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Permeation of malathion through glove materials.

Authors
Lin-W; Que Hee-SS
Source
Appl Occup Environ Hyg 1998 Mar; 13(3):158-165
NIOSHTIC No.
00241991
Abstract
A study was done to investigate malathion (121755) permeation through several rubber glove materials using an American Society for Testing and Materials (ASTM) type permeation cell and to study how the carrier, whether water, hexane, or meta(m)-xylene, affected the permeation of malathion through the various materials. Potential malathion exposures were highest when handling pure and technical grade materials and emulsifiable concentrations. Two formulations were tested: Aqua Malathion and Prentox Malathion. The major alkylbenzene inert components in both Prent and Aqua were xylenes, trimethylbenzenes, ethyl-toluenes, and propyl-benzenes. Pure malathion, undiluted malathion formulations, and 50 percent malathion/m-xylene (1330207) permeated through nitrile within 8 hours, but not through Viton or Silver Shield gloves. Malathion in a commercial formulation, in m-xylene mixtures, and in a formulation mixed with m-xylene, permeated through nitrile with slower steady state permeation rates, longer breakthrough times, and longer lag times than pure liquid malathion due to dilution and the modulating effects of the more nonpolar inert components. The influence of the carrier was also evident. The authors conclude that the bulk properties of the challenge solutions determined the permeation of the individual mixture components as well as dilution effects. Nitrile gloves should be replaced every 60 minutes when handling these two formulations. However, they will not protect against pure technical malathion. Nitrile can be used for at last 4 hours to protect against diluted formulations and diluted pure/technical malathion.
Keywords
NIOSH-Publication; NIOSH-Grant; Control-technology; Protective-clothing; Personal-protective-equipment; Gloves; Hand-protection; Pesticides; Agricultural-chemicals; Organo-phosphorus-compounds; Organo-phosphorus-pesticides; Exposure-assessment; Exposure-levels; Exposure-limits
Contact
Environmtl/occupatnl Hlth Scis UCLA School of Public Health 10833 LE Conte Avenue Los Angeles, CA 90024-1772
CODEN
AOEHE9
CAS No.
121-75-5; 1330-20-7
Publication Date
19980301
Document Type
Journal Article
Funding Amount
269507
Funding Type
Grant
Fiscal Year
1998
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-02951
Issue of Publication
3
ISSN
1047-322X
Priority Area
Research Tools and Approaches: Intervention Effectiveness Research
Source Name
Applied Occupational and Environmental Hygiene
State
CA
Performing Organization
University of California Los Angeles, Los Angeles, California
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