1-(2-THIENYL)-2-(4-NITRO-2-SULFOPHENYLAZO)-3- TRIFLUOROMETHYL-1,3-PROPANEDIONE AS ACID BASE INDICATOR FOR VISUAL DETERMINATION OF PH Russian patent published in 1997 - IPC

Abstract RU 2072999 C1

FIELD: organic chemistry, more particularly chemistry of azocompounds which are useful as acid-base indicators. SUBSTANCE: claimed invention describes novel chemical compound, namely 1-(2-thienyl)-2-(4-nitro-2-sulfophenylazo)-3- trifluoromethyl-1,3-propanedione (nisulphozane II). EFFECT: improved sensitivity of the reagent.

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RU 2 072 999 C1

Authors

Tepljakova A.Ju.

Kotov A.V.

Perevalov V.P.

Dates

1997-02-10—Published

1994-12-14—Filed