Physical and chemical properties:
Yellow needle-like crystals, flammable and low-toxic. Slightly soluble in ethanol and acetone, insoluble in water, soluble in concentrated sulfuric acid, easier to dissolve in hot benzene, toluene, nitrobenzene and aniline, when dissolved in hot lye, it can be reduced to pairs Anthradiol, a red solution, is oxidized into yellow anthraquinone powder by adding hydrogen peroxide. The density is 1.438 (20/4°C), the melting point is 286°C, the boiling point is 379-381°C, and the flash point is 185°C (closed). It can sublime when the temperature reaches 250°C.
Appearance: yellow or light gray crystalline powder
Melting point of dry product: ≥280℃
Anthraquinone mass fraction ≥98.0%
Heating weight loss ≤0.5%