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. |
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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 |
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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 |
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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.