Wholesale CAS NO.:129-09-9
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Wholesale CAS NO.:129-09-9

Wholesale CAS NO.:129-09-9 is Vat Yellow 2, also known as Vat Yellow GCN, which is a kind of vat dye, which can be widely used in the dyeing and printing of cotton and silk fabrics. Milestone Industrial Co. Ltd. is a manufacturer specializing in the production of vat dyes. Its advantageous products include vat yellow, vat orange, vat blue, and vat red. They have stable performance in application and are well received by users.

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Wholesale CAS NO.:129-09-9

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Wholesale CAS NO.:129-09-9 is Vat Yellow 2, also known as Vat Yellow GCN, which is a kind of vat dye, which can be widely used in the dyeing and printing of cotton and silk fabrics. Milestone Industrial Co. Ltd. is a manufacturer specializing in the production of vat dyes. Its advantageous products include vat yellow, vat orange, vat blue, and vat red. They have stable performance in application and are well received by users.


Wholesale CAS NO.:129-09-9 Vat Yellow 2 details:

Other names: Vat Yellow GCN, Vat Yellow 2

CAS NO.:129-09-9

EINECS: 204-931-5

Molecular formula: C28H14N2O2S2

Molecular weight: 474.55

Molecular structure diagram:




CAS NO.: 129-09-9 Vat Yellow 2 preparation process:


1) Production of CAS NO.: 129-09-9 Vat Yellow 2 Sulfonation process: Put in 400 kg of anthraquinone, 250 kg of sodium sulfate and 1200 kg of 105% fuming sulfuric acid, and use kaolin at 1200°C high temperature baking. 1.7 kg of catalyst for directional catalysis. In a 2500-3500L reaction pot, the reaction is heated to 130°C, kept for 4 hours, and then cooled to 40°C, put into the dilution pot, diluted with 2000 kg of water, and then added with ammonia to neutralize to pH 7; The product ratio of quinone 2,6-bissulfonic acid ammonium salt and anthraquinone 2,7-bissulfonic acid ammonium salt reaches 60wt%: 40wt%.

2) The process of making CAS NO.: 129-09-9 Vat Yellow 2 for ammoniating: including 350 kg of 2,6-bissulfonic acid ammonium salt, 200 kg of anti-dyeing salt S, 200 kg of liquid ammonia and 1800 kg of deionization Water is poured into the high-pressure reactor for reaction, heated to 170° C. for reaction, and kept for 30-35 hours; after the reaction, 2 Chemicalbook, 6-diaminoanthraquinone is produced.

3) Production of CAS NO.: 129-09-9 Vat Yellow 2 synthesis stage: including 70 kg 2,6-diaminoanthraquinone, 200 kg trichlorotoluene, 380 kg refined naphthalene (solvent), 0.1 kg chlorination Cuprous and 50 kilograms of sulfuric acid were put into a 650L reaction pot for reaction. The reaction was carried out at 210°C and kept warm for a total of 7 hours; then, hot filtration was performed when the reaction material was cooled down to 100°C to obtain crude reduced yellow GCN, containing naphthalene residue and undesirable The filtrate of the reacted trichlorotoluene is then distilled to recover naphthalene and trichlorotoluene under -0.3Mpa pressure.

4) The refining process of making CAS NO.: 129-09-9 Vat Yellow 2: Put the crude Vat Yellow GCN into sulfuric acid and heat it to 140°C for 3 hours for refining, then dilute, filter, and be beaten by adding sodium hypochlorite for oxidation. Finally, use acid-resistant and high-temperature resistant 1000-mesh filter paper and cotton filter cloth to make filter materials to filter to obtain.


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