Sodium dodecyl poly (oxyethylene) sulfate

Structural formula
n = 1-4
General
Surname	Sodium dodecyl poly (oxyethylene) sulfate
other names	SLES Sodium lauryl ether sulfate SODIUM LAURETH SULPHATES ( INCI )
Molecular formula	C 12 H 26 NaO 4 S • (C 2 H 4 O) n
Brief description	yellowish paste or liquid (70% or 28% in water)
External identifiers / databases
CAS number 15826-16-1 9004-82-4 (hydrogen sulfate) EC number 239-925-1 ECHA InfoCard 100.036.281 Wikidata Q412561
properties
Molar mass	~ 420 g mol −1
Physical state	liquid
density	1.05 g cm −3 (10% solution in water)
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 315-318 P: ?
Toxicological data	1995 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium dodecyl poly (oxyethylene) sulfate ( sodium lauryl ether sulfate ; English sodium laureth sulfate , SLES ) is an ether sulfate , the ethoxylated form of sodium lauryl sulfate and is one of the anionic surfactants . Common commercial forms are aqueous preparations with 70% (pasty) or 28% (liquid) detergent substance.

presentation

Dodecanol is first reacted with ethylene oxide . The number of oxyethylene units is usually around 2. Sulfur trioxide is then used to sulfate. This produces 1,4-dioxane, which is harmful to health, as a by-product .

The product with two oxyethylene units, sodium 2- (2-dodecyloxyethoxy) ethyl sulfate ("Sodium Laureth Sulfate Glycol"), is classified as irritating to the skin and eyes.

use

Sodium lauryl ether sulfate is a strong oil and grease dissolving cleaning agent. Due to its additional foaming property, SLES is used in many personal hygiene products, but also for the production of foam concrete , as a foaming agent and as a degreaser . SLES is used in toothpastes , shampoos , cosmetics, shower gels, liquid soaps, etc.

Hazard warnings

SLES is considered to be a skin irritant and can lead to dehydration of the skin. There is no scientific evidence available for the occasionally assumed carcinogenic (carcinogenic) effect.

Individual evidence

1. ↑ Entry on SODIUM LAURETH SULFATE in the CosIng database of the EU Commission, accessed on December 28, 2019.
2. ↑ ^{a b c} Entry on sodium lauryl ether sulfate. In: Römpp Online . Georg Thieme Verlag, accessed on June 15, 2014.
3. ↑ PBT assessment of sodium laureth sulphate
4. ↑ There is not yet a harmonized classification for this substance . A labeling of sodium 2- (dodecyloxy) ethyl sulphate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on November 27, 2018, is reproduced from a self-classification by the distributor .
5. ↑ Entry on sodium dodecyl poly (oxyethylene) sulfate in the ChemIDplus database of the United States National Library of Medicine (NLM), accessed on November 27, 2018.
6. ↑ External identifiers or database links for sodium 2- (2-dodecyloxyethoxy) ethyl sulfate : CAS number: 3088-31-1, EC number: 221-416-0, ECHA InfoCard: 100.019.469 , GESTIS - Substance database : 114163 , PubChem : 23682204 , ChemSpider : 17316 , Wikidata : Q26203284 .
7. ↑ Entry on sodium 2- (2-dodecyloxyethoxy) ethyl sulfate in the GESTIS substance database of the IFA , accessed on February 8, 2018(JavaScript required) .
8. ↑ Technical data sheet Schaumbildner 285 (PDF; 27 kB) from BASF, accessed March 29, 2013.
9. ↑ codecheck.info: Products that contain sodium lauryl ether sulfate.
10. ↑ Entry on Sodium laureth sulfate in the Consumer Product Information Database , accessed on December 19, 2019 .
11. ↑ TU-Berlin about false reports on the Internet regarding SLES .
12. ↑ On the assumed carcinogenic effect ( Memento of February 23, 2006 in the Internet Archive ).