Hydrophilic group-modified organopolysiloxane and production method thereof

A hydrophilic group-modified organopolysiloxane represented by the following general formula (1):

• wherein R1 is a group selected from alkyl groups having 1 to 30 carbon atoms, aryl groups having 6 to 30 carbon atoms, aralkyl groups having 7 to 30 carbon atoms, and organic groups represented by the following general formula (2):
• wherein R3 is a group selected from a hydrogen atom, monovalent hydrocarbon groups having 1 to 4 carbon atoms and acyl groups represented by R4C(═O)—,
• wherein R4 is a monovalent hydrocarbon group having 1 to 30 carbon atoms;
• “c” is an integer of 2 to 200;
• “d” is an integer of 0 to 200;
• and “c+d” is 3 to 200;
• when a polyoxyalkylene moiety of “c” and “d” comprises both an ethylene oxide unit and a propylene oxide unit, these units optionally form either a block polymer or a random polymer;
• and “m” is an integer of 0 to 15
• and each R1 is identical to or different from one another;
• and R2 is a hydrophilic group represented by the following general formula (3):
• wherein Q is a divalent hydrocarbon group having 3 to 20 carbon atoms, which optionally contains an ether bond or an ester bond;
• and X is a monovalent hydrophilic group comprising polyoxyalkylene, glycerin, or sugar;
• “a” is a number satisfying 1.0≤a≤2.5;
• and “b” is a number satisfying 0.001≤b≤1.5,
• the hydrophilic group-modified organopolysiloxane comprising 0.03 mol % or less of silanol groups at siloxane chain terminals, and 15 ppm or less of propionaldehyde after the organopolysiloxane is mixed with pure water at a mass ratio of 1:1 and mixed at 50° C. for 24 hours.