The Role of Chemicals in Cleaning & Detergent Products

When a single drop of dishwashing liquid instantly breaks up a layer of grease, or a laundry powder lifts the most stubborn stain, it is not the work of one ingredient but of a complementary chemical orchestra. Surfactants lift the soil, builders soften the water, alkalis saponify the grease, chelators bind metals, foam-control additives keep the balance, and fragrances give the finished product its identity. In this guide, Yüksek Kimya explains, from a practitioner's point of view, what the main raw-material groups inside a cleaning product do and how they work.

Why Does a Detergent Contain So Many Ingredients?

A modern detergent formula is far more than a single "cleaner." Each component solves a specific problem, and these problems all appear at once: water is hard, soil is both greasy and particulate, stains may be protein-based or oxidised, and the medium may be either very acidic or very alkaline. For this reason a good formula distributes the tasks among specialised raw materials.

A typical detergent contains the following functional groups:

• Surfactants (surface-active agents): The cleaning core that lifts soil from the surface and keeps it suspended in water.
• Builders: The building blocks that bind water hardness, buffer pH and support the surfactant (STPP, soda ash, zeolite).
• Alkalis: Components that raise pH to saponify oil and grease (caustic soda, soda ash, sodium metasilicate).
• Chelators (sequestrants): Protectants that bind metal ions (EDTA, citrate, phosphonates).
• Foam-control additives: Agents that boost or suppress foam.
• Adjuncts: Enzymes, optical brighteners, bleaches, fragrance, colourants and fillers.

Bringing these groups together in the right proportions is the engineering discipline known as "formulation." Raw-material quality and compatibility directly determine the performance of the finished product.

Surfactants: The Core of Cleaning

Water and oil naturally repel each other, and surfactants are exactly what break down this boundary. Every surfactant molecule is amphiphilic: it carries a water-loving (hydrophilic) head and an oil-loving (hydrophobic) tail. Thanks to this dual nature it lowers the surface tension of water, wets surfaces, and traps oil and soil particles inside spherical clusters called micelles so they can be rinsed away.

Surfactants fall into four classes based on the charge of their head group:

• Anionic: Negatively charged, rich in foam and economical. SLES, SLS and LABSA are the most common examples.
• Nonionic: Uncharged, low foaming, holds performance in hard water and excels at grease removal.
• Cationic: Positively charged; used less for cleaning and more for softening and disinfection.
• Amphoteric: Changes behaviour with pH; mild to skin and balances foam.

In practice a single surfactant is rarely enough. Most detergents use an anionic + nonionic blend: the anionic component delivers foam and fast soil removal, while the nonionic component maintains performance in hard water and dissolves oily soil. In products that contact skin, such as dishwashing liquids and shampoos, an amphoteric component (e.g. cocamidopropyl betaine) is added to both enrich foam and reduce irritation.

The most widely used anionic representative, SLES (Sodium Laureth Sulfate, CAS 9004-82-4), is the primary foaming agent of shampoos, shower gels and dishwashing liquids thanks to its rich foam and strong grease cutting. For technical details, see our Sodium Laureth Sulfate (SLES) product page.

Builders: The Role of STPP and Soda Ash

No matter how good a surfactant is, it loses a large part of its power in hard water. The cause is the dissolved calcium (Ca²⁺) and magnesium (Mg²⁺) ions in water; these ions attach to surfactant molecules, precipitate them and render them ineffective. Builders solve exactly this problem: by "softening" the water they free the surfactant to spend its full power on cleaning.

Builders do three jobs at once:

• Binding hardness ions: They capture Ca and Mg ions to release the surfactant.
• Buffering pH: They hold the wash water in the mildly alkaline range that favours grease saponification.
• Soil dispersion: They prevent loosened soil from redepositing onto the surface.

Sodium Tripolyphosphate (STPP)

STPP is the most powerful and versatile builder of classic detergents. It binds hardness ions through sequestration, buffers pH, disperses soil and improves free-flow in powder detergents. Because it does the work of several additives on its own, it is known as a "multifunctional builder."

Parameter	Value / Description
Chemical name	Sodium tripolyphosphate (Na₅P₃O₁₀)
CAS No	7758-29-4
Appearance	White, free-flowing powder or granule
Solubility	Soluble in water; aqueous solution is alkaline
Main function	Sequestration, pH buffering, soil dispersion

Although phosphates are restricted in household laundry detergents in many countries because of environmental concerns (eutrophication in surface waters), STPP is still widely used in industrial cleaning, ceramics, food-processing aids and export-oriented formulas. For details, see our Sodium Tripolyphosphate (STPP) page.

Soda Ash (Sodium Carbonate)

Soda ash (Na₂CO₃, CAS 497-19-8) is an economical raw material that works as both a builder and an alkali. It softens water mildly, raises pH to help saponify grease, and serves as a filler/carrier in powder detergents. Because it is phosphate-free, it replaces part of the STPP in eco-oriented formulas, usually alongside zeolite and citrate.

Alkalis: The Power of pH in Cleaning

Oil and grease are far easier to clean in an alkaline (basic) medium, because high pH converts fatty acids into water-soluble soaps (saponification) and swells and dissolves protein-based soils. This is why industrial degreasers and oven/CIP cleaners are high-pH formulas.

The main alkaline raw materials:

• Caustic soda (Sodium hydroxide, NaOH, CAS 1310-73-2): The strongest alkali. It is the core of industrial degreasers that dissolve heavy oil and carbon deposits. It is corrosive and must be handled with care.
• Soda ash (Na₂CO₃): A medium-strength, safer and more economical alkali source.
• Sodium metasilicate: Provides alkalinity while also protecting metal surfaces; common in machine dishwashing detergents.

