FIELD: chemistry.
SUBSTANCE: invention relates to method of producing trisodium salt of chlorine e6. Method comprises treating tris-meglumine salt of chlorine e6 with 17.5 % hydrochloric acid solution at temperature selected from range of values of 10–25 °C, separating the precipitate by centrifugation and washing it with water, followed by treatment with 1 % aqueous sodium hydroxide solution until reaching the pH value with values from range of 9.2–9.4 and optical density of 220 units at wave length 654 nm, lyophilization.
EFFECT: disclosed invention provides high output and stable composition of end product.
1 cl, 3 ex
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