Name: Benzoquinone; 1,4-Benzoquinone; p-Benzoquinone; Cyclohexadiene-1,4-dione; p-Quinone
English Name: 1,4-Benzoquinone
Molecular Formula:  C₆H₄O₂
Molecular Weight: 108.09
CAS No.: 106-51-4
Structural Formula:

1. Product Description
p-Benzoquinone is yellow crystalline solid.
Combustible; autoignition temperature: 815 ℉.
Melting point: 116 ℃; Flash point: 38 ℃;
Relative density: 1.318 g/mL.
Soluble in ethanol, ether and alkalis, slightly soluble in water.
Sublimable. Its vapor is volatile with partial decomposition.
It has a pungent odor similar to chlorine.

2. Applications
In organic synthesis, 1,4-benzoquinone is used as a hydrogen acceptor (dehydrogenating agent) and oxidant.
It also acts as a dienophile in Diels–Alder reactions.
Derivatives of p-benzoquinone can react with acetic anhydride and sulfuric acid to produce derivatives of 1,2,4-benzenetriol triacetate.
First described by Thiele in 1898, this process is known as the Thiele reaction.

3. Packaging
Packed in iron drums, plastic drums or fiber drums with inner plastic bags.
Net weight: 25 kg per drum.

4. Specification
Net weight: 25 kg per drum.

5. Precautions
Store at room temperature.