Sodium PEG cocamide sulfate
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(2), 1,4-dioxane generated during preparation: probable carcinogen. However, can be acceptable when concentration of 1,4-dioxane is less than 30ppm or less.
Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
PEG cocamide and sulfur trioxide react through reactor, then sodium hydroxide neutralizes, finally obtain product.
For further information, please 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
High-enriched type
Low-enriched type
Actives, %, ≥
60.0
25.0 - 30.0
pH (25°C, 1% solution)
6.5 - 9.5
6.5 - 9.5
1,4-Dioxane, ppm, ≤
30
30
Test Methods
(1), Actives
GB/T 5173 Surface active agents and detergents-Determination of anionic-active matter by direct two-phase titration procedure
ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure
(2), pH
GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method