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Detail of 7789-00-6
- Product Name:Chromic acid (H2CrO4),potassium salt (1:2)
- CAS No:7789-00-6
- Boiling Point:°Cat760mmHg
- Melting Point:975 ºC
- Hazard Symbols:
- Molecular Formula:CrH2 O4 . 2 K
- Molecular Structure:
- Synonyms:Chromicacid (H2CrO4), dipotassium salt (8CI,9CI); Bipotassium chromate; Dipotassiumchromate; Dipotassium chromate (K2CrO4); Dipotassium chromate(2-); Dipotassiummonochromate; Neutral potassium chromate; Potassium chromate; Potassiumchromate (K2(CrO4)); Potassium chromate(VI)
- Transport Information:UN 1479/3288/9142
- EINECS:232-140-5
- Molecular Weight:194.20
- Flash Point:°C
- Risk Codes:R22;R36/37/38;R43;R46;R49;R50/53;R8
- Density:2.732
- Solubility:640 g/L (20 ºC) in water
- Appearance:lemon-yellow crystals
- MSDS:POTASSIUM-CHROMATE(7789-00-6).pdf
- Safety:Confirmed carcinogen with experimental tumorigenic data. Poison by ingestion, intravenous, subcutaneous, and intramuscular routes. An experimental teratogen. Other experimental reproductive effects. Human mutation data reported. A powerful oxidizer. When heated to decomposition it emits toxic fumes of K2O. Used as a mordant for wool, in the oxidizing and treatment of dyes on materials. See also CHROMIUM COMPOUNDS.Analytical Methods: For occupational chemical analysis use NIOSH: Chromium Hexavalent, 7024.
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Grade
- Technical, reagent.
ChemUse
- Reagent in analytical chemistry, aniline black, textile mordant, enamels, chromate pigments, inks.
Derivation
- Roasting powdered chromite with potash and limestone, treating the cinder with hot potassium sulfate solution, and leaching.
Properties
- Rhombic, yellow crystals. Mp: 975°, d: 2.73 @ 18°. Sol in water; insol in alc, Me2CO, and PhCN.
TOXICITY
1. dnr-ssp 60 nmol/L
CNJGA8 Canadian Journal of Genetics and Cytology. 24 (1982),771. 2. dnd-hmn:lng 25 µmol/L
CBINA8 Chemico-Biological Interactions. 36 (1981),345. 3. orl-mus LD50:180 mg/kg
MUREAV Mutation Research. 223 (1989),403. 4. ipr-mus LD50:32 mg/kg
MUREAV Mutation Research. 223 (1989),403. 5. scu-dog LDLo:19 mg/kg
SMSJAR Scottish Medical and Surgical Journal. 26 (1826),131. 6. ivn-dog LDLo:2900 µg/kg
EQSSDX Environmental Quality and Safety, Supplement. 1 (1975),1. 7. scu-rbt LDLo:12 mg/kg
EQSSDX Environmental Quality and Safety, Supplement. 1 (1975),1. 8. ims-rbt LD50:11 mg/kg
JPETAB Journal of Pharmacology and Experimental Therapeutics. 87 (1946),119. 9. scu-gpg LDLo:60 mg/kg
EQSSDX Environmental Quality and Safety, Supplement. 1 (1975),1.
