Name | copper chromate |
Synonyms | copper chromate COPPER(II)CHROMATE(VI) |
CAS | 13548-42-0 |
EINECS | 236-922-7 |
Molecular Formula | CrH2O4.Cu |
Molar Mass | 181.56 |
Melting Point | decomposes at 400℃ [KIR78] |
Water Solubility | mol/L solution H2O: 0.0020 (25°C); solid phase, CuCrO4 ·H2O [KRU93] |
Appearance | red-brown crystals |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
production method | preparation method a solution is prepared by dissolving 4.5g of sodium chromate in 20ml of water, this solution was added with cooling to a solution of 17g of copper carbonate CuCO 3 in 30ml of water containing 30g of chromium trioxide CrO 3. The resulting red-brown precipitate was filtered off and washed with cold water. The resulting dihydrate was placed under reduced pressure even in a desiccator. The crystal water is also not easily lost. |
category | toxic substances |
explosive hazard characteristics | spontaneous combustion by reaction with sulfide |
flammability hazard characteristics | non-combustible; Toxic chromium-containing, copper compound smoke generated from fire scene |
storage and transportation characteristics | warehouse low temperature, ventilation, dry; Fire prevention; High temperature protection |
fire extinguishing agent | water, carbon dioxide, dry powder, foam |