Laundry — Process Challenge

Agentes Construtores e Quelantes para Detergentes em Água Dura

Em água dura, Ca2+/Mg2+ desativam o tensoativo aniônico (precipitação de sabão de cal) e consomem detergência; o projeto exige a seleção de agente construtor + quelante para abrandar a água e sustentar a alcalinidade
Updated Jun 2026
Abordagem de solução

RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Formulation Workflow
1
Application & Soil Assessment
Define the cleaning task, surfaces, soils, and water hardness, plus the safety and regulatory profile for the use environment.
2
Surfactant & Builder Selection
Match surfactants, builders, solvents, chelants, acids or alkalis, and preservatives to the soil, surface compatibility, and label claims.
3
Formulation & Use-Dilution Trial
Optimize the actives ratio and use dilution, checking foam, clarity, stability, and performance at the in-use concentration.
4
Performance & Stability Validation
Confirm cleaning efficacy, storage and freeze-thaw stability, and packaging compatibility before scale-up.
Recommended Chemistries (6)
Tetrasodium EDTA (EDTA Na4)
CAS 64-02-8
Aminas e Amidas
Broad-spectrum chelant binding Ca, Mg, Fe, Cu across wide pH range
Broad-spectrum aminopolycarboxylate that sequesters Ca2+/Mg2+/Fe so they cannot precipitate surfactant as lime soap, restoring detergency in hard water
Ponto de fusão:300 °C (decomposes)   Densidade:6.9 lb/gal /Apparent density/   Solubility: Slightly soluble in ethanol
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Sodium Tripolyphosphate (STPP)
CAS 7758-29-4
Ácidos e Sais
Quelação / Sequestro
Classic detergent builder: sequesters hardness ions and provides buffering/anti-redeposition, the historical workhorse for hard-water laundry powders
Ponto de fusão:622 °C   Densidade:2.52 g/cm3   Solubility: Freely soluble in water. Insoluble in ethanol
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Sodium Carbonate (Soda Ash)
CAS 497-19-8
Ácidos e Sais
Water softener and alkaline builder for powder and liquid laundry
Precipitates hardness as carbonate and supplies wash-liquor alkalinity, sparing the surfactant and raising soil saponification
Ponto de fusão:856 °C   Ponto de ebulição:Decomposes on heating by CO2 loss   Densidade:2.54 g/cu cm
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Citric Acid (Anhydrous, FCC Food Grade)
CAS 77-92-9
Ácidos e Sais
Biodegradable acid descaler and chelating agent
Biodegradable chelant that binds Ca2+/Mg2+; preferred where phosphate/EDTA are restricted
Ponto de fusão:153 °C (anhydrous)   Ponto de ebulição:Decomposes   Densidade:1.54 at 20 °C
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Sodium C14-16 Olefin Sulfonate
CAS 68439-57-6
Tensoativos
Mild anionic with better hard water tolerance than LAS
Alpha-olefin sulfonate tolerates hardness better than LAS, holding foam and cleaning where LAS would precipitate
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Sodium Hexametaphosphate (SHMP)
CAS 10124-56-8
Aditivos Especiais
Quelação / Sequestro
Threshold sequestrant/builder that ties up Ca2+/Mg2+ below stoichiometric dose and disperses hardness crystallites, a hard-water builder laundry formulators expect alongside STPP
Physical Description: Polymeric sodium metaphosphates: Clear hygrosco…   Solubility: CLEAR, HYGROSCOPIC GLASS; MP 628 °C; SOL IN WAT…   Decomposition: When heated to decomposition it emits toxic fum…
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