Laundry Detergent Without Sodium Lauryl Sulfate (SLS)

Last updated: September 2026

Quick verdict

Yes. Buy Molly’s Suds Original powder. Four minerals, optional peppermint oil. No sodium lauryl sulfate. No sodium laureth sulfate. The full comparison of non-toxic detergents is here. This page is only the SLS question.

People type “laundry detergent without sodium lauryl sulfate” because a bottle made their skin itch, or a dermatologist said to drop sulfates, or a “free and clear” jug still listed SLS in the small print. That is a label job, not a vibe. I compared current ingredient lists, the same Contact Dermatitis paper we already cite on the roundup, and IARC’s 1,4-dioxane note. I have not patch-tested these powders on anyone.

What SLS is

Sodium lauryl sulfate (also labeled sodium dodecyl sulfate) is a surfactant. It makes foam and cuts grease. Dermatologists use dilute SLS as a standard skin irritant in patch tests. In 2003, Löffler and Happle compared SLS, sodium laureth sulfate, and a milder alkyl polyglucoside on the same volunteers. SLS was the harsher detergent. Transepidermal water loss, a measure of barrier damage, was still elevated days later. (Contact Dermatitis, 2003, PMID 12641575)

SLS is not a proven human carcinogen. A lot of blogs mixed it up with something else. The skin story is real. The cancer story, for SLS itself, is not.

SLS vs SLES

SLES is sodium laureth sulfate (sometimes sodium lauryl ether sulfate). Chemists ethoxylate SLS to make it milder. That step can leave 1,4-dioxane, a contaminant, not an ingredient, so it often never appears on the panel. IARC classifies 1,4-dioxane as possibly carcinogenic to humans (Group 2B). (IARC, Vol. 71)

Short version: SLS is the irritant. SLES is the dioxane pathway. Plenty of supermarket detergents use one or both, including bottles that say “free and clear” because they dropped the perfume and kept the sulfate.

How to read the bottle

Skip sodium lauryl sulfate, sodium dodecyl sulfate, SLS.
Skip sodium laureth sulfate, sodium lauryl ether sulfate, SLES if you also want off the 1,4-dioxane path.
UK spelling is “sulphate.” Same chemicals.
“Coconut-derived surfactant” can still be SLS or sodium coco-sulfate. Plant origin is not a free pass.
Sodium coco-sulfate is not SLS. It is still a sulfate surfactant. If your filter is “no SLS,” it may pass. If your filter is “no sulfates,” it fails.

Which detergents skip it

Molly’s Suds Original powder is the clean match. Sodium carbonate, sodium bicarbonate, magnesium sulfate (Epsom salt), unrefined sea salt, optional essential oil. The brand lists no SLS and no SLES. Unscented if fragrance is the other problem. Powder can leave residue in cold, hard water. Warm the load, or add a splash of vinegar. Cardboard, not a jug.

Puracy and Dirty Labs sell liquids that advertise sulfate-free formulas and use enzymes for stains. Read the current bottle. Formulas move. They come in plastic. Fine if you need a liquid. Not the plastic-off pick.

Blueland laundry tablets kill the jug. Some ingredient lists still show sodium coco-sulfate. Blueland also says laundry tablets do not use SLS as a listed ingredient but may have traces. Do not treat that as the SLS-free answer.

ECOS is cheap and EPA Safer Choice. Plant-derived is not automatically SLS-free. Read that specific SKU.

Tide, Persil, and most “free and clear” supermarket bottles still run SLS or SLES. Fragrance-free is not sulfate-free.

Drawbacks

Powder is fussy in cold water. If it does not dissolve, you get grit, not a chemistry failure. Predissolve a scoop in warm water.
Mineral formulas are weaker on grease stains. Pretreat. Or keep a sulfate-free enzyme liquid for the soccer shirt.
SLS-free is not “non-toxic.” Fragrance, optical brighteners, and preservatives are separate lines. Molly’s unscented powder is the short list if you want all of those off too.
This does not fix microfiber. Synthetics still shed plastic in the wash. That is microplastics in laundry.

Which one to buy

The one: Molly’s Suds Original Laundry Powder. Unscented if you can. Peppermint if you want a smell and will accept the oil.

View Molly’s Suds on Amazon

Need enzymes: Puracy or Dirty Labs, and check the panel for sulfate-free the day you order. The rest of the field: best non-toxic laundry detergent.

Who should skip it

You only wanted a cheaper jug. ECOS might be that, and it might still have a sulfate. Read it.
You need a certified stain-lab score more than a four-ingredient powder. Look at the enzyme liquids, then come back to the label.
Your issue is dryer sheets and perfume, not SLS. Different job.

The Bottom Line

Laundry detergent without sodium lauryl sulfate is Molly’s Suds Original powder. No SLS, no SLES, short mineral list, cardboard box. SLS is an irritant, not a carcinogen. SLES is the 1,4-dioxane cousin. “Free and clear” does not mean either one is gone. If the wash is also shedding plastic, that is the microfiber page, not this one.

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