Acyl methyltaurates

N-acyl methyltaurates, N-acyl sarcosinates, acyl isethionates, IV-acyl polypeptide condensates, polyalkoxylated ether glycolates, monoglyceride sulfates, and fatty glyceryl ether sulfonates [1,23]. 

Skin penetration by acylglutamate has been found rather small compared to that of soap or alkylsulfate. The cytotoxicity of acylglutamate for human keratinocyte was significantly lower than for other anionics, including acyl-methyltaurate, as shown in Fig. 7. 

Acyl isethionatCy a-sulphonated fatty estery acyl methyltaurate. titration gives total active. After acid hydrolysis ... 

BEC titration in alkaline solution gives the sulphonated hydrocarbon plus twice the a-sulphonated fatty ester plus soap from the isethionate and acyl methyltaurate. 

Extraction of fatty acid gives the acyl isethionate plus the acyl methyltaurate. 

Total nitrogen on the original mixture gives the acyl methyltaurate. 

Synonyms N-Methyl-N-(tall oil acyl) taurine, sodium salt Sodium methyl tall oil taurate Sodium tall oil N-methyltaurate... 

In principle a large number of sulphonated amide surfactants can exist, but only acyl taurates and methyltaurates and sulphosuccinamates are of practical interest. 

The molecular weight of the fatty acid may be determined by titration or gas chromatography. Its iodine value may also be determined, since acyl taurates and methyltaurates are often oleic acid derivatives. 

The titration in acid solution measures acyl taurates or methyltaurates. The titration in alkaline solution measures the same actives plus soap. 

Extraction of fatty acid (acyl taurates and methyltaurates) Determination of taurine or methyltaurine (section 5.13.1)... 

These are named as derivatives of taurine (2-aminoethanesulfonic acid) and are also called taurides. The typical synthetic route involves reaction of sodium bisulfite and ethylene oxide to form sodium isethionate, reaction of the isethionate with methylamine to form sodium iV-methyltaurate, then subsequent reaction with the acyl chloride of a fatty acid to give the iV-acyl-Al-methyltaurate. Taurates have good tolerance to water hardness and find specialty applications in textiles and in detergent bars and shampoos. Taurates are sometimes classified as amphoteric surfactants. 

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