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4-methylbenzophenone

CAS Number
134-84-9
EC Number
205-159-1
Chemical Formula
C14H12O
Molecular Weight
196.24 g/mol

Description

4-Methylbenzophenone (CAS 134-84-9 ) is a photoinitiator and UV-reactive intermediate used across polymer processing, coatings, and printing industries. It absorbs UV radiation to initiate photochemical reactions, enabling rapid curing and cross-linking in light-triggered systems. In UV-curable coatings and inks, it acts as a photoinitiator that triggers polymer cross-linking upon UV exposure. This process produces hard, durable surface finishes without the need for thermal processing during the manufacturing cycle. Printing and packaging converters use it in energy-curable ink formulations where fast cure speeds are essential. These formulations meet low migration potential requirements, which are critical process standards for modern industrial printing applications. In adhesive and sealant systems, it supports photoinitiated bonding in specialized applications. This is particularly useful where heat-sensitive substrates rule out conventional curing methods that require high temperatures to set. Polymer stabilizer blends also incorporate it as a UV-stabilizing component to protect plastic substrates. This protection prevents photodegradation over the service life of the material, ensuring long-term structural integrity and appearance. 4-Methylbenzophenone is supplied as a white to off-white crystalline solid for industrial use. It is available in technical grade for formulation, with purity specifications typically at 99% or above for photoinitiator-grade applications. Packaging ranges from kilogram quantities for laboratory and formulation development to bulk drum supply. This flexibility supports both small-scale testing and large-scale industrial production volumes for global chemical distributors. Contact us for supply of 4-methylbenzophenone Request Quote

Other Names (Synonyms)

Methanone, (4-methylphenyl)phenyl- | B2F68X17BM | RefChem:99849 | phenyl(p-tolyl)methanone | Benzophenone, 4-methyl- | (4-Methylphenyl)phenylmethanone

Key Technical Features

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

Physical Properties

Melting Point59.5 °C
Boiling Point326 °C
Density1.079 g/cm³ @ Temp: 20 °C
Flash Point143 °C
Appearancewhite to beige crystalline powder or crystals
ColorWhite to beige
Odorfaint odor
FormCrystalline Powder or Crystals
Water SolubilityInsoluble in water.
Vapor Pressure0.059Pa at 25℃
Refractive Index1.5920 (estimate)
Log P3.69 at 25℃

Safety & Handling

Warning
GHS07· Irritant

Hazard Statements

H302Harmful if swallowed
H319Causes serious eye irritation

Precautionary Statements

P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P330Rinse mouth.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29143900
Storage Class11 - Combustible Solids
WGK (Germany)3