P-METHOXYPHENOL

p-Methoxyphenol is an aromatic organic compound widely used as a stabilizer, polymerization inhibitor, antioxidant, and intermediate in chemical manufacturing.
p-Methoxyphenol helps prevent unwanted polymerization in monomers such as styrene, vinyl acetate, acrylates, and methacrylates.
p-Methoxyphenol is valued for its strong radical-scavenging ability, making it suitable for resins, coatings, adhesives, pharmaceuticals, and cosmetic formulations.
p-Methoxyphenol is also used as a key intermediate in fragrances, agrochemicals, UV absorbers, and fine chemical synthesis.

CAS Number: 150-76-5
EC Number: 205-769-8
Molecular Formula: C7H8O2
Molecular Weight: 124.14 g/mol

Synonyms: p-Methoxyphenol, 4-Methoxyphenol, MEHQ, Hydroquinone Monomethyl Ether, p-Anisole Hydroquinone, p-Hydroxyanisole, Monomethyl Ether of Hydroquinone, 4-Hydroxyanisole, p-Hydroquinol Methyl Ether, Acrylate Inhibitor MEHQ, Methacrylate Stabilizer MEHQ, p-Methoxyphenol, 4-Methoxyphenol, 4-Hydroxyanisole, Hydroquinone Monomethyl Ether, MEHQ, Monomethyl Ether of Hydroquinone, p-Anisic Alcohol (incorrect in strict chemistry, but widely used in trade), p-Anisolol, p-Anisyl Alcohol (trade synonym), p-Methoxyphenyl Alcohol (trade synonym), 4-Methoxyphenyl Alcohol (trade synonym), p-Methoxy Phenol, 4-Methoxy Phenol, p-Hydroxyanisole, Hydroxyanisole p-Isomer, p-Methoxyphenol Inhibitor Grade, Hydroquinone Monomethyl Ether Inhibitor, MEHQ Polymerization Inhibitor, MEHQ Acrylic Stabilizer, MEHQ Monomer Inhibitor, MEHQ Vinyl Monomer Stabilizer, MEHQ UV Stabilizer, MEHQ Antioxidant, MEHQ Radical Scavenger, p-Methoxyphenol Antioxidant, p-Methoxyphenol Polymer Stabilizer, p-Methoxyphenol Monomer Stabilizer, p-Methoxyphenol Acrylic Inhibitor, MEHQ MMA Inhibitor, MEHQ Styrene Inhibitor, MEHQ Butadiene Inhibitor, Technical Grade MEHQ, Industrial Grade MEHQ, High Purity MEHQ, Pure p-Methoxyphenol, Extra Pure p-Methoxyphenol, p-Methoxyphenol Crystals, p-Methoxyphenol Powder, p-Methoxyphenol Flakes, p-Methoxyphenol Solid Stabilizer, p-Methoxyphenol Fine Chemical, p-Methoxyphenol Specialty Chemical, p-Methoxyphenol Industrial Additive, p-Methoxyphenol Functional Additive, p-Methoxyphenol Chemical Inhibitor, MEHQ Phenolic Inhibitor, Phenolic Stabilizer MEHQ, Methoxyphenol p-Isomer, 4-Methoxy Phenolic Compound, p-Methoxyphenolic Antioxidant, Methoxyphenol Polymerization Inhibitor, Methoxyphenol Acrylic Additive, MEHQ Polymer Chemistry Additive, MEHQ Monomer Protection Agent, MEHQ Stabilizing Agent, p-Methoxy Hydroquinone Derivative, Monomethyl Hydroquinone, Anisidinic Phenol (trade synonym), p-Methyl Ether Hydroquinone, Hydroxyanisole p-Form, Hydroquinone Monomethyl Ether Technical Product, MEHQ Industrial Product, p-Methoxyphenol Raw Material, MEHQ Processing Additive, MEHQ Acrylic Monomer Protector, MEHQ Vinyl Resin Inhibitor, MEHQ Chemical Stabilizer

APPLICATIONS

p-Methoxyphenol is used as a polymerization inhibitor in acrylate monomers.
p-Methoxyphenol prevents premature polymer formation during storage and transport.
p-Methoxyphenol ensures safe handling of reactive monomers.

