PROBLEM TO BE SOLVED: To provide an N-(2-hydroxyalkyl)-N-alkylaminocarboxylic acid-type surfactant composition having excellent low-temperature stability and exhibiting excellent frothing power in a low-pH region.
SOLUTION: The N-(2-hydroxyalkyl)-N-alkylaminocarboxylic acid composition contains an N-(2-hydroxyalkyl)-N-alkylaminocarboxylic acid obtained by the addition reaction of an epoxyalkane to an aminocarboxylic acid and further contains ≤5 wt.% alkyldiol derivative compound expressed by general formula (4) (R
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