Sodium Dichromate Product Stewardship Summary February 2012

(Na2Cr2O7)

Chemical Name: Sodium dichromate Chemical Category (if applicable): Inorganic chemical reagent Synonyms: Sodium bichromate; Chromic acid, disodium salt; Disodium dichromate(VI); Dichromic acid, disodium salt; Disodium dichromium heptaoxide; Sodium bichromate, anhydrous CAS Number: 10588-01-9 (anhydrate); 7789-12-0 (dihydrate) CAS Name: Sodium dichromate EC (EINECS) Number: 234-190-3 Other identifier (Please specify): GPS0064

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

 Exposure can occur at either a sodium dichromate production facility or at other manufacturing, packaging or storage facilities that handle sodium dichromate. Persons involved in maintenance, sampling and testing activities, or in the loading and unloading of sodium 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 sodium 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 sodium dichromate. Please see the MSDS for additional information.

 Sodium dichromate is an odorless solid in the form of orange-red crystals or powder. It is stable under normal conditions of use and storage. Sodium 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. Sodium dichromate reacts violently with hydrazine, anhydride, ethanol, and sulfuric acid. Sodium dichromate is not compatible with oxidizing agents (such as perchlorates, peroxides, permanganates, chlorates, nitrates, chlorine, bromine and fluorine), and combustibles.

 Sodium dichromate can cause irritation or burns of the skin and eyes, sores or ulcers of the skin, and/or allergic contact dermatitis. If ingested, sodium dichromate may cause gastrointestinal irritation, nausea, vomiting and diarrhea, and damage to the liver and kidneys. Short-term inhalation of sodium dichromate dust or mist can cause irritation to the nose, throat and respiratory system

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.

 Prolonged or repeated inhalation exposures to sodium 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 sodium dichromate may also lead to asthmatic symptoms, such as wheezing and shortness of breath.

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

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

 Sodium 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  U.S. NTP TOX 72 - Sodium Dichromate Dihydrate  U.S. NTP TR 546 - Sodium dichromate dihydrate  WHO Environmental Health Criteria 61 - Chromium  WHO Guidelines for Drinking-water Quality - Chromium in Drinking-water

Version 1.0 Current Issue Date: February 2012 Document DOC Number: NAME GPS0062 Page 2 of 2 Page 2 of 2