cas 81-55-0, 1,8-Dihydroxy-4,5-dinitroanthraquinone

Leuco-1,4,5,8-tetrahydroxyanthraquinone was prepared from chrysazin by nitration and reduction with iron powder, followed by treatment with sodium hydrosulfite in alkaline solution. This method is suitable for scaling, and is significant and improved over literature methods.

Pure 4,5-dinitrochrysazin was prepared by selective nitration of chrysazin, followed by solvent extraction of impurities. This method is suitable for scaling without need of chromatography, and represents a significant improvement over literature methods.

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Chemwill Asia Co., Ltd.
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Henan Tianfu Chemical Co., Ltd.
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Leader Biochemical Group
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Hebei Nengqian Chemical Import and Export Co., LTD
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Hangzhou Sartort Biopharma Co., Ltd
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Shanghai Upbio Tech Co.,Ltd
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Baoji Guokang Healthchem co.,ltd
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Henan Wentao Chemical Product Co., Ltd.
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Hunan chemfish Pharmaceutical co.,Ltd
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81-55-0

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Chemical Properties

Appearance/Colour :brownish-gold solid

Melting Point: 225 °C (dec.)(lit.)

Boiling Point: 669.4 °C at 760 mmHg

Flash Point:280.9 °C

Density: 1.838 g/cm³

Solubility:Dichloromethane (Very Slightly, Heated, Sonicated), DMSO (Slightly)

Storage Temp.:-20°C Freezer

Vapor Pressure: 1.57E-18mmHg at 25°C

Refractive Index: 1.782

PKA: 3.45±0.20(Predicted)

PSA: 166.24000

LogP: 2.73600

Global suppliers and manufacturers of 81-55-0total 63 suppliers on LookChem

Article Database

81-55-0

Articles about 81-55-0Total 2 be found

More Articles about upstream products of 81-55-0

More Articles about downstream products of 81-55-0

Chemical Properties

Appearance/Colour :brownish-gold solid

Melting Point: 225 °C (dec.)(lit.)

Boiling Point: 669.4 °C at 760 mmHg

Flash Point:280.9 °C

Density: 1.838 g/cm3

Solubility:Dichloromethane (Very Slightly, Heated, Sonicated), DMSO (Slightly)

Storage Temp.:-20°C Freezer

Vapor Pressure: 1.57E-18mmHg at 25°C

Refractive Index: 1.782

PKA: 3.45±0.20(Predicted)

PSA: 166.24000

LogP: 2.73600

Global suppliers and manufacturers of 81-55-0total 63 suppliers on LookChem

Density: 1.838 g/cm³