Benzene, 1,1'-oxybis-, tetrapropylene derivs., sulfonated, sodium salts
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Characteristics    excellent emulsifying, dispersing, cleansing, wetting abilities. Certain tolerance to inorganic electrolyte, oxidants. In the emulsion polymerization, can replace alkylphenol ethoxylates and sodium dodecyl sulfate.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, tetrapropylene diphenyl ether and fuming sulfuric acid or sulfur trioxide react through reactor, then sodium hydroxide or sodium carbonate neutralizes, finally obtain product.
Refer to: US patent 8,921,588 Process for preparing sulfates and/or sulfonates in a micro-reaction system.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Liquid
Actives, %, ≥
40.0 - 70.0
pH (25°C, 1%)
7.0 - 10.5
Test Methods
(1), Actives
 
(2), pH
GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method
ISO 4316 Surface active agents -- Determination of pH of aqueous solutions -- Potentiometric method
2. Hazardous substances indexes
Item
Hazardous substances indexes
Liquid
Solid
Heavy metals (as Pb), mg/Kg, ≤
20
20
As, mg/Kg, ≤
3
3
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)