Synthesis
Obtained by esterification of ascorbic acid and sulfur trioxide, and neutralization by sodium hydroxide.
Quality Standards & Test Methods
1. Physical and chemical indexes
|
Item
|
Physical and chemical indexes
|
|
Solid
|
|
|
Actives, %, ≥
|
95.0
|
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. Hazardous substances indexes
|
Item
|
Hazardous substances indexes
|
|
Solid
|
|
|
Heavy metals (as Pb), mg/Kg, ≤
|
20
|
|
As, mg/Kg, ≤
|
3
|
Test Methods
(1), Heavy metals (as Pb)