SoleChem

1,4-benzoquinone

CAS
106-51-4
EC
203-405-2
Mol. Weight
108.09 g/mol

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.

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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)

Danger GHS06 GHS09 GHS07 GHS08
Hazard Statements
H301 Toxic if swallowed
H315 Causes skin irritation
H317 May cause an allergic skin reaction
H319 Causes serious eye irritation
H331 Toxic if inhaled
H335 May cause respiratory irritation
H341 Suspected of causing genetic defects
H370 Causes damage to organs
H371 May cause damage to organs
H400 Very toxic to aquatic life
H410 Very toxic to aquatic life with long lasting effects
H301+H331 Toxic if swallowed or if inhaled
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P272 Contaminated work clothing should not be allowed out of the workplace.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P316 Get emergency medical help immediately.
P318 IF exposed or concerned, get medical advice.
P319 Get medical advice/attention if you feel unwell.
P321 Specific treatment (see … on this label).
P330 Rinse mouth.
P391 Collect spillage.
P405 Store locked up.
P501 Dispose of contents/container in accordance with local regulations.
P264+P265 Wash … thoroughly after handling.
P301+P316 Get emergency medical help immediately.
P302+P352 IF ON SKIN: Wash with plenty of water.
P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P308+P316 Get emergency medical help immediately.
P332+P317 Get emergency medical help.
P333+P317 Get emergency medical help.
P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P362+P364 Take off contaminated clothing and wash it before reuse.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

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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