Potassium dichromate
SIGALD/207802 - ACS reagent, ≥99.0%
Synonym: Potassium bichromate
CAS Number: 7778-50-9
Empirical Formula (Hill Notation): Cr2K2O7
Molecular Weight: 294.18
EC Number: 231-906-6
MDL Number: MFCD00011367
Linear Formula: K2Cr2O7
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 207802-100G
This image depicts SKU: 207802-100G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 207802-500G
This image depicts SKU: 207802-500G
| anion traces | chloride (Cl-): ≤0.001% |
| sulfate (SO42-): ≤0.005% | |
| assay | ≥99.0% |
| cation traces | Ca: ≤0.003% |
| heavy metals (as Pb): ≤5 ppm | |
| Na: ≤0.001% | |
| Na: ≤0.02% | |
| form | crystals |
| grade | ACS reagent |
| impurities | ≤0.005% insolubles |
| InChI | 1S/2Cr.2K.7O/q;;2*+1;;;;; |
| InChI key | KMUONIBRACKNSN-UHFFFAOYSA |
| loss | ≤0.05% loss on drying |
| mp | 398 °C (lit.) |
| pH | 3.5-5.0 (25 °C, 29.4 g/L) |
| Quality Level | 200  |
| reaction suitability | reagent type: oxidant |
| SMILES string | [K+].[K+].[O-][Cr](=O)(=O |
| 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. |
| General description: | Potassium dichromate is a red-orange colored solid. Its crystals belong to the triclinic crystal system. On heating above 600°C, 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. |
| Packaging: | 100, 500 g in poly bottle |
| 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 | P210 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | O,T+,N |
| Risk Statements | 45-46-60-61-8-25-26-27-34-42/43-48/23-50/53 |
| Safety Statements | 53-26-36/37-45-60-61 |
| RIDADR | UN3086 - class 6.1 - PG 2 - EHS - RQ -Toxic solids, oxidizing, n |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥99.0% |
| mp | 398 °C (lit.) |
| UNSPSC | 12352300 |