Rhodamine B Usage and Production Method

                                Rhodamine B Usage and Production Method

Usage

1. This product is used for dyeing paper, acrylic, silk, leather, feathers, and can be used in food and some metal analysis reagents. Used as adsorption indicator and biological dye, etc.

2. Used for dyeing paper, paint, acrylic, and wood products. Used mainly for dyeing wax paper, typing paper, glossy paper, etc. in the papermaking industry; reacting with phosphotungstomolybdic acid to form lakes, which are used to make paints, drawings and other pigments;

3. Used for dyeing acrylic, hemp, silk and other fabrics, as well as straw and leather products.

4. Used for biochemical research. Used for photometric determination of gold, gallium, mercury, antimony (V), thallium (III), fluorescence determination of manganese, cobalt, etc., and colorimetric determination of cadmium. Redox indicator used to titrate precipitants of tin, antimony, niobium, and tantalum. Biological dye. Series of laser dyes.

Production method

The product is obtained by combining m-hydroxydiethylaniline with phthalic anhydride, then alkali melting with sodium hydroxide, then dissolving with sulfuric acid, crystallizing with hydrochloric acid, salting out, filtering and drying. Raw material consumption (kg/t) m-hydroxydiethylaniline 760 phthalic anhydride 600 sulfuric acid 590 hydrochloric acid (31% Chemicalbook) 390 sodium hydroxide (100%) 390 refined salt 120 Taiko oil 19.