7789-09-5
Product Name:
Ammonium dichromate
Formula:
Cr2H8N2O7
Synonyms:
Ammonium bichromate;Ammonium dichromate
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Ammonium dichromate is a bright orange red crystalline solid. It is readily ignited and burns producing a voluminous green residue. If heated in a closed container, the container may rupture due to the decomposition of the material. It may also act as a strong oxidizing agent if mixed with or contaminated with combustible material. It is soluble in water. |
|---|---|
| Color/Form | Bright orange-red monoclinic prisms |
| Odor | Odorless |
| Melting Point | Decomposes 180 °C |
| Solubility | 35.6 g/100 g water at 20 °C |
| Density | 2.15 at 77 °F (USCG, 1999) - Denser than water; will sink |
| Stability/Shelf Life | Stable under recommended storage conditions. |
| Autoignition Temperature | 437 °F (USCG, 1999) |
| Decomposition | Thermal decomposition is initiated by locally heating to 190 °C, and flame spreads rapidly through the mass. |
| pH | 1% solution has pH of 3.95; 10% solution has pH of 3.45 |
| Other Experimental Properties | Decomposes vigorously with luminescence around 200 °C |
| Chemical Classes | Metals -> Chromium Compounds, Inorganic |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Over Circle Oxidizers GHS03  Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06  Health Hazard GHS08  Environment GHS09 |
| GHS Hazard Statements |
H272:Oxidising liquids;Oxidising solids H301:Acute toxicity,oral H312:Acute toxicity,dermal H314:Skin corrosion/irritation H317:Sensitisation, Skin H330:Acute toxicity,inhalation H334:Sensitisation, respiratory H340:Germ cell mutagenicity H350:Carcinogenicity H360:Reproductive toxicity H372:Specific target organ toxicity, repeated exposure H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 252.07 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 7 |
| Rotatable Bond Count | 0 |
| Exact Mass | 251.914160 g/mol |
| Monoisotopic Mass | 251.914160 g/mol |
| Topological Polar Surface Area | 126 Ų |
| Heavy Atom Count | 11 |
| Formal Charge | 0 |
| Complexity | 194 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 3 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Ammonium dichromate is a bright orange red crystalline solid. It is readily ignited and burns producing a voluminous green residue. If heated in a closed container, the container may rupture due to the decomposition of the material. It may also act as a strong oxidizing agent if mixed with or contaminated with combustible material. It is soluble in water.