Aqueous liquid sulphato-ethylsulphonyl reactive dye composition containing small amount of buffer for storage stability at high and low temperatures

摘要

An aqueous liquid composition comprising at least one dye represented by the following formula in a free acid form, D-(SO2CH2CH2OSO3H)n wherein D is an organic dye residue having 1 to 3 sulfo groups, and n is 1 or 2, in an amount of 5 to 50% by weight, a buffer in an amount of not less than 0.1% by weight but less than 1% by weight, and a substance inert to the above dye in an amount of 0 to 10% by weight, the balance being water, and a pH value of the aqueous liquid composition ranging from 2.5 to 5.5, whcih can be stored for a long period of time even at low and high temperatures without physical and chemical changes.