The present invention relates to carboxymethyl hydroxyalkyl ether of Cassia tora (CMHACT) and its use in textile printing. Polygalactomannans are polysaccharide that are found in the endosperm material of seeds from leguminous plants such as Cyamopsis tetragonoloba (guar gum), Cesalpinia spinosa (tara gum), Ceratonia siliqua (locust bean gum) and another important source is Cassia tora (collectively known as Cassia gum). The average ratio of p-D-mannopyranose to ct-D-galactopyranose units in the polygalactomanan contained in Cassia gum is at least 5:1. The carboxymethyl hydroxyalkyl ether of Cassia tora (CMHACT) has been synthesized in situ by reacting Cassia tora splits with sodium monochloroacetate (SMCA) and ethylene/propylene oxide (EO/PO) in the presence of sodium hydroxide (NaOH). This new material showed significant improves the properties compared to parent polysaccharide such as increased its solubility in cold water, stability and shear thinning behavior. The material thus developed was studied for its suitability as excellent thickeners for various dyes like reactive, metal complex etc. and printing on cotton, silk, prints by CMHACT are of higher color strength, good leveling and washing properties. Thus this new double derivative (CMHACT) used extensively as thickener in textile printing as a replacement for alginate, starches, cellulose, galactomannans and it derivatives.
