Quick Search
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is an important aromatic phenolic compound widely used as a polymerization inhibitor for acrylates, methacrylates, styrene, and other reactive monomers.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) functions as a powerful free-radical scavenger, preventing unwanted polymerization during storage, transport, or high-temperature processing.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is valued for its high efficiency at low concentrations, excellent color stability, and broad compatibility with industrial monomers and resins.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is also used as an antioxidant, chemical intermediate, cosmetic stabilizer, and reagent in pharmaceutical and specialty chemical synthesis.
CAS Number: 150-76-5
EC Number: 205-769-8
Molecular Formula: C7H8O2
Molecular Weight: 124.14 g/mol
Synonyms: 4-Methoxyphenol, Monomethyl Ether of Hydroquinone, MEHQ, p-Methoxyphenol, 4-Hydroxyanisole, p-Anisole Hydroquinone, Methyl Ether of Hydroquinone, Methacrylate Stabilizer MEHQ, Acrylate Inhibitor MEHQ, Phenolic Polymerization Inhibitor, 4-Methoxyphenol (Monomethyl Ether of Hydroquinone), p-Methoxyphenol, Para-Methoxyphenol, MEHQ, Hydroquinone Monomethyl Ether, Monomethyl Ether of Hydroquinone, p-Hydroxyanisole, 4-Hydroxyanisole, p-Methoxy Phenol, 4-Methoxy Phenol, p-Monomethyl Hydroquinone, Para-Monomethyl Hydroquinone, p-Methyl Ether Hydroquinone, 4-Methyl Ether Hydroquinone, Methoxy-Hydroquinone, Methoxyphenol p-Isomer, p-Methoxylated Phenol, p-Methoxy Aromatic Phenol, p-Hydroxy Anisole, Anisic Phenol (trade name), Anisidinic Phenol (trade name), Methoxybenzene-4-ol, 4-Methoxybenzene-1-ol, MEHQ Inhibitor, MEHQ Polymerization Inhibitor, MEHQ Acrylic Stabilizer, MEHQ Vinyl Monomer Inhibitor, MEHQ Styrene Inhibitor, MEHQ MMA Inhibitor, MEHQ Radical Scavenger, MEHQ Antioxidant, MEHQ UV Stabilizer Component, MEHQ Stabilizing Agent, MEHQ Phenolic Stabilizer, MEHQ Anti-Oxidative Agent, MEHQ Resin Stabilizer, MEHQ Free Radical Inhibitor, 4-Methoxyphenol Antioxidant
APPLICATIONS
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used as a polymerization inhibitor for acrylate monomers.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) protects MMA, EMA, HEMA, and related monomers from premature polymerization.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) stabilizes monomers during shipping and long-term storage.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in methacrylate resin systems.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) helps maintain optical clarity and color.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) improves thermal stability of reactive liquids.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in coatings and resin production.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) prevents oxidative degradation of stored resins.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) ensures consistent viscosity and quality.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is applied in adhesives and sealants.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) enhances shelf stability of reactive adhesives.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) protects polymers from radical-induced breakdown.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used as an antioxidant in cosmetic formulations.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) stabilizes oils and actives against oxidation.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) extends product shelf life.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is a key intermediate in pharmaceuticals.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) contributes phenolic functionality for drug precursor synthesis.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) participates in selective aromatic substitution reactions.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in fragrances and aroma chemicals.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) acts as a precursor to anisole-derived fragrance compounds.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) improves stability of aroma intermediates.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in dye, pigment, and UV absorber synthesis.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) supports chromophore formation.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) enhances photostability in polymeric applications.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is applied in agrochemical intermediate production.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) contributes to herbicide precursor molecules.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) stabilizes concentrated formulations.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used as a polymerization inhibitor.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) prevents premature polymerization of acrylic and methacrylic monomers.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) ensures safe storage of highly reactive monomer systems.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used as a stabilizer for styrene.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) prevents uncontrolled polymer buildup in styrene tanks.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) enhances transportation safety of vinyl aromatic monomers.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used as an antioxidant in industrial chemicals.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) protects reactive substances from oxidative degradation.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) extends shelf life of oxygen-sensitive materials.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in UV-curable resin systems.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) prevents premature curing under ambient light.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) stabilizes UV inks and coatings during storage.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in epoxy formulations.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) delays unwanted crosslinking reactions.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) improves resin pot life and storage stability.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in acrylic adhesive production.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) maintains viscosity stability in pressure-sensitive adhesives.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) prevents gelling during adhesive transport.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in photopolymer formulations.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) prevents spontaneous curing in 3D-printing resins.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) helps maintain resin clarity and stability.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used as a reagent in organic synthesis.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) serves as a precursor for aromatic ethers.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) participates in fine chemical and pharmaceutical synthesis.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in fragrance manufacturing.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) forms intermediates for floral and sweet aromatic compounds.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) contributes to synthesis of fragrance esters.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in rubber chemical stabilization.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) protects rubber intermediates from oxidative breakdown.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) improves shelf life of vulcanization promoters.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in pigment and dye stabilization.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) inhibits oxidation of organic pigments.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) improves color stability in printing inks.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in laboratory analytical chemistry.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) serves as a calibration standard for phenolic compounds.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in redox reaction studies.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is used in alkyd and acrylic coating stabilization.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) prevents gel formation in solventborne resins.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) supports storage stability of high-reactivity coatings.
