Could anyone please tell me the CAS number of the reagent R(OCH2CH2)7O(CH2)3SO3-K+ (R: C13-C15 alkyl chain) or tell me where I can purchase this reagent? Thanks in advence.
Best regards,
Peixin Du
Dear Peixin,
You can purchase it from Aldrich:
The corresponding sulfonate was prepared by
treating 1 g of the chloride analogue with 15 mL of a 10% w/v solution of R(OCH2CH2)7O(CH2)3SO3 -K+ (R: C13-C15 alkyl chain, Aldrich) in water at 70 °C for 24 h. The solvent was discarded and the material was washed several times with water and dried at 70 °C.
Although this compound was used many times in patents, It was a difficult mission to find the company makes it.
For more information, see attached file.
Hoping this will be helpful,
Rafik
Poly(ethylene glycol) n-alkyl 3-sulfopropyl ether potassium salt, also known as Ralufon F 11-13, CAS Number 119481-71-9. Sigma Aldrich no longer sells this product, but you can get it from BOC Sciences: http://www.bocsci.com/description.asp?cas=119481-71-9&cid=1
Dear Michael,
It is nice to hear from you again. You have disappeared during the holidays.
Happy new year,
Rafik
The compound listed by BOC sciences is the Polyethyleneglycol(7 EO) Alkyl 3-Sulfopropyl) diether, Potassium salt is CAS #119481-71-9 as per Scifinder. BOC sciences web site incorrectly shows this is RALUFON F 11-13, (which would be CAS #448209-75-4) ; I was only incorrect about the RALUFON designation!
As per Scifinder, BOC Sciences sells Polyethyleneglycol(7 EO) Alkyl 3-Sulfopropyl) diether, Potassium salt which is CAS #119481-71-9 this is apparently the compound you are looking for. The BOC sciences catalog number is the same as the CAS number (What a great idea!), You have to fill out a form on their website to get a price quote from them. I have purchased numerous chemicals from BOC Sciences over the past 10 years, some in bulk quantities, and find them to be a reputable company to deal with.
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