Sodium Dodecyl Sulfate
time:2012-09-07 15:46:25,count:0
Ecology    may be hazardous to environment. Water body should be given special attention.
Reference[6]: goldfish absorb sodium dodecyl sulfate from solution principally through the gills, and that sodium dodecyl sulfate is rapidly distributed throughout the body tissues, the highest concentration being found in the gall bladder. Sodium dodecyl sulfate was metabolised by the fish to butyric acid-4-sulphate, and was excreted by the kidney. Over a 24h period 68% and 38% of a prescribled dose was excreted from freely fed and unfed fish, respectively.
Reference[7]: in sodium dodecyl sulfate solution, Artemia Parthenogenetica LC50: 13.9 mg/L/96h, lower toxicity; Moina Mongolica Daday LC50: 3.5 mg/L/72h, moderate toxicity.
HSDB[4], also review more ecotoxicity values, for example: Americamysis Bahia (Opossum Shrimp) EC50: conditions: saltwater, static, 20°C, pH 7.5-8.0, dissolved oxygen 70-121% saturated; concentration: 16.5mg/L/96h.
Biodegradability    biodegradable.
Reference[8]: degradation of sodium dodecyl sulfate in natural water body depends on the microorganisms, the optimum conditions: pH 6.5-9.4, about 36°C.
Characteristics    excellent foaming, cleansing, emulsifying, wetting, permeating, dispersing, solubilizing abilities. The most commonly used alkyl sulfates. The most typical use is foaming agent. Resistant to hard water.
Note    (1), Avoid using in children cleaning products, such as shower gels, shampoo, skin care products.
(2), In toothpastes, because unesterified dodecanol can bring bitter taste, recommend to choose sodium lauryl sulfate that content of not sulfated products is as low as possible.
(3), In hard water, there is a possibility that sodium lauryl sulfate solution is transparent in a concentration range, then transforms translucent state. At the same time, when concentration of sodium lauryl sulfate is higher than or lower than this concentration, the solution is transparent. The reason for this state may be related to water hardness, ionic strength, and so on.
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