Product Images
(400g) Potassium Hydroxide CAUSTIC POTASH 90% Soap Making
In stock
Smart shoppers OnBuy it!
- Earn Cashback on every purchase – spend it instantly on your next order
- Free delivery – on millions of items across the site
- Customers love us – 128,000 Trustpilot reviews and an 'Excellent' rating
£16.99
FREE Delivery
1%
What is instant Cashback?
Learn More
Interest-free payment options available
See full product description & details
Delivery: Standard (Free) | Thu 9th - Fri 10th Jul
Sold by: HD Chemicals LTD
Returns: 30 days
180-day payment protection
Most Popular in Soap Making Kits
Description & Details
Summary
- drying and bleaching agent,
- absorption of carbon dioxide
- liquid soap making
- production of soft potassium soaps
- production of soft potassium soaps
(400g) Potassium Hydroxide CAUSTIC POTASH 90% Soap Making Description
Potassium hydroxide (caustic potash), KOH is an inorganic chemical compound that belongs to hydroxides. This is one of the strongest rules.
By default, potassium hydroxide is a white solid. In the form of a reagent, it is usually produced as fragile, crystalline and soft flakes or granules with about 15% water content. It has hygroscopic properties - larger than sodium hydroxide. It is very soluble in water, and the dissolution process is strongly exothermic. The solution called potassium lye has a strongly alkaline reaction. Potassium hydroxide and its aqueous solution absorb carbon dioxide from the air, which results in the formation of potassium carbonate. For this reason, these substances should be stored in sealed containers. Potassium hydroxide is highly corrosive and can cause severe burns. After ingestion, the esophagus and stomach may burn and may even perforate.
Specification
Name: Potassium hydroxide
Synonyms: caustic potassium, caustic potassium, potassium hydroxide
Species: clean
Purity: min 90%
Chemical formula: KOH
Application
a drying and bleaching agent,
absorption of carbon dioxide,
a strong rule used in chemistry,
obtaining other potassium compounds (eg potassium salts),
production of soft potassium soaps,
making dies in lithography,
electrolyte (eg in nickel-cadmium batteries),
the distribution of the human body in the resomation process,
an aqueous 5% solution of potassium hydroxide is used to identify the rhubarb mullet (the pores of the mushroom turn purple),
texture of silicon wafers.
Details
| OPC | P8VWSV7 |
|---|---|
| Brand | HD Chemicals LTD |
| Codes | 7426836180243 (EAN) |
| Rank | #1 Candle & Soap Making |
| #1 Soap Making Kits | |
| #15 Other Crafts |
Compare Sellers for (400g) Potassium Hydroxide CAUSTIC POTASH 90% Soap Making
- New from £16.99
| Seller | Ratings | Warranty | Returns | Price | Delivery | Total | Quantity |
|---|---|---|---|---|---|---|---|
| (58 reviews) | - |
30 Days
Free Returns No
|
£16.99
|
+Fast & Free Delivery
Est. Delivery:
9th-10th Jul
|
£16.99
|
Reviews of (400g) Potassium Hydroxide CAUSTIC POTASH 90% Soap Making
All OnBuy Reviews are Verified Reviews
Overall Rating:
Highest Rated Review
Posted
22/05/2026
Sold By HD Chemicals LTD
very happy easy to use to use site great product fast delivery.
Filter Reviews
very happy easy to use to use site great product fast delivery.
As advised
I'm very pleased with this product, used and tested it when making liquid soap, would highly recommend this company as well as the product sold.
Accurately described, highly recommended for soap makers, I'm very allergic to certain chemicals, this doesn't cause serious skin damage. Achieved excellent results with my liquid soap.
Very happy with the product. Arrived on time, great value!
Earn as you shop with instant Cashback on everything.
No catch, no cost
- Paid into your OnBuy account
- Spend it on your next purchase
- Save it or withdraw it
Become a Cashback VIP
Just 1 purchase unlocks bigger deals & rates