General Name
Sulfated alkanolamide ethoxylates
Sulfated ethoxylated alkanolamides
Sulfated polyoxyethylene amides
Example:
Sodium salt of coco monoethanolamide + 2EO sulfate
Description
These products are prepared by sulphation of the ethoxylated monoalkanolamides. Complete sulphation gives very high viscosity products, so sulphation is only carried out to approx. 50-70% of the theoretical value. Products described as sulfated alkanolamide sulfates are therefore mixtures of sulfated ethoxylated alkanolamides and ethoxylated alkanolamides. Sulphation is normally carried out as if the starting materials were ethoxylated alcohols.
General properties
Solubility
Very soluble in water.
Chemical properties
Similar chemical stability to the ether sulphates (see Section 6.5.2).
Applications
The products are excellent detergents, particularly for dishwashing but are too costly and therefore not used. The only known application is in shampoos, and this is now probably being replaced by betaines.
Specification
| Anionic content | typically 15-20% |
| Unsulphated content | typically 10-15% |
| Viscosity | generally high and can be variable |
