Castile Soap

What is a Castile Soap?

What is a castile soap

What is a Castile Soap?

A castile soap is essentially soap made by saponifying vegetable oils with lye. Traditionally, castile soap are made with olive oil from Spain’s castile region, hence the name castile soap. Over time, a castile soap have taken on a new meaning of soap made with vegetable oils. A pure castile soap is an eco friendly and vegan soap (if it does not contain any animal by products e.g. goat’s milk).

A castile soap can either be found in liquid or bar soap form and both are considered equally good. It really depends on your intended use of it and personal preferences. Castile soap made from natural vegetable oils without added chemical e.g. SLS, SLES are an excellent non toxic cleanser for children and pets.

What are the benefits of Castile Soap?

Castile soap is completely natural with no harsh chemical additives or detergents. It is non-toxic, antibacterial, anti-fungal, an antioxidant and offers deep moisturising effects whilst being 100% biodegradable.

How is Castile Soap made?

Castile soap is made by saponifying vegetable oils with either sodium hydroxide for bar soap or potassium hydroxide for liquid soap. The saponification process is a simple one-step reaction with no waste generated: the glycerin is split off from the fatty acids, and the fatty acids combine with the sodium or potassium to form soap, while the hydroxide forms water. The result is soap, glycerin and water (no alkali remains).

What is the difference between Castile Soap and Detergent?

If a liquid soap isn’t made with either plant or animal based fats, they’re not soaps at all, they’re detergents. Detergents are different to soaps in that they’re often synthetic and they work slightly differently.

How to differentiate real soaps and detergents?

Take a closer look at the ingredients list. Castile liquid soaps will list potassium hydroxide while castile bar soaps will list sodium hydroxide in their ingredients lists. Detergents will use some kind of surfactant. These might be naturally derived, like cocoamidopropyl betaine from coconut or polyglucoside, or they could be synthetic, like sodium lauryl sulfate (SLS). So if you’re seeing ‘soaps’ with surfactants in them, they’re actually detergents.

Should I use a Castile Soap or a Detergent?

If you are looking for a cleanser that’s totally natural, go for a Castile Soap, as Castile soaps are made from natural ingredients, whereas Detergents are made from synthetic ingredients.

Where can I buy Castile Soap?

Singapore Soap is local manufacturer of liquid castile soap and castile soap bars in Singapore. Singapore Soap has one of the best quality liquid castile soap and castile soap bars available at fantastic wholesale prices. As a local producer of castile soap, our products will be cheaper than any castile soap found commercially in the market. Here are some of our range of castile soap bar and liquid below.


About carefully source and select quality and cost effective ingredients to ensure our customers receives only the best quality products at the most economical wholesale price. Find best soap and candle making supplies in Singapore by shopping with us. We deliver anywhere: Singapore and International.

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