DESCRIPTION
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) appears as a white to off-white crystalline solid with a faint phenolic odor.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is stable under recommended storage conditions.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) dissolves in ethanol, ether, and many organic solvents.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is a strong antioxidant and free-radical scavenger.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) protects reactive monomers from thermal and oxidative polymerization.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) performs effectively at low inhibitor concentrations.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) possesses high thermal and oxidative stability.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) maintains color integrity even after long storage.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) blends well with hydroquinone for synergistic inhibition.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) shows good compatibility with monomers, resins, and reactive additives.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) integrates easily into polymer systems.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) exhibits predictable behavior during processing.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is an aromatic phenolic compound used predominantly as a stabilizer and antioxidant.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is widely known as MEHQ or hydroquinone monomethyl ether.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is essential for preventing premature polymerization in monomers and resins.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) has the chemical formula C₇H₈O₂.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) has the CAS number 150-76-5.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) has the EC number 205-769-8.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) appears as a white to slightly beige crystalline solid.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) has a mild aromatic phenolic odor.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is soluble in alcohols, ethers, and alkaline solutions.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is a strong radical scavenger.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) absorbs UV radiation and prevents photochemical reactions.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) provides long-term stabilization for acrylic, styrenic, and vinyl systems.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) can cause skin irritation and requires proper PPE during handling.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) should be stored in cool, dry, light-protected environments.
4-Methoxyphenol (Monomethyl Ether of Hydroquinone) is a key industrial antioxidant widely used in resins, coatings, monomers, and specialty chemicals.
PROPERTIES
Chemical Formula: C7H8O2
Molecular Weight: 124.14 g/mol
Appearance: White/off-white crystals
Odor: Mild phenolic odor
Melting Point: 54–56°C
Boiling Point: ~243°C
Solubility: Soluble in ethanol, ether, acetone, and organic solvents
Reactivity: Strong radical scavenger
Stability: Stable when protected from light and heat
Flash Point: ~121°C
pH: Slightly acidic (phenolic)
FIRST AID
Inhalation:
Move to fresh air immediately.
Seek medical help if symptoms persist.
Skin Contact:
Wash with soap and water.
Remove contaminated clothing.
Seek medical attention if irritation develops.
Eye Contact:
Rinse thoroughly with clean water for several minutes.
Seek medical care for persistent irritation.
Ingestion:
Rinse mouth and drink water.
Do not induce vomiting.
Seek medical assistance if discomfort occurs.
Note to Physicians:
Treat symptomatically; phenolic irritation possible.
HANDLING AND STORAGE
Handling:
Wear protective gloves, goggles, and suitable clothing.
Avoid dust generation and inhalation.
Use in a well-ventilated environment.
Ventilation:
Local exhaust ventilation recommended for powder handling.
Avoidance:
Avoid strong oxidizing agents, strong acids, and strong bases.
Avoid light and heat exposure.
Spill Procedures:
Collect spilled material carefully to minimize dust.
Dispose of waste according to regulations.
Storage:
Store in a cool, dry, well-ventilated area.
Keep container tightly closed.
Protect from heat, air, and light to maintain inhibitor activity.
