Dystar Colours Distribution Gmbh

Michael Joerss

Clemens Grund

Gunter Görlitz

Bernd Hostasch

Aloysius Engel

Described are dyes of formula (I) where Ris hydrogen, alkyl, alkoxy, trifluoromethyl or halogen, M is hydrogen, an alkali metal cation or an optionally substituted ammonium cation, Rand Rare each independently hydrogen, alkyl or alkoxy, Ris alkyl or alkoxy, Rand Rare each independently moieties of the formula &#x2014;(CH)&#x2014;O&#x2014;CH, m is an integer from 3 to 6, and n is an integer from 0 to 8. These dyes are useful for dyeing and printing materials having polar groups. 

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Leverkusen, Germany

Michael Joerss