Surface active agents. Sulfated ethoxylated alcohols and alkylphenols. Determination of content of unsulfated matter PAS 15 Guidelines on how to manage

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Surface active agents. Sulfated ethoxylated alcohols and alkylphenols. Determination of content of unsulfated matter PAS 15 Guidelines on how to manage1 Scope This International Standard specifies a method for the determination of the content of unsulfated matter present in ordinary commercial neutralized products of sulfation of ethoxylated alcohols or alkylphenols [alkyl oxyethylene sulfates (ethoxylated alcohol sulfates) or alkylphenol oxyethylene sulfates (ethoxylated alkylphenol sulfates)] containing an average of not more than 20 oxyethylene groups per molecule.