Determination of Melting Point of Azo Dyes Based on 2,4-dihydroxybenzophenone by Open Capillary Method (CAT#: STEM-PPA-0070-YJL)

Introduction

In the field of azo dyes, phenols and naphthols play major roles for most of the commercial dyes. Most of the dyes are marketed in the form of azo disperse, azo-vat, azo-acid dyes, etc. All have the naphthols moiety bearing hydroxyl group(s) as an auxochrome group. One such compound is 2,4-dihydroxybenzophenone, bearing two hydroxy (as auxochrome) groups and a keto (chromophore) group. This compound has wide applications as a polymer additive. It is an excellent UV absorber, which prevents the photodegradation of most vinyl polymers. Azo dye formation based on this simple compound is an area with has not been developed, except in a few patents. The formation of dyes based on this compound may yield dyes with good hue properties. Hence, it was thought to be of interest to explore the field of azo dyes based on 2,4-dihydroxybenzophenone. In the field of azo dyes, phenols and naphthols play major roles for most of the commercial dyes. Most of the dyes are marketed in the form of azo disperse, azo-vat, azo-acid dyes, etc. All have the naphthols moiety bearing hydroxyl group(s) as an auxochrome group. One such compound is 2,4-dihydroxybenzophenone, bearing two hydroxy (as auxochrome) groups and a keto (chromophore) group. This compound has wide applications as a polymer additive. It is an excellent UV absorber, which prevents the photodegradation of most vinyl polymers. Azo dye formation based on this simple compound is an area with has not been developed, except in a few patents. The formation of dyes based on this compound may yield dyes with good hue properties. Hence, it was thought to be of interest to explore the field of azo dyes based on 2,4-dihydroxybenzophenone.