p-Methoxyphenol is employed in methacrylate systems such as MMA and HEMA.
p-Methoxyphenol stabilizes monomers against thermal and oxidative degradation.
p-Methoxyphenol prolongs shelf life of light-sensitive formulations.

p-Methoxyphenol is used in the production of resins and coatings.
p-Methoxyphenol enhances oxidative stability and storage performance.
p-Methoxyphenol contributes to improved clarity and color retention.

p-Methoxyphenol is used as an antioxidant in adhesives and sealants.
p-Methoxyphenol improves durability and prevents radical-initiated degradation.
p-Methoxyphenol enhances bonding performance in reactive systems.

p-Methoxyphenol serves as an intermediate in pharmaceuticals.
p-Methoxyphenol participates in synthesis of biologically active compounds.
p-Methoxyphenol provides phenolic functionality for targeted reactions.

p-Methoxyphenol is used in cosmetic formulations.
p-Methoxyphenol functions as a stabilizer in creams and emulsions.
p-Methoxyphenol improves product shelf life.

p-Methoxyphenol is utilized in fragrance and flavor production.
p-Methoxyphenol is a precursor for anisole-based aroma compounds.
p-Methoxyphenol enables controlled substitution reactions.

p-Methoxyphenol is used in agrochemical synthesis.
p-Methoxyphenol participates in formation of phenoxy herbicide intermediates.
p-Methoxyphenol contributes to formulation stability.

p-Methoxyphenol is employed in UV absorber and dye manufacturing.
p-Methoxyphenol provides aromatic structure for chromophore construction.
p-Methoxyphenol enhances photostability in polymers.

p-Methoxyphenol is used in analytical chemistry applications.
p-Methoxyphenol serves as a reagent or standard in oxidative studies.
p-Methoxyphenol acts as a radical quencher in test systems.

p-Methoxyphenol is used as a polymerization inhibitor.
p-Methoxyphenol prevents premature polymerization in monomers such as styrene and acrylics.
p-Methoxyphenol stabilizes reactive monomer mixtures during storage and transport.

p-Methoxyphenol is used as an antioxidant in industrial formulations.
p-Methoxyphenol protects organic compounds from oxidative degradation.
p-Methoxyphenol enhances shelf life of sensitive chemical ingredients.

p-Methoxyphenol is used in the production of UV-curable resins.
p-Methoxyphenol prevents uncontrolled photopolymerization under light exposure.
p-Methoxyphenol enables consistent curing behavior in UV formulations.

p-Methoxyphenol is used in photographic developer solutions.
p-Methoxyphenol reduces image fog formation in film development.
p-Methoxyphenol stabilizes photographic chemicals during storage.

p-Methoxyphenol is used as a precursor in organic synthesis.
p-Methoxyphenol is used to produce anisole derivatives and specialty aromatic compounds.
p-Methoxyphenol participates in oxidative and substitution reactions in fine chemical synthesis.

p-Methoxyphenol is used in fragrance and flavor chemistry.
p-Methoxyphenol serves as an intermediate in the synthesis of aromatic esters.
p-Methoxyphenol contributes to sweet, floral aromatic profiles.

p-Methoxyphenol is used in pharmaceutical intermediate production.
p-Methoxyphenol acts as a building block for active pharmaceutical ingredients.
p-Methoxyphenol participates in synthesis of analgesics and anti-inflammatory agents.

p-Methoxyphenol is used in cosmetic formulations at controlled levels.
p-Methoxyphenol functions as an antioxidant to protect formula integrity.
p-Methoxyphenol stabilizes ester-containing cosmetic ingredients.

p-Methoxyphenol is used in analytical chemistry.
p-Methoxyphenol serves as a reagent in redox studies.
p-Methoxyphenol is used in calibration standards for phenolic compound analysis.

p-Methoxyphenol is used in rubber processing.
p-Methoxyphenol prevents oxidative degradation of rubber intermediates.
p-Methoxyphenol contributes to long-term stability of rubber chemicals.

p-Methoxyphenol is used in epoxy resin systems.
p-Methoxyphenol slows unwanted crosslinking during storage.
p-Methoxyphenol enhances thermal stability of reactive epoxy monomers.

p-Methoxyphenol is used in acrylic adhesive production.
p-Methoxyphenol controls the curing rate in pressure-sensitive adhesives.
p-Methoxyphenol prevents gel formation in stored adhesive formulations.

