Mono- and dipotassium salts of azo compounds

US6281338A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Richard Sommer
• Frank Linke · Recklinghausen, DE
• Udo Herrmann · Dormagen, DE

Key dates

• Filing date: Sep 19, 2000
• Grant date: Aug 28, 2001
• Expiry date: Sep 19, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/919
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Mono- or dipotassium salts of azo compounds conforming to the formula (I) or one of its tautomeric structures ##STR1## where PA1 R and R' are independently OH, NH.sub.2, NH--CN, acylamino or arylamino and PA1 R.sup.1 and R.sup.1' are independently --OH or --NH.sub.2, and also their hydrates.