| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a detergent composition for a hard disk substrate, which is excellent in washability of foreign matter remaining on the substrate and is capable of suppressing deterioration of surface roughness of the substrate, according to one or more embodiments.SOLUTION: One or more embodiments are related to a detergent composition for a hard disk substrate which contains alkyl diphenyl ether disulfonic acid having a straight-chain alkyl group or branched chain alkyl group with a carbon number 6-18 or its salt (A); a chelating agent (B); alkali metal hydroxide (C); and water.</p> |
