Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
Ciba Geigy AG
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Filing date
Publication date
Application filed by Ciba Geigy AGfiledCriticalCiba Geigy AG
Priority to ES0240700ApriorityCriticalpatent/ES240700A1/en
Publication of ES240700A1publicationCriticalpatent/ES240700A1/en
Process for the preparation of new azo dyes, characterized in that it is acylated in the amino group with an anhydride or with a halide of a beta-halogenopropionic acid, aminoazo dyes of the formula ** (See formula) ** where they represent R1 a radical of a diazo component, aromatic, at most bicyclic, optionally containing an azo group, the diazo component having at least as many sulfonic acid groups as six-membered aromatic rings, and R2 a benzene radical, linked in the 4 position with the amino group and in position 1 with the azo group. (Machine-translation by Google Translate, not legally binding)
ES0240700A1958-03-061958-03-06Procedure for the preparation of new azocolorants (Machine-translation by Google Translate, not legally binding)
ExpiredES240700A1
(en)