ISSUE+ABOUT+RHODAMINE+B

Rhodamine B is a synthetic dye used in textile and paper industries. Rhodamine B-shaped purplish red crystal powder and in solution will glow bright red. Rhodamine B dye banned from use as food. Rhodamin usually found in children's snacks, shrimp paste, and crackers are colored red. The solubility in water is ~ 50 g / 1L. However, the solubility in acetic acid solution (30 %v/v) Is ~ 400 g / 1L. Chlorinated tap water decomposes rhodamine B. Rhodamine B solutions adsorb to plastics and Should Be kept in glass. IUPAC name : [9 - (2-carboxyphenyl)-6-diethylamino-3-xanthenylidene]-diethylammonium chloride Trivial Name : Tetra Ethyl, Rheonine B, D & C Red No.. 19, CI Basic Violet 10, CI No. 45 179.

There are the physical properties of Rhodamine B :

· Melting point : 210-211 °C · Density : 0.79 g/mL at 20 °C · Flash Point : 12 °C · Storage temp : Store at RT. · Colour Index : 45170 · Water Solubility: SOLUBLE

Typical characteristics of food containing Rhodamin B: · Color red light, when the food product in the form of solution / a drink and the red color will glow. · In managing resistant to heating (boiled / fried color does not fade). · Many provide color dots for not homogeneous (eg, crackers, ice).