... , premenstrual syndrome, colitis, and diabetes. Appearance Greyish-yellow or light yellow hygroscopic powder. SolubilityPractically insoluble in water, soluble in dimethyl sulphoxide, practically ... , premenstrual syndrome, colitis, and diabetes. Appearance Greyish-yellow or light yellow hygroscopic powder. SolubilityPractically insoluble in water, soluble in dimethyl sulphoxide, practically ...