4-Methoxyphenol
CAS 150-76-5
EC 205-769-8
Formula C7H8O2
MW 124.14 g/mol
Pharmaceutical Intermediates Plastics & PolymersPersonal Care & CosmeticsPharmaceuticals & HealthcareCoatings, Adhesives, Sealants & ElastomersPrinting & Packaging Antioxidant & StabilizerPolymerization Initiation
Description
4-Methoxyphenol, commonly known as MEHQ or monomethyl ether hydroquinone, is an organic compound registered under CAS 150-76-5 and EC 205-769-8. It is also referenced by the synonyms HQMME and mequinol across pharmaceutical and industrial documentation.
In monomer stabilization, MEHQ functions as a radical scavenger, intercepting free radicals to prevent premature polymerization during storage and transport of acrylates and styrene. In pharmaceutical manufacturing, it serves as a key intermediate in the synthesis of topical depigmentation actives. Coatings and adhesive formulators also rely on it to extend shelf life of reactive resin systems.
This material is supplied in pharmaceutical and technical grades, compliant with REACH registration requirements. It is available in solid form, typically packaged in fiber drums or bags suited for bulk procurement. Buyers should confirm grade-specific documentation, including CoA and SDS, prior to formulation use.
In monomer stabilization, MEHQ functions as a radical scavenger, intercepting free radicals to prevent premature polymerization during storage and transport of acrylates and styrene. In pharmaceutical manufacturing, it serves as a key intermediate in the synthesis of topical depigmentation actives. Coatings and adhesive formulators also rely on it to extend shelf life of reactive resin systems.
This material is supplied in pharmaceutical and technical grades, compliant with REACH registration requirements. It is available in solid form, typically packaged in fiber drums or bags suited for bulk procurement. Buyers should confirm grade-specific documentation, including CoA and SDS, prior to formulation use.
Physical Properties
| Melting Point | 57 °C |
| Boiling Point | 243 °C @ Press: 760 Torr |
| Density | 1.55 g/cm³ @ Temp: 20 °C |
| Flash Point | >230 °F |
| Appearance | 4-Methoxyphenol is a colorless to white, waxy solid with an odor of caramel and phenol. A combustible solid. |
| Color | Clear colorless to pale yellow |
| Odor | at 1.00?%?in?dipropylene glycol. phenolic |
| Form | Liquid |
| Water Solubility | 40 g/L (25 ºC) |
| Vapor Pressure | <0.01 mm Hg ( 20 °C) |
| Refractive Index | 1.5286 (estimate) |
| pH | 5.1 (30g/l, H2O, 20℃) |
| Log P | 1.3 at 20℃ |
Trade & Regulatory
| HS Code | 29095090 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 1 |
Other Names
Hydroquinone Monomethyl EtherMEHQHQMMEMequinolHYDROXYANISOLEp-Methoxyphenol4-HYDROXYANISOLE
Related Products
Raw Materials
Need a chemical? Get a quote within 24 hours.