JPS6236517B

JPS6236517B

Bis-(2,4-dinitrophenyl)-methylpyridinium compounds useful as a pH indicator or for the detection of ammonia having the formula: wherein one of R1 and R2 is a bis-(2,4-dinitrophenyl)-methyl radical and the other is a lower alkyl radical; R2 can also be hydrogen atom or trifluoromethyl; R3 and R4 are...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: UERUNAA GYUUTORAIN, UORUFUGANGU UERUNAA, UARUTAA RITAASUDORUFU, ANZERUMU ROOTE
Format: Patent
Sprache:eng
Schlagworte:
ADHESIVES
CHEMISTRY
DYES
HETEROCYCLIC COMPOUNDS
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
LAKES
MEASURING
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC CHEMISTRY
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
PHYSICS
POLISHES
TESTING
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Beschreibung
Zusammenfassung:Bis-(2,4-dinitrophenyl)-methylpyridinium compounds useful as a pH indicator or for the detection of ammonia having the formula: wherein one of R1 and R2 is a bis-(2,4-dinitrophenyl)-methyl radical and the other is a lower alkyl radical; R2 can also be hydrogen atom or trifluoromethyl; R3 and R4 are hydrogen or, together with the carbon atoms to which they are attached, represent a benzene ring; and X(-) is an appropriate acid anion or said compounds are betaines.