ChemicalBook CAS DataBase List Disperse Red 9

Disperse Red 9 synthesis

12synthesis methods

Product Name:Disperse Red 9
CAS Number:82-38-2
Molecular formula:C15H11NO2
Molecular Weight:237.25

1-Chloroanthraquinone?or 9,10-Dioxo-9,10-dihydroanthracene-1-sulfonic acid?in pressure and in the presence of antioxidants with Methanamine for processing.

1643-19-2 Synthesis

1643-19-2
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$12.00/10g

82-45-1 Synthesis

82-45-1
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$9.00/25g

77-78-1
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$22.00/25g

82-38-2
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$9.00/25g

Yield:82-38-2 99.5%

Reaction Conditions:

with potassium hydroxide;acetic acid in water;nitrobenzene;

Steps:

1 EXAMPLE 1

EXAMPLE 1 A mixture of 1-aminoanthraquinone (purity 99.6%, 22.4 g), nitrobenzene (224 g), 96% potassium hydroxide (11.7 g), tetra-n-butyl ammonium bromide (1.7 g) and dimethylsulfuric acid (25 g) was stirred, while being maintained at 30° C. for 24 hours. Then, after water (150 g) was added, the solution was stirred for one hour while being maintained at 50° C. The aqueous phase had pH of 10 or higher. After acetic acid (0.5 g) was added for neutralization until pH of the aqueous phase was 7, nitrobenzene was recovered. The solution was cooled down to 50° C., and filtered. The solid material was washed and dried, to obtain 1-methylaminoanthraquinone (23.7 g, purity: 99.5%, yield 99.5%).

References:

US5017713,1991,A