[{"from": "human", "value": "Please give me some details about this molecule. [C][C][C][C][C][Branch1][Ring1][C][C][C][C][C][Branch1][#Branch1][C][C][Branch1][C][C][C][O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an anionic surface-active agent which is used for its wetting properties in the industry and is also used in medicine as a blood vessel irritant and sclerosing agent for hemorrhoids and varicose veins.  Sodium tetradecyl sulfate has been widely used since the 1950s, and in 1978 the first successful report of injecting a 1% solution into spider angiomas in 144 patients was made. Also noted was an unspecified number of episodes of epidermal necrosis without significant long-term effects and a 30% incidence of post-sclerosis pigmentation that resolved within a few months."}]