| What is it? |
Sodium Lauryl Sulfoacetate (SLSa) is a solid anionic surfactant of vegetable origin. It meets ECOCERT standards. It is not the same thing as Sodium Lauryl Sulfate (SLS)—it is a much gentler surfactant. |
| INCI |
Sodium Lauryl Sulfoacetate |
| Appearance |
A very fine white powder. |
| Usage rate |
Sodium Lauryl Sulfoacetate (SLSa) is non-irritating to the skin at up to 70% |
| Texture |
Fine powder. |
| Scent |
Characteristically soapy/detergent-y. |
| Active Surfactant Matter |
65% |
| pH |
5–7.5 (5% solution) |
| Charge |
Anionic |
| Solubility |
Water |
| Why do we use it in formulations? |
It offers fantastic, rich lather to our products. Due to the small particle size it readily dissolves in water, making it a great choice for things like bath bombs and foaming bath salts. |
| Do you need it? |
I’d highly recommend it, but it isn’t essential. |
| Strengths |
Wonderful, rich, long-lasting lather. |
| Weaknesses |
Inhaling it is beyond wretched. |
| Alternatives & Substitutions |
As a bare minimum you’ll need a different solid anionic surfactant. You’ll also need to watch the active surfactant matter (you may need to use a different quantity of the new surfactant to get the same ASM level in the end product) and the pH of the final product. |
| How to Work with It |
Wear a dust mask! Inhaling airborne powdered surfactants is unbelievably unpleasant. You can dissolve it into the heated water phase for liquid concoctions, or stir/mash the powder into blends of butters and/or other surfactants to create syndet bars. It can also be added to the powder phase of bath bombs and other bath products. |
| Storage & Shelf Life |
Stored somewhere cool, dark, and dry, SLSa should last for two years. |
| Tips, Tricks, and Quirks |
SLSa is an easy way to make almost anything foam! |
| Recommended starter amount |
250g (0.5lb) |
| Where to Buy it |
Buy it from an online DIY ingredient supplier or Amazon. |
Want to compare different surfactants?
Check out my super-useful surfactants table!
Some Formulations that Use Sodium Lauryl Sulfoacetate
- Mini Formulation Makeover: Shea Butter & Citrus Shampoo Bar (c. 2012)
- Charcoal & Bentonite Clarifying Shampoo Bar
- Creamy French Shampoo Bar
- Calendula & Chamomile Powdered Body Wash
- Castor & Rice Sulfate-Free Shampoo Bar
- Winter Wonderland Shimmery Foaming Bath Salts
- Simple Sulfate-Free Shampoo Bar
- Christmas Spice Soft Foaming Sugar Scrub
- Sulfate-Free Shampoo Bar with Rice Starch
- Ice Palace Sulfate-Free Shampoo Bar
- French Green Clay Sulphate-Free Shampoo Bar
- Chocolate Ganache Fizzing Bath Biscuits
- Pink Clay Mosaic Shampoo Bars
- White Chocolate Peppermint Shampoo Bars
- Christmas Tree Foaming Whipped Body Scrub
- Whipped Minty Foot Scrub
- Foaming Coconut Bath Milk
- Five Alive Citrus Bath Parfait
- Fizzy Unicorn Bath Parfait
- Snowflake Bath Bombs