAS DataBase Reference |
7789-00-6(CAS DataBase Reference) |
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EPA Substance Registry System |
Chromic acid (H2CrO4), dipotassium salt(7789-00-6) |
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Potassium chromate Usage And Synthesis |
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Chemical Properties |
lemon-yellow crystals |
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General Description |
Potassium chromate is a yellow crystalline solid. Potassium chromate is soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Potassium chromate is used in chemical analysis, in making pigments for paints and inks, as a fungicide, and to make other chromium compounds. |
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Air & Water Reactions |
Soluble in water. |
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Reactivity Profile |
Oxidizing agents, such as Potassium chromate , can react with reducing agents to generate heat and products that may be gaseous (causing pressurization of closed containers). The products may themselves be capable of further reactions (such as combustion in the air). The chemical reduction of materials in this group can be rapid or even explosive, but often requires initiation (heat, spark, catalyst, addition of a solvent). Explosive mixtures of inorganic oxidizing agents with reducing agents often persist unchanged for long periods if initiation is prevented. Such systems are typically mixtures of solids, but may involve any combination of physical states. Some inorganic oxidizing agents are salts of metals that are soluble in water; dissolution dilutes but does not nullify the oxidizing power of such materials. Organic compounds, in general, have some reducing power and can in principle react with compounds in this class. Actual reactivity varies greatly with the identity of the organic compound. Inorganic oxidizing agents can react violently with active metals, cyanides, esters, and thiocyanates. |
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Health Hazard |
Inhalation causes local irritation of mucous membranes; continuing nose irritation can result in perforation of nasal septum. Ingestion may cause violent gastroenteritis, circulatory collapse, vertigo, coma, and toxic nephritis; ingestion of excessive quantities can be fatal. Contact with eyes causes severe irritation and conjunctivitis. Repeated or prolonged exposure to dust, mist, or solutions may cause dermatitis; contact with breaks in the skin may cause ``chrome sores'' appearing as slow-healing, hard-rimmed ulcers which leave the area vulnerable to infection. |
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Fire Hazard |
Behavior in Fire: May increase intensity of fire if in contact with combustible materials. Cool containers and spilled material with plenty of water. |
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Potassium chromate Preparation Products And Raw materials |
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