Where to buy lye for soap making

You can usually buy 100% sodium hydroxide for soap making at hardware stores, soap-supply shops, farm-supply stores, or online retailers. The safest choice is a soapmaking supplier or a product label that clearly says 100% lye / sodium hydroxide.

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Good places to look

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Place	What to check
Hardware stores	Look in the drain-cleaner or plumbing aisle for a product that is labeled 100% lye / sodium hydroxide.
Soap-making suppliers	These are often the most reliable option for pure lye intended for soap making.
Farm or chemical supply stores	Some sell sodium hydroxide in bulk, which can be cheaper per pound.
Online retailers	Specialty soap shops and marketplaces often carry pure lye in small or large quantities.

What to avoid

• Do not buy a drain cleaner unless the label and ingredient list confirm it is 100% sodium hydroxide.
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• Avoid products with extra additives, fragrances, or clumping agents if you want it for soap making.
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• Check the product details or safety data sheet before using it in soap recipes.
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Practical tip

If you only make small batches, a soap supply shop or a small online bottle is convenient. If you make soap regularly, bulk sodium hydroxide from a chemical or farm supplier may be cheaper.

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For a quick search, try phrases like “100% sodium hydroxide for soap making” or “lye for soap making supplier”.

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