Ingredient Safety Information
Linear Alkylbenzene Sulphonate (LAS)
Linear Alkylbenzene Sulfonate (LAS) is the most widely used surfactants in the world, primarily in laundry detergents and cleaning products.
LAS is completely biodegraded aerobically. It can be completely biodegraded anaerobically as well, but only if oxygen is available initially, to start the process. In conventional sewage treatment plants, more than 99% of LAS is removed. Where soil is fertilized with sewage sludge, LAS will biodegrade rapidly to the point of complete removal.
LAS toxicity data (EC50) to aquatic organisms range between 1 and 10 mg per liter in short term tests. LAS is approximately equally toxic to fish and invertebrates, whereas toxicity to algae varies widely. LAS does not bioconcentrate in aquatic organisms because they are rapidly metabolised.
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LAS is completely biodegraded aerobically. It can be completely biodegraded anaerobically as well, but only if oxygen is available initially, to start the process. In conventional sewage treatment plants, more than 99% of LAS is removed. Where soil is fertilized with sewage sludge, LAS will biodegrade rapidly to the point of complete removal.
LAS toxicity data (EC50) to aquatic organisms range between 1 and 10 mg per liter in short term tests. LAS is approximately equally toxic to fish and invertebrates, whereas toxicity to algae varies widely. LAS does not bioconcentrate in aquatic organisms because they are rapidly metabolised.
Read more, ingredient info sheet
(PDF file)Put into filesafe
Visit also www.heraproject.com
Some Publications by P&G Scientists
- E.J. van de Plassche, J.H.M. de Bruijn, R.R. Stephenson, S.J. Marshall, T.C.J. Feijtel et S.E. Belanger. Predicted No-Effect Concentrations and Risk Characterization of Four Surfactants: Linear Alkyl Benzene Sulfonate, Alcohol Ethoxylates, Alcohol Ethoxylated Sulfates, and Soap. Environmental Toxicology and Chemistry, 18 (11), 2653-2663, 1999.
- T.C.J. Feijtel, J. Struijs et E. Matthijs. Exposure Modeling of Detergent Surfactants - Prediction of 90th-Percentile Concentrations in The Netherlands. Environmental Toxicology and Chemistry, 18 (11), 2645-2652, 1999.
- D.C. McAvoy, S.D. Dyer, N.J. Fendinger, W.S. Eckhoff, D.L. Lawrence et W.M. Begley. Removal of Alcohol Ethoxylates, Alkyl Ethoxylate Sulfates, and Linear Alkylbenzene Sulfonates in Wastewater Treatment. Environmental Toxicology and Chemistry, 17 (9), 1705-1711, 1998.
- W. de Wolf et T. Feijtel. Terrestrial Risk Assessment for Linear Alkyl Benzene Sulfonate (LAS) in Sludge-Amended Soils. Chemosphere, 36 (6), 1319-1343, 1998.
- P. Kloepper-Sams, F. Torfs, T. Feijtel, J. Gooch- Effects Assessments for Surfactants in Sludge-Amended Soils: a Literature Review and Perspectives for Terrestrial Risk Assessment. The Science of the Total Environment, 185, 171-185, 1996.
- R.A. Rapaport, W.S. Eckhoff. Monitoring Linear Alkyl Benzene Sulfonates in the environment: 1973-1986. Environmental Toxicology and Chemistry, 9 1245 -1257 1990.
