FIELD: analytical chemistry, particularly, titrimetric analysis as acid-base indicators. SUBSTANCE: new 3,3'-substituted triphenyl methane dyes have formula I: 
wherein R1 is residue of 6-aminopenicillanic acid or anthranylic acid; R2 is chlorine or-hydrogen as acid-base indicators with PT of about pH of 7. New indicators having improved properties with pT of about pH of 7 are used to determine content of weak acids and bases and salts thereof with minimum titration error. EFFECT: improved properties of the dyes. 2 ex, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| 3,3'-SUBSTITUTED TRIPHENYLMETHANE DYES AS INDICATORS OR ANALYTIC REAGENTS FOR PHOTOMETRIC DETERMINATION OF PALLADDIUM OR CHLORINE | 0 |
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