Sodium tetradecyl sulfate
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|Other names||7-Ethyl-2-methyl-4-hendecanol sulfate sodium salt|
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|Chemical and physical data|
|Molar mass||316.43 g·mol−1|
|3D model (JSmol)|
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Sodium tetradecyl sulfate (STS) is a commonly used synonym for 7-ethyl-2-methyl-4-undecanyl sulfate sodium salt which is anionic surfactant that is the active component of the sclerosant drug Sotradecol. It is commonly used in the treatment of varicose and spider veins of the leg, during the procedure of sclerotherapy. Being a detergent, its action is on the lipid molecules in the cells of the vein wall, causing inflammatory destruction of the internal lining of the vein and thrombus formation eventually leading to sclerosis of the vein. It is used in concentrations ranging from 0.1% to 3% for this purpose. It is occasionally used for the treatment of stabilisation of joints that regularly dislocate, particularly in patients with Ehlers-Danlos syndrome.  In the UK, Ireland, Italy, Australia, New Zealand and South Africa, it is sold under the trade-name Fibro-Vein in concentrations of 0.2%, 0.5%, 1.0%, and 3%.
It may be prepared by the aldol condensation of methyl isobutyl ketone and 2-ethylhexanal (which is itself formed by the aldol self-concensation of butyraldehyde), followed by sulfonation of the resulting alcohol.
4. Medical research paper Dr Fraser Burling.
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