Synonyms: Potassium bichromate
CAS Number: 7778-50-9
Formula: Cr2K2O7
Formula Weight: 294.18
Linear Formula: K2Cr2O7
MDL No.: MFCD00011367
Purity: >=99.0%
Melting Point: 398 C (lit.)
EC Number: 231-906-6
UNSPSC Code: 12352300
General description: Potassium dichromate is a red-orange colored solid. Its crystals belong to the triclinic crystal system. On heating above 600C, it decomposes to give oxygen, potassium chromate and chromium(III) oxide. It acts as a strong oxidizing agent in acidic media. It can be synthesized by the fusion of chromium(III) oxide with potassium carbonate and nitrate or oxygen.
Application: Potassium dichromate may be used in the preparation of hybride polymer-clay nanocomposite supported dichromate reagents. It may also be used as an oxidant for the selective oxidation of primary and secondary alcohol to corresponding aldehydes and ketones, respectively.
RTECS: HX7680000
RIDADR: UN3086 - class 6.1 - PG 2 - EHS - RQ -Toxic solids, oxidizing, n.o.s., HI: all
WGK Germany: 3
R Codes: 45-46-60-61-8-25-26-27-34-42/43-48/23-50/53
S Codes: 53-26-36/37-45-60-61
IOD Codes: O,T+,N
Symbol: GHS03, GHS05, GHS06, GHS08, GHS09
Signal Word: Danger
Hazard Statements: H272-H301-H312-H314-H317-H330-H334-H335-H340-H350-H360FD-H372-H410
Precautionary statements: P201-P210-P220-P260-P273-P280-P301 + P310 + P330-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338-P308 + P313-P370 + P378-P391-P403 + P233