p-Methoxyphenol is used in coatings and paint systems.
p-Methoxyphenol protects unsaturated resins from oxidation.
p-Methoxyphenol increases stability of solventborne and waterborne coatings.

p-Methoxyphenol is used in industrial ink formulations.
p-Methoxyphenol stabilizes monomers in UV-inkjet inks.
p-Methoxyphenol ensures reliable ink viscosity over time.

p-Methoxyphenol is used in alkyd resin stabilization.
p-Methoxyphenol prevents premature gelling during resin storage.
p-Methoxyphenol ensures consistent curing performance in alkyd coatings.

p-Methoxyphenol is used in fine chemical production involving aromatic ethers.
p-Methoxyphenol helps introduce methoxy groups in complex aromatic molecules.
p-Methoxyphenol supports synthesis of performance chemicals with controlled substitution patterns.

DESCRIPTION

p-Methoxyphenol appears as white to slightly beige crystalline solid.
p-Methoxyphenol has a mild aromatic phenolic odor.
p-Methoxyphenol is soluble in ethanol, ether, and alkali solutions.

p-Methoxyphenol exhibits strong antioxidant properties.
p-Methoxyphenol scavenges free radicals during storage of monomers and resins.
p-Methoxyphenol absorbs UV light and prevents photochemical reactions.

p-Methoxyphenol must be handled with care due to potential skin sensitization.
p-Methoxyphenol is stable under dry and cool storage conditions.
p-Methoxyphenol is a key component in stabilizing acrylics, resins, adhesives, and industrial intermediates.

p-Methoxyphenol is a white to off-white crystalline solid with a faint phenolic odor.
p-Methoxyphenol is stable under recommended storage conditions.
p-Methoxyphenol has good solubility in alcohols and organic solvents.

p-Methoxyphenol exhibits strong antioxidant properties.
p-Methoxyphenol scavenges free radicals generated by heat, UV, or oxygen.
p-Methoxyphenol helps maintain chemical integrity in reactive monomers.

p-Methoxyphenol is compatible with a variety of acrylates and methacrylates.
p-Methoxyphenol integrates well into resin and polymer systems.
p-Methoxyphenol provides effective stabilization at low dosage levels.

p-Methoxyphenol has a high purity profile for industrial and specialty uses.
p-Methoxyphenol maintains good color stability during processing.
p-Methoxyphenol supports long-term storage performance.

p-Methoxyphenol is thermally stable.
p-Methoxyphenol resists undesired oxidation under controlled conditions.
p-Methoxyphenol can be blended with other inhibitors for synergistic performance.

PROPERTIES

Chemical Formula: C7H8O2
Molecular Weight: 124.14 g/mol
Appearance: White to off-white crystalline solid
Odor: Mild phenolic odor
Melting Point: 54–56°C
Boiling Point: ~243°C
Solubility: Soluble in ethanol, ether, acetone, and organic solvents
Reactivity: Readily reacts with free radicals
Stability: Stable when stored cool and protected from light
pH: Slightly acidic (phenolic)
Flash Point: ~121°C (closed cup)

FIRST AID

Inhalation:
Move to fresh air.
Seek medical attention if irritation occurs.

Skin Contact:
Wash thoroughly with soap and water.
Remove contaminated clothing.
Seek medical help if redness or irritation develops.

Eye Contact:
Rinse gently with water for several minutes.
Seek medical attention if symptoms persist.

Ingestion:
Rinse mouth with water.
Do not induce vomiting.
Seek medical care if discomfort occurs.

Note to Physicians:
Treat symptomatically; phenolic compounds may cause irritation.

HANDLING AND STORAGE

Handling:
Use gloves, goggles, and protective clothing.
Avoid dust formation and inhalation.
Handle under well-ventilated conditions.

Ventilation:
Use local exhaust when handling powders.

Avoidance:
Avoid heat, direct sunlight, and oxidizing agents.
Avoid contact with strong bases and strong acids.

Spill Procedures:
Sweep or collect solid material carefully.
Place in appropriate waste container.

Storage:
Store in a cool, dry area.
Keep containers tightly closed.
Protect from heat and light to maintain inhibitor activity.