1,4-benzoquinone
CAS 106-51-4
EC 203-405-2
Formula C6H4O2
MW 108.09 g/mol
Flavors & Fragrances Personal Care & CosmeticsFood & NutritionPrinting & PackagingPharmaceuticals & Healthcare Flavoring & AcidulantCatalysisSurface Modification & Wetting
Description
1,4-Benzoquinone (CAS 106-51-4, EC 203-405-2), also known as quinone, p-quinone, or chinone, is an organic oxidant belonging to the quinone family, with molecular formula C6H4O2. It carries no E-code designation and is classified under HS code 29146900 within the pigments and colorants category.
In pharmaceutical synthesis, benzoquinone acts as a selective oxidation catalyst, accepting electrons to drive redox reactions in active ingredient production. In personal care formulations, it functions as a skin-conditioning agent by participating in melanin biosynthesis pathways. The food and printing industries also employ it as a colorant and process chemical where controlled oxidation is required.
Benzoquinone is supplied as a technical-grade crystalline powder compliant with REACH registration requirements. Procurement teams should confirm purity specifications against intended application, as pharmaceutical use may require additional documentation. Standard packaging formats for European B2B supply typically include fiber drums and sealed polyethylene-lined containers to contain vapor emissions.
In pharmaceutical synthesis, benzoquinone acts as a selective oxidation catalyst, accepting electrons to drive redox reactions in active ingredient production. In personal care formulations, it functions as a skin-conditioning agent by participating in melanin biosynthesis pathways. The food and printing industries also employ it as a colorant and process chemical where controlled oxidation is required.
Benzoquinone is supplied as a technical-grade crystalline powder compliant with REACH registration requirements. Procurement teams should confirm purity specifications against intended application, as pharmaceutical use may require additional documentation. Standard packaging formats for European B2B supply typically include fiber drums and sealed polyethylene-lined containers to contain vapor emissions.
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
H
H301H315H317H319H331H335H341H370H371H400H410H301+H331
P
P203P260P261P264P270P271P272P273P280P316P318P319P321P330P391P405P501P264+P265P301+P316P302+P352P304+P340P308+P316P332+P317P333+P317P337+P317P362+P364P403+P233P305+P351+P338
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 |
Other Names
Cyclohexa-2,5-Diene-1,4-Dionep-BQChinonPBQ 2ChinoneQuinonep-Quinone
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Raw Materials
Derivatives
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