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Cas 81-60-7/ 1,4,5,8-Tetrahydroxyanthraquinone (also known as 1,4,5,8-tetrahydroxy-9,10-anthraquinone, THPA) is an anthraquinone derivative with the molecular formula C₁₄H₈O₆ and a molecular weight of 272.21. It appears as bronze-colored needle-like crystals or dark red crystals. The molecule contains four hydroxyl groups and an anthraquinone core, exhibiting good electrochemical and reactive properties. It serves as an important dye intermediate, pharmaceutical intermediate, and precursor for electronic materials, and is widely used in the dye, pharmaceutical, and new energy sectors.
| Item | Specification |
| Melting Point | 298–300°C (decomposition) |
| Boiling point | 554.8 ± 45.0°C at 760 mmHg |
| Density | 1.8 ± 0.1 g/cm³ |
| Flash point | 303.4°C |
| Vapor pressure | 6.43E-13 mmHg at 25°C |
| Refractive index | 1.780 (Predicted value) |
| PKa | 6.45 ± 0.20 |
| Solubility | Sparingly soluble in water; readily soluble in organic solvents such as ethanol, acetone, and chloroform; turns red when dissolved in alkaline solutions. |
Dye Synthesis: Serves as a core intermediate for anthraquinone dyes, used in the preparation of acid, disperse, and solvent-based dyes for coloring fabrics, inks, and plastics.
Pharmaceutical Raw Materials: A key intermediate in the synthesis of anticancer drugs; also serves as a reference standard for pharmaceutical testing.
New Energy Materials: 1,4,5,8-Tetrahydroxyanthraquinone is used in the preparation of battery electrodes and energy storage electrolytes; can also be formulated into organic optoelectronic functional materials.
Fine Chemicals: 1,4,5,8-Tetrahydroxyanthraquinone is used as a colorimetric reagent for metal ion analysis; also functions as a redox catalyst in organic synthesis.
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