||Chemical technology and economics in environmental perspective : Task IV - potential worker and consumer exposures to nitrilotriacetic acid (NTA) in detergents : final report /
Meiners, Alfred F. ;
Lapp, Thomas W. ;
Mumma, Charles E. ;
Poodrebarac, Eugene G. ;
Reisdorf, Robert P.
||Midwest Research Inst., Kansas City, MO.;Environmental Protection Agency, Washington, DC. Office of Toxic Substances.
|| U.S. Environmental Protection Agency,
||68-01-3896; EPA-560/11-79-008; EPA-68-01-3896
Nitrilotriacetic acid--Environmental aspects. ;
Industrial medicine ;
Air pollution ;
Nitrogen organic compounds ;
Occupational safety and health ;
Product safety ;
Toxic substances ;
Air sampling ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||40 pages : tables ; 28 cm
The current annual production of trisodium nitrilotriacetate in the United States is approximately 70 million pounds. The production of NTA is highly automated and is largely under remote controls; thus, production workers have little potential for exposure. Analysis of air in the workers' breathing zone indicated that the highest exposure area had an average potential exposure of 8.2 mg NTA/day. NTA was not detected in urine samples of production workers (detection limit, 0.5 mg/liter). The number of detergent production workers that would be directly exposed to airborne detergent dust is estimated to be 2,500; typical exposure during detergent formulation is estimated to be 338 micrograms/NTA/day. Consumer exposure to detergents can result from inhalation of detergent dust, percutaneous absorption from contact with wash water or direct skin contact with the detergent, ingestion of residue on dishes or utensils, and skin contact with residues in clothing. Estimates of the number of consumers potentially exposed (and the extent of exposure) are as follows: automatic clothes washing, 176 million (0.05 to 0.35 micrograms NTA/day); automatic dishwashing, 33 million (0.009 to 0.14 micrograms NTA/day); hand dishwashing, 171 million (8.75 to 17.5 micrograms NTA/day); residue on dinnerware, 40 million (4.9 to 966 micrograms NTA/day); and general cleaning, 176 million (8.75 to 17.5 micrograms NTA/day).
"EPA-560/11-79-008." "June 1979." "Prepared under Contract No. 68-01-3896."