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Acid Yellow 23
Acid Yellow 23 / CAS : 1934-21-0
| Appearance | Orange yellow uniform powder, 0.1% aqueous solution is yellow and odorless. Soluble in water, glycerol and propylene glycol, slightly soluble in ethanol, insoluble in oil, good heat resistance, acid resistance, light resistance and salt resistance, stable to citric acid and tartaric acid, but poor oxidation resistance. It turns red in case of alkali and fades in reduction. Lemon Yellow Lake is yellow fine powder, odorless. Slowly dissolve in aqueous solution containing acid or alkali, insoluble in water and organic solvents. Heat resistance and light resistance are stronger than lemon yellow. | UN | 0.0 |
| HS | 32129000 | DG Class | 0.0 |
| Synonyms | Yellow 5; Tartrazine; Acid Yellow 23 (Tartrazine); Tartrazin; Fd And C Yellow No. 5; Fd & C Yellow 5; L-Gelb2; Filter Yellow; C.I. Food Yellow 4; Y-4; 3-Carboxy-5-Hydroxy-1-Para-Sulfophenyl-4-Para-Sulfophenylazopyrazole Trisodium Salt; 1310Yellow; Food Yellow No. 4; C.I.640; Tartazine; Tartarazine; Tartrazine (E102); E102; Tartrazine O; Wool Yellow; 4,5-Dihydro-5-Oxo-1-(4-Sulfophenyl)-4-[(4-Sulfophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid, Trisodium Salt; Dihydro-5-Oxo-1-(4-Sulfophenyl)-4-((4-Sulfophenyl)Azo)-1H-Pyrazole-3-Carboxylic Acid, Trisodium Salt; Pyrazole-3-Carboxylic Acid, 4,5-Dihydro-5-Oxo-1-(4-Sulfophenyl)-4-((4-Sulfophenyl)Azo)-, Trisodium Salt | ||
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Properties
Summary
Formula
C16H9N4Na3O9S2
Molecular Mass
491.408
Exact Mass
490.99400
PSA
220.19000
Logp
2.78190
IUPAC
trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazole-3-carboxylate
SMILES
C1=CC(=CC=C1N=NC2=C(NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)[O-])C(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+]
Attribute classification
Matter Classification
organic
Category
Cosmetics > Cosmetic Raw Materials
Food(Feed) Additives > Colorant
Dyestuffs and Pigments > Acid Dyes
Food(Feed) Additives > Colorant
Dyestuffs and Pigments > Acid Dyes
Chemical and Physical Properties
Melting Point
300ºC
Density
1.93 g/cm3 (20ºC)
Appearance
Orange yellow uniform powder, 0.1% aqueous solution is yellow and odorless. Soluble in water, glycerol and propylene glycol, slightly soluble in ethanol, insoluble in oil, good heat resistance, acid resistance, light resistance and salt resistance, stable to citric acid and tartaric acid, but poor oxidation resistance. It turns red in case of alkali and fades in reduction. Lemon Yellow Lake is yellow fine powder, odorless. Slowly dissolve in aqueous solution containing acid or alkali, insoluble in water and organic solvents. Heat resistance and light resistance are stronger than lemon yellow.
Export information
HS Code
32129000
Export Rebate
0%
UN No.
0.0
DG-Class
0.0
Risk Code
R42/43
Safety Label
Xn
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