Ammonium Dichromate

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470300-202EA 40.35 USD
470300-202 470300-200 470300-198
Ammonium Dichromate
Chemicals for Science Education
CAS Number: 7789-09-5
Formula Weight: 252.06
Formula: (NH4)2Cr2O7
Hazard Info: Oxidizer, Flammable, Toxic, Irritant
Density (g/mL): 2.15
Freezing Point (°C): 170
Solubility: Water and Alcohol
Synonyms: Ammonium Bichromate, Dichromic Acid Diammonium Salt, Diammonium Dichromate(VI)
Shelf Life (months): 12
Storage: Yellow

Note: The chemical specifications for some items on this product page may differ from the specifications listed above. For more information, consult the Safety Data Sheet or contact your Ward's representative.

Delivery information: This product is designed for educational and teaching laboratories, and no certificate of analysis is available.




This disposal method is published for your convenience. You MUST have checked with your federal, state, and local regulations before using this method and these methods are only applicable for small laboratory sized quantities.

Use a lab apron, chemical resistant gloves and goggles before following the below method to dispose of hazardous waste.

 1. Add the substance to a twofold excess of 4% sodium thiosulfate (Na2S2O3) solution. Stir. Place the solution in a fume hood.
 2. Let the reaction come to completion over the course of an hour.
 3. Neutralize the solution with either dilute sodium hydroxide or dilute sulfuric acid to about a pH of 7 if necessary.
 4. The residue in the mixture should be filtered and removed for disposal by a licensed hazardous waste disposal service.

Solution Prep

To prepare a solution, determine the formula weight of the material, the concentration (Molarity) of the solution, and the amount of solution desired in Liters. Once this information has been obtained, use the following formula:
(Formula Weight) x (Concentration) x (Desired Volume) = Number of grams in desired volume of liquid

For a 1 M, 1 L solution:
(Formula Weight) x (1 mol/L) x (1 L) = x g added to 1-L volumetric flask. Dilute to a final volume of 1 L with DI Water.