FIELD: technological processes.
SUBSTANCE: invention relates to a method for purifying impurity derivatives of a diaminotriphenylmethane dye from a disulfo derivative for subsequent use as a contrast agent in the detection of regional lymphogenous metastasis of malignant tumors in tumors of different localization, as well as in food, drugs, cosmetics, etc. Method for purifying a disulfo derivative of a diaminotriphenylmethane dye is proposed, which consists in adsorption of a disulfo derivative of a diaminotriphenylmethane dye on a sorbent element in the form of a plate of polydimethylsiloxane. Result is a disulfo derivative of diaminotriphenylmethane dye with a purity of at least 99.8 % with simplification of the purification technology.
EFFECT: proposed method is simple in execution, easily scalable and characterized by a low cost price.
8 cl, 3 dwg, 2 ex
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