Yellow 5

Tartrazine

Names
IUPAC name Trisodium 5-hydroxy-1-(4-sulfonatophenyl)-4-[(E)-(4-sulfonatophenyl)diazenyl]-1H-pyrazole-3-carboxylate
Other names FD&C Yellow 5
Identifiers
CAS Number	1934-21-0 Y
3D model (Jmol)	Interactive image
ChemSpider	10606981 Y
ECHA InfoCard	100.016.091
E number	E102 (colours)
PubChem	6321403
UNII	I753WB2F1M Y
InChI InChI=1S/C16H12N4O9S2.3Na/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;;;/h1-8,21H,(H,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b18-17+;;; Y Key: YXHBBEQKMVAJOH-GLCFPVLVSA-K Y InChI=1/C16H12N4O9S2.3Na/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;;;/h1-8,21H,(H,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b18-17+;;; Key: YXHBBEQKMVAJOH-KAGMCZNHBW
SMILES [Na+].[Na+].[Na+].[O-]S(=O)(=O)c1ccc(cc1)/N=N/c3c(nn(c2ccc(cc2)S([O-])(=O)=O)c3O)C([O-])=O
Properties
Chemical formula	C16H9N4Na3O9S2
Molar mass	534.36 g·mol−1
Hazards
NFPA 704	1 2 0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

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).

Tartrazine is a commonly used color all over the world, mainly for yellow, and can also be used with Brilliant Blue FCF (FD&C Blue 1, E133) or Green S (E142) to produce various green shades.

Many foods contain tartrazine in varying proportions, depending on the manufacturer or person preparing the food, although the recent trend is to avoid it or substitute a non-synthetic dyeing substance such as annatto, malt color, or betacarotene (see Sensitivities and intolerance, below).

When in food, tartrazine is typically labelled as "color", "tartrazine", or "E102", depending on the jurisdiction, and the applicable labeling laws (see Regulation below).

Products containing tartrazine commonly include processed commercial foods that have an artificial yellow or green color, or that consumers expect to be brown or creamy looking. It has been frequently used in the bright yellow coloring of imitation "lemon" filling in baked goods. The following is a list of foods that may contain tartrazine:

A number of personal care and cosmetics products may contain tartrazine, usually labelled as CI 19140 or FD&C Yellow 5, including:

Various types of medications include tartrazine to give a yellow, orange or green hue to a liquid, capsule, pill, lotion, or gel, primarily for easy identification. Types of pharmaceutical products that may contain tartrazine include vitamins, antacids, cold medications (including cough drops and throat lozenges), lotions and prescription drugs.