Tartrazine

Tartrazine is a lemon yellow azo dye basically used as coloring agent in some of the food products like Desserts & sweets,Beverages,Snacks,Condiments & spreads .This is also used in cosmetic and personal care products like nail polish,face powder, mouth washes, perfumes etc.This is also used in medicines in-order to give a yellow, orange or green hue to a liquid, pill,capsule,gel or lotion, primarily for easy identification.

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Detailed Description for Tartrazine

Tartrazine is a synthetic acid dye containing both NN and CC chromophore groups (pyrazolone dye). It is a bright orange-yellow powder; soluble in water; used in coloring food, cosmetics and meications (FD&C Yellow No. 5). It is used in dying silk and wool. The chemical designation is 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[ (4-sulfophenyl) azo]-1H- Pyrazole- 3-carboxylic acid, trisodium salt. Acid dyes are water-soluble dyes employed mostly in the form of sodium salts of the sulfonic or carboxylic acids. They are anionic which attach strongly to cationic groups in the fibre directly. 

Tartrazine is a synthetic lemon yellow azo dye primarily used as a food coloring. It is also known as E number E102, C.I. 19140, FD&C Yellow 5, Acid Yellow 23, Food Yellow 4, and trisodium 1-(4-sulfonatophenyl)-4-(4-sulfonatophenylazo)-5-pyrazolone-3-carboxylate). 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

red powder

MELTING POINT >300 C (Decomposes at 250 C)
BOILING POINT

 

SPECIFIC GRAVITY

1.85 - 1.95

SOLUBILITY IN WATER

Soluble

PH  
VAPOR DENSITY

 

NFPA RATINGS Health: 2; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 

FLASH POINT

44 C

STABILITY Stable under ordinary conditions.

 

They can be applicable to all kind of natural fibres like wool, cotton and silk as well as to synthetics like polyesters, acrylic and rayon. But they are not substantive to cellulosic fibres. They are also used in paints, inks, plastics and leather.


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