Potassium Dichromate Product Stewardship Summary February 2012

(K2Cr2O7)

Chemical Name: Potassium dichromate Chemical Category (if applicable): Inorganic chemical reagent Synonyms: Potassium bichromate; Chromic acid [H2Cr2O7] dipotassium salt; Dichromic acid dipotassium salt; Dipotassium bichromate; Dipotassium dichromate(VI); Lopezite, potassium bichromate; Potassium dichromate(VI); and Dipotassium dichromium heptaoxide CAS Number: 7778-50-9 CAS Name: Potassium dichromate EC (EINECS) Number: 231-906-6 Other identifier (Please specify): GPS0063

 Potassium dichromate is a strong oxidizing agent. Honeywell manufactures potassium dichromate for use by industry to treat and coat metal surfaces and for electroplating applications.

 Exposure can occur at either a potassium dichromate production facility or at other manufacturing, packaging or storage facilities that handle potassium dichromate. Persons involved in maintenance, sampling and testing activities, or in the loading and unloading of potassium dichromate packages are at risk of exposure, but worker exposure can be controlled with the use of proper general mechanical ventilation and personal protective equipment. Good manufacturing practices and industrial hygiene practices are also implemented to prevent or reduce exposure to potassium dichromate. Workplace exposure limits for hexavalent chromium compounds have been established for use in worksite safety programs. The general public or consumers have negligible exposure to potassium dichromate. Please see the MSDS for additional information.

Potassium dichromate is an odorless solid in the form of orange-red crystals or powder. It is stable under normal conditions of use and storage. Potassium dichromate is not combustible, but it is a strong oxidizer that enhances the combustion of other substances. Avoid excess heat, combustible materials, and dust formation. Potassium dichromate reacts violently with hydrazine, anhydrous hydroxylamine, ethylene glycol, and mixtures of sulfuric acid and acetone. Combinations of potassium dichromate with boron and silicon, iron or tungsten form explosive pyrotechnic mixtures. Potassium dichromate is not compatible with oxidizing agents (such as perchlorates, peroxides, permanganates, chlorates, nitrates, chlorine, bromine and fluorine), strong acids (such as hydrochloric, sulfuric and nitric), and metals.

 Potassium dichromate can cause irritation or burns of the skin and eyes, sores or ulcers of the skin, and/or allergic contact dermatitis. If ingested, potassium dichromate may cause

This product stewardship summary is intended to give general information about the chemical or categories of chemicals addressed. It is not intended to provide an in-depth discussion of all health and safety information. Additional information on the chemical is available through the applicable Material Safety Data Sheet which should be consulted before use of the chemical. The product stewardship summary does not supplant or replace required regulatory and/or legal communication documents. Statements concerning use of our products are made without warranty that any such use is free of patent infringement and are not recommendations to infringe any patent. gastrointestinal irritation, nausea, vomiting and diarrhea, and damage to the liver and kidneys. Short-term inhalation of potassium dichromate dust or mist can cause irritation to the nose, throat and respiratory system

 Prolonged or repeated inhalation exposures to potassium dichromate can cause sores to develop in the nose and resultant nosebleeds, and if the damage is severe, the nasal septum may perforate. Inhalation of potassium dichromate may also lead to asthmatic symptoms, such as wheezing and shortness of breath.

 Potassium dichromate is a known human carcinogen, affecting the respiratory tract.

 Potassium dichromate may cause reproductive and/or developmental toxic effects.

 Potassium dichromate is toxic to some aquatic organisms and may result in long-term adverse effects in the aquatic environment.

 Please contact us for more information. Additional information may also be found at the following links:  European Risk Assessment Report, Vol 53 - Chromium trioxide, Sodium chromate, Sodium dichromate, Ammonium dichromate and Potassium dichromate  IARC Monograph Vol. 49, Chromium, Nickel and Welding  SIDS Initial Assessment Profile - 5 Chromium Substances  U.S. EPA IRIS - Chromium (VI)  U.S. EPA Tox Review in Support of IRIS - Hexavalent Chromium  U.S. Department of Labor, OSHA - Hexavalent Chromium  WHO Environmental Health Criteria 61 - Chromium  WHO Guidelines for Drinking-water Quality - Chromium in Drinking-water

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