TOXICOLOGICAL PROFILE FOR CHROMIUM - Davidborowski.com
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TOXICOLOGICAL PROFILE FOR CHROMIUM - Davidborowski.com

TOXICOLOGICAL PROFILE FOR CHROMIUM - Davidborowski.com TOXICOLOGICAL PROFILE FOR CHROMIUM - Davidborowski.com

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10.07.2015 Views

CHROMIUM 2723. CHEMICAL AND PHYSICAL INFORMATIONand may have anti-diabetic effects (Broadhurst et al. 1997). It has also been shown to be absorbed morereadily than chromium obtained from food sources (Gargas et al. 1994). Unfortunately, the mechanism oftransport and absorption of chromium picolinate has not been determined. Recently, a spectroscopicanalysis of this compound has shown that chromium picolinate is a very stable complex in the body andits absorption properties may be due to its ability to cross membranes readily (Chakov et al. 1999).

CHROMIUM 2734. PRODUCTION, IMPORT/EXPORT, USE, AND DISPOSAL4.1 PRODUCTIONTable 4-1 lists the facilities in each state that manufacture or process chromium, the intended use, and therange of maximum amounts of chromium that are stored on site. There are currently 3,391 facilities thatproduce or process chromium in the United States. The data listed in Table 4-1 are derived from theToxics Release Inventory (TRI97 1999). Only certain types of facilities were required to report.Therefore, this is not an exhaustive list.Chromium metal is commercially produced in the United States by the reduction of chromite ore withcarbon, aluminum, or silicon, and subsequent purification. Sodium chromate and dichromate areproduced by roasting chromite ore with soda ash. Most other chromium compounds are produced fromsodium chromate and dichromate (Hartford 1979; Westbrook 1979). For example, basic chromic sulfate(Cr(OH)SO 4 ), commonly used in tanning, is commercially produced by the reduction of sodiumdichromate with organic compounds (e.g., molasses) in the presence of sulfuric acid or by the reductionof dichromate with sulfur dioxide. Lead chromate, commonly used as a pigment, is produced by thereaction of sodium chromate with lead nitrate or by reaction of lead monoxide with chromic acid solution(IARC 1990).In 1997, the major manufacturers of chromium compounds were: (1) chromic(VI) acid, includingchromic(VI) anhydride and chromic(VI) trioxide (total capacity 76,000 metric tons): American Chrome& Chemicals Inc., Corpus Christi, Texas; Occidental Chemical Corporation Specialty Business Group,Castle Hayne, North Carolina; (2) chromium(III) sulfate: Blue Grass Chemical Specialties, L.P., NewAlbany, Indiana; Johnson Matthey, Inc., Ward Hill, Massachusetts; Wayne Chemical Corp., Amarillo,Texas, Dakota City, Nebraska, and Milwaukee, Wisconsin; (3) chromium(III) acetate: Blue GrassChemical Specialties, L.P., McGean-Rohco, Inc., Cleveland, Ohio; The Shepard Chemical Company,Cincinnati, Ohio; (4) chromium acetylacetonate: MacKenzie Corporation, Bush, Louisiana; The ShepardChemical Company, Cincinnati, Ohio; (5) chromium boride: Cerac Incorporated, Milwaukee, Wisconsin;Johnson Matthey, Inc., Alfa Aesar, Ward Hill, Massachusetts; (6) chromium(III) chloride: Blue GrassChemical Specialties, LP, New Albany, Indiana, McGean-Rohco, Inc., Cleveland, Ohio; (7) chromiumdiboride: Johnson Matthey, Inc., Ward Hill, Massachusetts; (8) chromium dioxide: DuPont, DuPontDiversified Businesses, Newport, Delaware; (9) chromium 2-ethylhexanoate: OM Group, Inc., Franklin,Pennsylvania, The Shepherd Chemical Company, Cincinnati, Ohio; (10) chromium fluoride: Atotech

<strong>CHROMIUM</strong> 2723. CHEMICAL AND PHYSICAL IN<strong>FOR</strong>MATIONand may have anti-diabetic effects (Broadhurst et al. 1997). It has also been shown to be absorbed morereadily than chromium obtained from food sources (Gargas et al. 1994). Unfortunately, the mechanism oftransport and absorption of chromium picolinate has not been determined. Recently, a spectroscopicanalysis of this <strong>com</strong>pound has shown that chromium picolinate is a very stable <strong>com</strong>plex in the body andits absorption properties may be due to its ability to cross membranes readily (Chakov et al. 1999).

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