Detergent powder looks simple, but every scoop is a balanced system of raw materials, each with a specific job: removing soil, softening water, keeping dirt from redepositing, making whites brighter and keeping the powder free-flowing. This guide lists the raw materials used in detergent powder manufacturing and explains what each one does.
1. Surfactants: the cleaning agents
Surfactants lift soil and oil off fabric and hold them in the wash water. They are the most important and usually the most expensive part of the formula.
- LABSA: the primary surfactant in most Indian detergent powders. It is neutralised with soda ash or caustic soda during mixing to form LAS.
- MES (Methyl Ester Sulfonate): a bio-based anionic surfactant with strong hard-water tolerance, used to replace part of the LABSA or as a co-surfactant.
- AOS and SLS: co-surfactants that boost foam and cleaning.
- Non-ionic surfactants such as Alphox 200: improve removal of oily and greasy soil.
2. Builders: softening the water
Calcium and magnesium in hard water react with anionic surfactants and reduce their cleaning power. Builders bind or remove these minerals so the surfactant can do its job.
- STPP (Sodium Tripolyphosphate): a highly effective builder that sequesters hardness ions and helps suspend soil.
- SHMP (Sodium Hexametaphosphate): a sequestering agent used for water softening.
- Zeolite: a phosphate-free builder that exchanges hardness ions, used in phosphate-free formulas.
3. Alkalis: boosting cleaning and neutralising
- Soda ash (sodium carbonate): raises wash pH for better soil removal, softens water by precipitation and neutralises LABSA.
- Caustic soda (sodium hydroxide): a strong alkali used to neutralise LABSA in some processes.
- Sodium silicate: adds alkalinity, protects washing machine parts against corrosion and helps powder structure.
4. Fillers and processing aids
- Sodium sulphate (anhydrous): the main filler. It adds bulk, keeps the powder free-flowing and lets the brand set the dose per scoop.
- Calcite or dolomite: low-cost fillers used in economy powders.
5. Performance and finishing additives
- Optical brightener (CBS-X): absorbs ultraviolet light and re-emits it as blue light, making whites look whiter.
- CMC (carboxymethyl cellulose): an anti-redeposition agent that stops loosened dirt settling back onto fabric.
- Enzymes: protease, amylase and others that break down protein and starch stains.
- Perfume and colour speckles: create the brand's fragrance and visual identity.
Raw materials at a glance
| Function | Raw materials | What it does |
|---|---|---|
| Surfactant | LABSA, MES, AOS, SLS, non-ionics | Removes and suspends soil |
| Builder | STPP, SHMP, zeolite | Softens water, boosts surfactants |
| Alkali | Soda ash, caustic soda, sodium silicate | Raises pH, neutralises LABSA |
| Filler | Sodium sulphate, calcite | Adds bulk, keeps powder free-flowing |
| Brightener | CBS-X optical brightener | Makes whites look brighter |
| Anti-redeposition | CMC | Stops dirt settling back on fabric |
| Finishing | Enzymes, perfume, colour | Stain removal and brand identity |
How detergent powder is made
Small and mid-sized manufacturers usually use the dry-mix process: LABSA is neutralised with soda ash in a mixer, then builders, fillers and additives are blended in, and the powder is sieved and packed. Large plants use spray drying, where a liquid slurry of the ingredients is sprayed into a hot tower to form light, hollow granules, and heat-sensitive ingredients such as enzymes and perfume are added afterwards.
Sourcing detergent raw materials from one supplier
Atharva Science supplies most of the raw materials on this list from Surat, Gujarat, including LABSA, MESAPON® MES, AOS, SLS, STPP, SHMP, caustic soda, sodium sulphate and CBS-X. Browse the full product catalogue or request a quote for your formulation.