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Red Sun Dye Chem is Manufacturer and Exporter of Acid Yellow 19. Our Acid Yellow 19 dyes are available with great variety of shades. Acid Yellow 19 are used for coloring the various fabrics like wool, nylon, silk and many more protein fibers.

Acid Yellow 19 Specification :

The IUPAC name of Acid Yellow 19 is disodium 2-[[1-(2,5-dichloro-4-sulfonatophenyl)-3-methyl-5-oxo-4H-pyrazol-4-yl]diazenyl]naphthalene-1-sulfonate. With the CAS registry number 12220-64-3, it is also named as 2-((1-(2,5-Dichloro-4-sulfophenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl)azo)-1-naphthalenesulfonic acid, disodium salt. The product’s categories are Organics; Strong Acid Dyes; Dyes; Acid Dyes, and the other registry Yellow Acid Dyesnumbers are 66556-82-9; 70865-22-4. Besides, it is yellow powder, which is soluble in water. In addition, its molecular formula is C20H12Cl2N4Na2O7S2 and molecular weight is 601.34742.

The other characteristics of this product can be summarized as:

(1)H-Bond Donor: 0;
(2)H-Bond Acceptor: 10;
(3)Rotatable Bond Count: 3;
(4)Tautomer Count: 4;
(5)Exact Mass: 599.931985;
(6)MonoIsotopic Mass: 599.931985;
(7)Topological Polar Surface Area: 189;
(8)Heavy Atom Count: 37;
(9)Complexity: 1080;
(10)Water solubility: 50 g/L (90 °C);
(11)EINECS: 235-409-5.

Preparation and Uses of Acid Yellow 19:

please dizotize 2-Aminonaphthalene-1-sulfonic acid. And then put the resultant to couple with 1-(2′,5′-Dichloro-4′-sulfo-phenyl)-3-methyl-5-pyrazolone. You will obtain this chemical after salting out, filtration, drying and crushing. Moreover, this product is used for dyeing of silk and wool. It also can be used for direct printing of wool and silk fabrics.
People can use the following data to convert to the molecule structure.
(1)SMILES: [Na+].[Na+].[O-]S(=O)(=O)c3c4c(ccc3/N=N/C2\C(=N/N(c1c(Cl)cc(c(Cl)c1)S([O-])(=O)=O)C2=O)C)cccc4
(2)InChI: InChI=1/C20H14Cl2N4O7S2.2Na/c1-10-18(20(27)26(25-10)16-8-14(22)17(9-13(16)21)34(28,29)30)24-23-15-7-6-11-4-2-3-5-12(11)19(15)35(31,32)33;;/h2-9,18H,1H3,(H,28,29,30)(H,31,32,33);;/q;2*+1/p-2/b24-23+
(4)Std. InChI: InChI=1S/C20H14Cl2N4O7S2.2Na/c1-10-18(20(27)26(25-10)16-8-14(22)17(9-13(16)21)34(28,29)30)24-23-15-7-6-11-4-2-3-5-12(11)19(15)35(31,32)33;;/h2-9,18H,1H3,(H,28,29,30)(H,31,32,33);;/q;2*+1/p-2/b24-23+


Properties and Applications:

Yellow. Yellow powder. Soluble in water, 90 water solubility of 50 g/L. The dye in light of copper (dark colored light iron ion in the dark. This product is mainly used for the wool dyeing, also can be used for silk dyeing and wool and silk fabrics in direct printing, also can be used for leather color. Dye can be in pH 4 ~ 7 dyed bath dyeing, dyeing temperature of 70 ~ 90. Wool and silk dyeing in acetic acid, formic acid or sulfuric acid bath, add Sodium Sulfate help even dye.


Name: Acid Yellow 19
CAS: 12220-64-3
C.I. No.: C.I. 18967
Synonyms 1-Naphthalenesulfonicacid,2-[[1-(2,5-dichloro-4-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-,disodium salt (9CI);Acid Yellow 19;Acid Yellow 2GX;Aminyl Yellow E-GNL;BestAcid Yellow GL;C.I. Acid Yellow 19;Covalene Yellow RCP;Covanyl Yellow RCP;Daedo Acid Yellow C-GRL;Erio Fast Yellow G;Hispalon Yellow B-RGL;KenamideYellow GR;Mitsui Acid Fast Yellow GR;Nylosan Yellow E-GRL;Nylosan YellowE-GRL 160;Rifa Acid Fast Yellow E-GRL;Rifa Leather Yellow 3GL;SuminolLevelling Yellow NR;Triacid Fast Yellow GRL;Xylene Light Yellow R;2-((1-(2,5-Dichloro-4-sulfophenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl)azo)-1-naphthalenesulfonic acid, disodium salt.
Molecular Formula C20H12C12N4Na2O7S2
Molecular Weight 601.35
InChI InChI=1/C20H14Cl2N4O7S2.2Na/c1-10-18(20(27)26(25-10)16-8-14(22)17(9-13(16)21)34(28,29)30)24-23-15-7-6-11-4-2-3-5-12(11)19(15)35(31,32)33;;/h2-9,18H,1H3,(H,28,29,30)(H,31,32,33);;/q;2*+1/p-2/b24-23+
CAS Registry Number 2220-64-3
EINECS 235-409-5
Molecular Structure Acid Yellow 19

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