| abstract |
(57) [Problem] To provide a cleaning agent having excellent degreasing power and suppressing oxidative discoloration due to dissolved oxygen in water in the field of aqueous metal cleaning. SOLUTION: (A) 1 to 20% by weight of an alkali metal salt, (B) 10 to 10,000 ppm of a hydroxylamine compound represented by the following formula (1), (C) glycol ethers represented by the following formula (2) A metal cleaning agent which is an aqueous solution comprising 0.1 to 15% by weight. Embedded image (In the formula (1), R 1 and R 2 are hydrogen, an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, an alkanol group having 1 to 4 carbon atoms, or a cycloalkyl group.) ] (In the formula (2), R1 and R2 are hydrogen or a C1-10 Wherein n is 2 or 3, and m is an integer of 1 to 3. ) |