Chemical constitution: 
Amortize reactive alkali compound
Technical Index: 
Appearance: White powder
PH: 11.0-12.0
Solubility: Easily dissolved in water.
Characteristic & Benefits: 
1.It is a fixing alkali for reactive dyestuff, which can replace caustic soda, soda ash, trisodium phosphate.
2.Lower dosage, higher alkali ability, the dosage is just 1/8 or 1/10 of caustic soda. .
3.It can keep the dyeing bath stable; control the dyeing speed; ensure the dyeing process even and continuous.
4.Its viscosity is low, so it can avoid some dyeing spots.
5.It can use in many kinds of dyeing machine.
6.It is easily to wash off during the washing process.
Application 
221B is a fixing alkali for reactive dyeing process.
Dissolving/diluting: 
221B can be diluted with cold water.
Application 
Required amount:
Light shade color: 0.5 – 1.0 g/l
Middle shade color: 1.5 – 2.0 g/l
Deep shade color: 2.0 – 3.0 g/l
It must be destitute to solution before use; it must be added into dyeing bath in 2 or 3 times separately during the reactive fixing process.
Package & Storage: 
Craft Paper bag net 25kgs. 5kg per inner packing, total five in one bag. 221B is stable for 6 months when properly stored in closed containers at normal temperature.