Sodium hydroxide is a builder that can also be found in detergents and degreasers. We use it to make a product formula clean better by affecting the molecules in the formula so they work together better. Sodium hydroxide can also be a pH adjuster that alters the pH of a product to improve stability. Every formula has an optimum pH to make it work best. For example, a formula that’s more acidic works better for soap scum removal. Its opposite, a formula that’s more alkaline, might be more effective at removing grease or greasy soils. We use pH adjusters to make sure we achieve the best pH for a particular job. Also, the pH of a formula can affect how long it lasts within a container – for example limiting its tendency to corrode a can, container or dispenser. In high concentrations (such as in drain cleaners), sodium hydroxide can also be used as a caustic that helps dissolve organic matter like drain clogs.
各类碱性化学物都能溶解油脂。
常用最弱的是碳酸氢钠（小苏打，baking soda, Sodium bicarbonate）
中等的是酸氢钠（纯碱、石碱，soda ash, sodium carbonate）--- 建议戴防护手套。
最强的是氢氧化钠（烧碱，lye, sodium hydroxide) --- 绝对要戴防护手套！
烧碱的腐蚀性非常强，要非常小心！
Home Depot 能买到“drano”里面有效成分就是烧碱。
https://www.homedepot.com/p/Drano-Commercial-Line-17-6-oz-Kitchen-Granules-Clog-Remover-699031/303113302
https://www.whatsinsidescjohnson.com/us/en/brands/drano/drano-liquid-clog-remover
DIY 做“有机”肥皂就是用烧碱放进食用油，产生皂化反应。
https://www.nycoproducts.com/resources/blog/cleaners-degreasers-blurred-lines/#:~:text=Grease%20is%20an%20organic%20soil,proteins%20typically%20found%20in%20kitchens.
油脂在酸性物质中会不会反应我不知道。大家可以做个实验：弄一小块黄油（butter）或一小勺椰子油放在容器里，分别加小苏打、白醋，看哪个更能化解。
我中学、大学学的化学基本上都忘干净了。投坛能人成分都比较高，希望有人能澄清到底用酸还是碱化解管道油脂
1寸半的管子只剩下半寸了
当然还有更大的：
我的疑惑是醋是否有用
Drano 产品介绍说碱性化油脂，酸性去soap scum：
Sodium hydroxide is a builder that can also be found in detergents and degreasers. We use it to make a product formula clean better by affecting the molecules in the formula so they work together better. Sodium hydroxide can also be a pH adjuster that alters the pH of a product to improve stability. Every formula has an optimum pH to make it work best. For example, a formula that’s more acidic works better for soap scum removal. Its opposite, a formula that’s more alkaline, might be more effective at removing grease or greasy soils. We use pH adjusters to make sure we achieve the best pH for a particular job. Also, the pH of a formula can affect how long it lasts within a container – for example limiting its tendency to corrode a can, container or dispenser. In high concentrations (such as in drain cleaners), sodium hydroxide can also be used as a caustic that helps dissolve organic matter like drain clogs.
为避免管道腐蚀，家里还是用比较弱碱性的化学品，比如小苏打或纯碱
现在常把油脂冷冻起来，到收垃圾那天装入compostable bag。