Safety note: Strong alkalis can cause severe burns to skin and eyes. They must never be casually mixed with acids, appropriate personal protective equipment must be worn, and the H/P statements in the product's current MSDS must be the reference.

Choosing pH is not always a matter of "the higher the better." Aluminium, wood, painted surfaces and some fabrics are damaged by high pH, which is why delicate surface cleaners are formulated in the neutral or mildly alkaline range.

Chelators: EDTA and Metal-Ion Control

Chelating agents (or sequestrants) are molecules that wrap around metal ions like a claw and form stable, water-soluble complexes. The word "chelate" comes from the Greek chele, meaning "claw"; the molecule grips the metal ion at several points, which explains the name.

The jobs of a chelator in a detergent:

• Neutralising water hardness: It binds Ca and Mg ions to support the builder.
• Colour and odour protection: Trace metals such as iron (Fe) and copper (Cu) accelerate the oxidation of fragrances and dyes; the chelator binds these metals to extend shelf life.
• Bleach stabilisation: It prevents oxygen bleaches such as perborate/percarbonate from decomposing prematurely in the presence of metal ions.
• Stain prevention: It reduces metal-derived rust and limescale staining.

EDTA

EDTA (ethylenediaminetetraacetic acid and its sodium salts) is one of the strongest and most widely used chelators. It binds a large number of metal ions with high stability across a wide pH range.

Parameter	Value / Description
Chemical name	Ethylenediaminetetraacetic acid (and Na salts)
CAS No	60-00-4 (acid), 64-02-8 (tetrasodium salt)
Appearance	White powder (acid) or clear solution (Na salt)
Main function	Metal-ion chelation, water softening, product stabilisation
Use level	Usually a low-percentage adjunct (depending on the formula)

Besides EDTA, sodium citrate (eco-friendly, readily biodegradable) and phosphonates (stable at high temperature and with bleaches) are also common chelators. As expectations for environmental biodegradability rise, alternatives such as citrate and GLDA may be preferred. For supply, see our EDTA product page.

Foam Control: To Boost or to Suppress?

Consumers perceive foam as a sign of cleaning, yet technically foam is not directly proportional to washing power. A good formulator manages foam according to the product's use scenario.

Where foam is wanted

In shampoos, shower gels, liquid hand soaps and hand-wash dishwashing liquids, foam matters for both the sensory experience and the perception of performance. Here foam is enriched with foam boosters such as amphoteric surfactants (CAPB), alkanolamides and betaines.

Where foam is unwanted

In dishwashers, washing machines and industrial CIP (clean-in-place) systems, excess foam damages pumps, hinders rinsing and causes overflow. These systems deliberately use low-foam nonionic surfactants and, where necessary, add antifoam additives.

The main types of antifoam:

• Silicone-based antifoams: Highly effective, work at low doses, and are stable across a wide temperature range.
• Mineral-oil-based antifoams: Economical; used especially in powder detergents and the paper industry.
• EO/PO block copolymers: Act as both a low-foam wetting agent and a foam suppressant.

Managing foam correctly often begins with choosing the right nonionic surfactant; an antifoam is only the fine adjustment needed after that.

Fragrances and Other Adjuncts

The chemical "skeleton" of a cleaning product is made of surfactants, builders and alkalis; yet the first bond a consumer forms with a product is often its scent. Fragrance (perfume) is not a technical component of the formulation, but it is critical for marketing and brand perception.

Points to watch when choosing a fragrance:

• Chemical stability: In media containing high alkalinity or bleach, some scent notes break down; durable fragrances suited to the formula must be selected.
• Solubility: A solubiliser (usually a nonionic surfactant) may be needed to keep the fragrance from clouding clear liquid systems.
• Regulation and allergens: Some fragrance components contain allergens requiring label declaration, which matters under regulations such as the EU rules and KKDİK.

Other adjuncts add further functions to the formula:

• Enzymes: Proteases, amylases and lipases break down protein, starch and oil stains at low temperatures.
• Optical brighteners: Shift reflected light toward blue to give a "whiter" appearance.
• Bleaches: Oxygen sources such as sodium percarbonate/perborate oxidise coloured stains.
• Colourants and preservatives: Provide visual identity and microbiological stability.

To see the full range of raw materials, browse our product catalogue.

Storage, Safety and Regulation

Detergent raw materials are chemicals that can be handled safely under the right conditions; however, each group has its own precautions.

• Hygroscopicity: Powders such as STPP and soda ash draw in moisture and can cake; they should be kept in sealed containers in a dry, cool place.
• Corrosivity: Caustic soda and strong alkalis are corrosive; suitable gloves, goggles and ventilation are essential.
• Incompatibilities: Do not casually mix acids with alkalis, or anionic surfactants with cationics; precipitation and gas release can occur.
• Regulation: Cleaning chemicals are assessed under regulations such as KKDİK in Türkiye and REACH in Europe; additional labelling/restriction rules apply for phosphates and certain fragrance allergens.

Yüksek Kimya shares MSDS and COA for the detergent raw materials it supplies, ships products in compliance with ADR rules, and offers the convenience of phone ordering. Our ISO 9001, 14001, 45001 and GHP certificates are concrete evidence of our quality and safety standards.

Conclusion

A good cleaning product is the result not of one miracle ingredient but of surfactants, builders, alkalis, chelators, foam-control additives and fragrances working in harmony. Each group solves a specific problem, and well-chosen, high-quality raw materials directly determine the performance of the finished product. From our Bursa Kestel headquarters, Yüksek Kimya supplies these raw materials to the detergent, cleaning, cosmetics and industrial sectors with technical support and complete documentation.

To identify the detergent raw material that fits your formula, request a sample or get a price quote, reach us through our contact page or call our formulation team at +90 224 326 27 50.