1,4-benzoquinone
Description
1,4-Benzoquinone (CAS 106-51-4), also known as quinone or p-BQ, is an oxidizing intermediate used across chemical synthesis, dye manufacturing, and surface treatment processes.
It functions primarily as a catalyst, oxidant, and chemical building block in industrial production. In pharmaceutical manufacturing, p-BQ serves as a key intermediate in the synthesis of active compounds.
This includes antifungal and antimalarial agents. Dye and pigment producers use it as a precursor for hydroquinone-based colorants and as an oxidant in coupling reactions for printing inks and packaging colorants.
In rubber and polymer processing, it acts as a polymerization inhibitor and crosslinking agent, helping control reaction rates during production. This ensures stability and consistency in the final product.
Personal care formulators incorporate quinone derivatives as intermediates in hair dye chemistry, where controlled oxidation is critical to color development. It is essential for achieving specific shades.
1,4-Benzoquinone is supplied as a yellow crystalline solid, typically in powder or flake form. Technical grade is the most common commercial specification for industrial applications.
Higher-purity grades are available to meet pharmaceutical synthesis requirements. It is packaged in fiber drums or sealed containers due to its sensitivity to moisture and light during storage.
Proper handling is required during transit to maintain the integrity of the material. Our supply chain ensures that all chemical building blocks meet rigorous industrial safety protocols.
Physical Properties
| Melting Point | 115.7 °C |
| Boiling Point | 180 °C |
| Density | 1.318 g/cm³ @ Temp: 20 °C |
| Flash Point | 38°C |
| Appearance | Quinone is a yellow, crystalline material or large yellow, monoclinic prisms. Pungent, irritating odor. |
| Color | Yellow to green |
| Odor | irritant odor |
| Form | Powder |
| Water Solubility | 10 g/L (25 ºC) |
| Vapor Pressure | 0.1 mm Hg ( 25 °C) |
| Refractive Index | n20/D 1.453 |
| pH | 4 (1g/l, H2O, 20℃) |
| Log P | 0.1-0.3 at 23℃ and pH4.8-5.3 |
Safety & Handling (Learn More)
Trade & Regulatory
| HS Code | 29146900 |
| UN Number | 2587 |
| ADR Class | 6.1 |
| Packing Group | II |
| Storage Class | 4.1B - Flammable solid hazardous materials |
| WGK (Germany) | 3 |
Documentation
Other Names
Quinone|Para-Quinone|para-benzoquinone|p-quinone|p-BQ|Eldoquin|Cyclohexadiene-1,4-dione|Benzoquinone [UN2587]
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