Certified Lye™

High-Quality Sodium Hydroxide (NaOH) and Potassium Hydroxide (KOH) for Making Soap

Buy LyeBuy ProtectionSafety PrecautionsSDS for LyeMake SoapSite MapPolicies

Lye (Sodium Hydroxide) and Caustic Potash (Potassium Hydroxide) Quality, Sizes, Prices, & Shipping

Lye (Sodium Hydroxide) and Potassium Hydroxide Quality

Certified Lye™ sells high-quality sodium hydroxide, potassium hydroxide, and other chemicals for making soap. Certified Lye™ sells dry solid lye as 99.99% pure sodium hydroxide microbeads. The remaining .01% of the mass within the canister is water vapor pulled from the air, due to the intense hygroscopic properties of lye. Never leave lye exposed to open air; replace the lid when not in use. If the lid is repeatedly left off of the canister for extended periods of time, the lye microbeads may eventually pull enough water vapor from the air to become moist and the microbeads of lye may cake together.

Certified Lye™ sells an extremely high-quality, food-grade lye, which is manufactured in the USA and is intended primarily for use in processing food and making soap. Our high-quality, food-grade lye meets the FCC and USDA standards for food uses, such as curing olives, hominy, century eggs, lutefisk and poaching German pretzels. Use Certified Lye™ food-grade lye for food preparation and soapmaking. Lower grades of lye are commonly used as drain openers or oven cleaners and may contain unwanted additives.

The caustic potash (potassium hydroxide) sold by Certified Lye™ also conforms to high quality standards and is over 99% pure KOH. It is sold as dry flakes for the primary purpose of creating liquid soap and cream soap but may also be used to make biodiesel fuel.

Canisters of Certified Lye sodium hydroxide and potassium hydroxide posing with bars of handmade soap.

Canister Size

Certified Lye™ packages high-quality sodium hydroxide microbeads in 20-ounce (1.25-pound) plastic canisters and high-quality potassium hydroxide flakes in 16-ounce (1 pound) plastic containers, which are both designed for resale. The 20- and 16-ounce plastic canisters are sealed with re-usable screw lids to prevent moisture damage. Generally, 20 ounces of lye (sodium hydroxide) will make approximately ten pounds of soap, which may be cut into about 40 regular size bars of soap. View photo of lye canister.

Lye Prices

Lye (sodium hydroxide) is sold as low as $5.99 per pound.

Price Discounts when Organization Members Buy Lye to Make Soap

Certified Lye offers special price discounts when certiain soapmakers buy lye to make soap. After verification of having donated soap to Soap Donation Center, donors receive a 5% refund. After verification of membership, Handcrafted Soap and Cosmetic Guild members receive a 5% refund. After verification of listing, Natural Soap Directory subscribers receive a 5% refund. After verification of class registration, students of the Soapmaking Studio receive a 5% refund. To request the refund, email info@certified-lye.com with your Natural Soap Directory subscription date or the HSCG discount code. Maximum refund per purchase is 5% of lye price; refunds may not be combined.

Lye (Sodium Hydroxide) Prices
Quantity Price per Lb Total Price Price After 5% Refund
1.25 lbs $6.39 $7.98 $7.58
2.50 lbs $6.39 $15.97 $15.17
3.75 lbs $6.39 $23.96 $22.76
5.00 lbs $6.39 $31.95 $30.35
6.25 lbs $6.39 $39.93 $37.93
7.50 lbs $6.19 $46.42 $44.09
15.00 lbs $6.19 $92.85 $88.20
30.00 lbs $5.99 $179.70 $170.71
45.00 lbs $5.99 $269.55 $256.07

Caustic potash (potassium hydroxide) is sold for $9.99 per pound and is not eligible for discounts.

Sponsor of Soap Donation Center, Inc. Certified Lye™ sponsors Soap Donation Center, Inc., a nonprofit charity that receives homemade soap and distributes it to those in need.

Member of the Handcrafted Soap and Cosmetic Guild Certified Lye™ is a member of the Handcrafted Soap and Cosmetic Guild.

Listed with the Natural Soap Directory Certified Lye™ is listed with the Natural Soap Directory.

Sold at the Soapmaking Studio in San Diego, CA Certified Lye™ brand lye and KOH are also sold at the Soapmaking Studio in San Diego, CA.

Lye Calculator & Recipe Formulator Lye Calculator & Recipe Formulator

Discounted Price on National Soapmaking Day

To celebrate and encourage participation in National Soapmaking Day, the last Sunday of September, all Certified Lye™ brand products are discounted by 5% for the entire day at the Soapmaking Studio in San Diego, CA.

Other Soapmaking Chemicals

In addition to sodium hydroxide for making bar soap and potassium hydroxide for making liquid soap, Certified Lye™ also sells potassium carbonate and phenolphthalein. Potassium carbonate can be used to thicken clear, liquid soap to a gel consistency without lessening the clarity of the soap. Phenolphthalein is used to test finished soap for excess alkali, such as the undesirable presence of un-reacted sodium or potassium hydroxide. Unlike other vendors, Certified Lye™ sells a strong, 5% phenolphthalein solution that produces unmistakable and reliable results. These additional soapmaking chemicals are available on the Buy Lye page.


Certified Lye™ ships lye throughout the United States and US territories. Lye can be delivered to any domestic destination, including Alaska, Hawaii, American Samoa, Federated States of Micronesia, Guam, Marshall Islands, Northern Mariana Islands, Palau, Puerto Rico, Virgin Islands, and all APO/FPO addresses. Lye cannot be shipped internationally to countries other than the USA. Canisters of lye are sent via an expedited air service that costs $21.99 or less for each package of twelve canisters (15 pounds) of lye. Certified Lye™ charges a hazmat handling fee of $2.99 or less per package.

For combined shipping, add both lye (Buy Lye) and protective equipment (Buy Protection) purchases to cart before checkout.

Upon checkout, enter the delivery address carefully and verify the accuracy of the delivery address. Certified Lye™ cannot ship lye to an address other than the address provided during checkout.

Buy LyeBuy ProtectionSafety PrecautionsSDS for LyeMake SoapSite MapPolicies

Certified Lye - Sodium Hydroxide for Making Soap
Certified Lye™ • PO Box 133, Spring Valley, CA 91976-0133, USATel: (619) 668-1435 • info@certified-lye.com
Certified Lye™ is a subsidiary of Acute Soap Enterprises, LLC