Ammonium dichromate
SIGALD/402826 - ACS reagent, ≥99.5%
Synonym: Ammonium bichromate
CAS Number: 7789-09-5
Empirical Formula (Hill Notation): H8Cr2N2O7
Molecular Weight: 252.06
EC Number: 232-143-1
MDL Number: MFCD00010879
Linear Formula: (NH4)2Cr2O7
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: 402826-100G
This image depicts SKU: 402826-100G
| anion traces | chloride (Cl-): ≤0.005% |
| sulfate (SO42-): ≤0.01% | |
| assay | ≥99.5% |
| cation traces | Ca: ≤0.002% |
| Fe: ≤0.002% | |
| Na: ≤0.005% | |
| form | crystals |
| grade | ACS reagent |
| impurities | ≤0.005% insolubles |
| InChI | 1S/2Cr.2H3N.2H2O.5O/h;;2* |
| InChI key | XAQCJVGGJJFLPP-UHFFFAOYSA |
| loss | ≤3.0% loss on drying |
| mp | 170 °C (dec.) (lit.) |
| pH | 3-4 (25 °C, 50 g/L) |
| Quality Level | 200  |
| reaction suitability | reagent type: oxidant |
| SMILES string | N.N.O[Cr](=O)(=O)O[Cr](O) |
| vapor density | 8.7 (vs air) |
| Application: | Ammonium dichromate may be used in the following processes: • Oxidation of alcohols in the presence of Mg(HSO4)2 (magnesium hydrogen sulfate) and wet SiO2 (silicon dixide). • Preparation of Cr2O3/Al2O3 (chromium (III) oxide/aluminium oxide) catalysts. • Oxidative coupling of thiols. • Preparation of mesoporous molecular sieves. • Preparation of polypyrrole (PPy). • Preparation of solid oxide fuel cell (SOFC) interconnect. |
| General description: | Ammonium dichromate is a hexavalent chromium compound with a high oxidation potential. Hexavalent chromium is potent carcinogen and an environmental pollutant. |
| 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 - H340 - H350 - H360 - H372 - H410 |
| Precautionary statements | P210 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | E,T+,N |
| Risk Statements | 45-46-60-61-2-8-21-25-26-34-42/43-48/23-50/53 |
| Safety Statements | 53-45-60-61 |
| RIDADR | UN 1439 5.1 / PGII |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥99.5% |
| mp | 170 °C (dec.) (lit.) |
| UNSPSC | 12352300 |