Laundry — Process Challenge

洗浄助剤・キレート剤 硬水対応

硬水ではCa2+/Mg2+が陰イオン界面活性剤を失活させ(石灰石鹸沈殿)、洗浄力を消耗。設計には水質軟化とアルカリ性維持のための助剤・キレート剤選定が求められます
Updated Jun 2026
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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
アミン・アミド類
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
融点:300 °C (decomposes)   密度:6.9 lb/gal /Apparent density/   Solubility: Slightly soluble in ethanol
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Sodium Tripolyphosphate (STPP)
CAS 7758-29-4
酸・塩類
キレート化 / 金属イオン封鎖
Classic detergent builder: sequesters hardness ions and provides buffering/anti-redeposition, the historical workhorse for hard-water laundry powders
融点:622 °C   密度:2.52 g/cm3   Solubility: Freely soluble in water. Insoluble in ethanol
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Sodium Carbonate (Soda Ash)
CAS 497-19-8
酸・塩類
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
融点:856 °C   沸点:Decomposes on heating by CO2 loss   密度:2.54 g/cu cm
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Citric Acid (Anhydrous, FCC Food Grade)
CAS 77-92-9
酸・塩類
Biodegradable acid descaler and chelating agent
Biodegradable chelant that binds Ca2+/Mg2+; preferred where phosphate/EDTA are restricted
融点:153 °C (anhydrous)   沸点:Decomposes   密度:1.54 at 20 °C
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Sodium C14-16 Olefin Sulfonate
CAS 68439-57-6
界面活性剤
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
特殊添加剤
キレート化 / 金属イオン封鎖
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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