Environmental Sustainability
YKK Restricted Substance List
In recent years, the impact of chemicals used in the supply chain on human health and the environment is gaining greater attention. YKK is working to eliminate hazardous chemicals from the manufacturing process and has created "YKK RSL," which is referenced from OEKO-TEX 
and the Manufacturing Restricted Substances List (MRSL) of Zero Discharge of Hazardous Chemicals (ZDHC). By 2020, YKK aims to eliminate the following major substances.
| NO. | Chemical Group | Utilization |
|---|---|---|
| 1 | Surfactant | Detergent agent, Degreasing agent |
| 2 | Halogenated Solvents | Paint remover, Cleaning agent |
| 3 | Organic Tin Compound | Paint, Resin |
| 4 | PFC's, Perfluorinated Compounds | Water repellent agent |
| 5 | Phthalates | DPaint, Resin |
| 6 | Heavy Metals | Paint, Metal, Resin |
| 7 | Other banned dyestuffs | Coloring agent |
| 8 | PAH (Polycyclic Aromatic Hydrocarbons) | Paint |