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Methylhydroquinone

CAS Number
95-71-6
EC Number
202-443-7
Chemical Formula
C7H8O2
Molecular Weight
124.14 g/mol

Description

Methylhydroquinone (CAS 95-71-6 ), also known as 2,5-Dihydroxytoluene, is a substituted hydroquinone derivative used across polymer, cosmetic, and flavor industries as an antioxidant and UV stabilizer. Its ability to scavenge free radicals makes it a functional additive in systems where oxidative degradation or premature cure must be controlled during the manufacturing process. In plastics and polymer manufacturing, it acts as a polymerization inhibitor, preventing premature crosslinking during storage and processing of reactive monomers and resins. Cosmetic formulators incorporate it into topical preparations where antioxidant stabilization of the formulation matrix is required to maintain product integrity and shelf life. In flavor and fragrance applications, it contributes to aroma profiles and functions as a preservative component in finished flavor systems for various consumer goods. Pharmaceutical manufacturers also use it as a synthetic intermediate in the production of active ingredients and specialty fine chemicals for the global healthcare market. The product is supplied as a white to off-white crystalline powder and is available in technical and pharmaceutical-intermediate grades with purity levels typically at 98% or higher. Packaging options range from kilogram-scale bags to bulk drum quantities to suit both R&D and commercial production requirements for industrial and laboratory applications. Contact us for supply of Methylhydroquinone Request Quote

Other Names (Synonyms)

2-Methylhydroquinone | 2-methylbenzene-1,4-diol | 2,5-Dihydroxytoluene | p-Toluhydroquinone | p-Toluquinol | p-Toluhydroquinol | 1,4-Benzenediol, 2-methyl- | Hydroquinone, methyl-

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point128 °C
Boiling Point283.00 °C @ Press: Atm pressure
Density2.35 g/cm³
Flash Point172 °C
Appearancewhite solid
ColorGrayish-white to light beige
FormCrystalline Powder
Water Solubility77 g/L (25 ºC)
Vapor Pressure0.004Pa at 25℃
Refractive Index1.4922 (estimate)
Log P0.9 at 27℃

Safety & Handling

Danger
GHS05· CorrosiveGHS07· IrritantGHS08· Health HazardGHS09· Environment

Hazard Statements

H302Harmful if swallowed
H315Causes skin irritation
H317May cause an allergic skin reaction
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
H341Suspected of causing genetic defects
H351Suspected of causing cancer
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P272Contaminated work clothing should not be allowed out of the workplace.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P317Get emergency medical help.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29072900
Storage Class8A - Combustible corrosive hazardous materials
WGK (Germany)2