| 1079 | Potassium hydroxideCausicpotash, KOH, Koh/Ch63857, LYE, Normanal0,1-n, Potash, Potash lye, Potassa, Potassio, Potassium lye | | Fire Service Act | Type 4 Ignite liquid | Alcohol | Handling or storage; Submission of a notification in the case that the amount is 20-100% of the specified value; permit required in the case that the amount is >100% of the specified value (the sum of proportions is calculated when storing/handling multiple classes in the same place) | Fire and Disaster Management Agency | | Fire Service Act |
| 1621 | Potassium hydroxideCausicpotash, KOH, Koh/Ch63857, LYE, Normanal0,1-n, Potash, Potash lye, Potassa, Potassio, Potassium lye | | Poisonous and Deleterious Substances Control Act | Deleterious Substances | | Management of the storing amount; Locked storage; Showing “Deleterious substance, not for medical use” on containers and storage, restriction of manufacture, import, sale, and handling | Ministry of Health, Labour and Welfare | | Poisonous and Deleterious Substances Control Act |
| 1858 | Potassium hydroxideCausicpotash, KOH, Koh/Ch63857, LYE, Normanal0,1-n, Potash, Potash lye, Potassa, Potassio, Potassium lye | | Poisonous and Deleterious Substances Control Act | Deleterious Substances | | Management of the storing amount; Locked storage; Showing “Deleterious substance, not for medical use” on containers and storage, restriction of manufacture, import, sale, and handling | Ministry of Health, Labour and Welfare | | Poisonous and Deleterious Substances Control Act |