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Sodium Hydrosulfite is a white to grayish crystalline powder. In cosmetics and personal care products, Sodium Hydrosulfite is used in the formulation of body and hand products, deodorants, hair dyes and colors, and moisturizers.
Sodium Hydrosulfite is a chemical which reacts with oxidizing agents to lose electrons. Reducing agents such as Sodium Hydrosulfite commonly contribute hydrogen to other substances. They can be used as an antioxidant to scavenge oxygen and they have the ability to split disulfide bonds in hair and, therefore, find use as hair waving/straightening agents.
Sodium Hydrosulfite is often referred to as Sodium Dithionate. Water-soluble salts such as Sodium Hydrosulfite contain equivalent amounts of sodium cations and hydrosulfite anions in order to maintain electroneutrality.
The Food and Drug Administration (FDA) includes Sodium Hydrosulfite on its list of substances considered Generally Recognized As Safe (GRAS) as a substance migrating to food from paper and paperboard products. Sodium Hydrosulfite is also approved for use as an indirect food additive. It may be used as a component of textiles and textile fibers intended for repeated use.
The FDA's Select Committee on GRAS Substances (SCOGS) concluded that there was no evidence in the available information on Sodium Hydrosulfite (packaging) that demonstrates, or suggests reasonable grounds to suspect, a hazard to the public when it is used at levels that are now current or might reasonably be expected in the future.http://www.cfsan.fda.gov/~dms/opascogc.html
Link to FDA Code of Federal Regulations for Sodium Hydrosulfite
Sodium Hydrosulfite may be used in cosmetics and personal care products marketed in Europe according to the general provisions of the Cosmetics Regulation of the European Union.
Link to the EU Cosmetic Regulation: http://europa.eu/legislation_summaries/consumers/product_labelling_and_p...
Sodium Hydrosulfite is an inorganic salt. In cosmetics and personal care products, Sodium Hydrosulfite functions as a reducing agent.
Find out more about the regulation of Food Additives by the Food and Drug Administration
Food Ingredients and Packaging: http://www.fda.gov/Food/IngredientsPackagingLabeling/default.htm
Food Contact Substances: http://www.fda.gov/Food/IngredientsPackagingLabeling/PackagingFCS/defaul...
Substances Generally Recognized As Safe (GRAS): http://www.fda.gov/Food/IngredientsPackagingLabeling/GRAS/default.htm
Search the Code of Federal Regulations http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm
EU Cosmetics Inventory http://ec.europa.eu/consumers/cosmetics/cosing/
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