Patent ID: 8632758

Claim:
An aqueous hair cleansing agent (1) comprising components (A), (B) and (C): (A) sulfate anionic surfactant represented by the formula (1): R 1 O(CH 2 CH 2 O) n SO 3 M (1), wherein R 1 represents an alkyl group or alkenyl group having from 10 to 18 carbon atoms, M represents a cation derived from an alkali metal, an alkali earth metal, ammonium, alkanolamine or a basic amino acid, and n represents a number from 0 to 5 estimated based on the weight average, and wherein the content of the component (A) is from 1 to 25% by weight of the total aqueous hair cleansing agent; (B) an ether carboxylate anionic surfactant represented by the formula (2) or (3): R 2 O(CH 2 CH 2 O) m CH 2 COOX (2) R 2 C(═O)NH(CH 2 CH 2 O) m CH 2 COOX (3), wherein R 2 represents an alkyl group having from 12 to 16 carbon atoms, X represents a cation derived from an alkali metal, an alkali earth metal, ammonium, alkanolamine or a basic amino acid, and m represents a number of 0.5 to 10 estimated based on weight average, wherein the content of the component (B) is from 0.5 to 10% by weight of the total aqueous hair cleansing agent; (C) an organic carboxylic acid or a salt thereof, wherein the content of the (C) organic carboxylic acid or salt thereof is from 0.1 to 5% by weight of the total aqueous hair cleansing agent, wherein the organic carboxylic acid (C) is at least one acid selected from the group consisted of glycolic acid, lactic acid, malonic acid, maleic acid, and malic acid; and water, and (2) having a pH of from 1 to 5 at 25° C. when diluted 20-fold with water.