4-Phenylbenzophenone (CAS 2128-93-0) – 99 % Min White to-Off-White UV-Grade Ketone for Photopolymers, OLED

4-Phenylbenzophenone (CAS 2128-93-0) – 99 % Min White to-Off-White UV-Grade Ketone for Photopolymers, OLED Featured Image
  • 4-Phenylbenzophenone (CAS 2128-93-0) – 99 % Min White to-Off-White UV-Grade Ketone for Photopolymers, OLED

Short Description:

4-Phenylbenzophenone (CAS 2128-93-0) is a white-to-off-white crystalline powder with a melting point of 101–103 °C, ≥99 % GC purity, and ≤0.50 % loss on drying. The para-phenyl substitution extends π-conjugation, delivering high molar extinction coefficients and excellent photostability—ideal for UV-curable inks, OLED charge-transport layers, lithium-battery electrolyte photoinitiators, and high-performance polymer stabilizer


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Product introduction

4-Phenylbenzophenone is a high-purity aromatic ketone compound characterized by its biphenyl core linked to a benzophenone structure. This molecular configuration provides excellent photochemical stability, thermal resistance, and chemical reactivity, making it an important intermediate in organic synthesis, photoinitiator production, and advanced material manufacturing.

Our 4-Phenylbenzophenone is produced under strict quality control, achieving ≥99% purity, low moisture content (Loss on Drying ≤0.50%), and a precise melting point of 101–103°C. It is supplied as a white to off-white crystalline powder with excellent handling and storage stability.

Item Specification
Product Name 4-Phenylbenzophenone
CAS Number 2128-93-0
Appearance White to off-white crystalline powder
Purity ≥ 99%
Loss on Drying ≤ 0.50%
Melting Point 101 – 103°C
Molecular Formula C₁₉H₁₄O
Molecular Weight 258.32 g/mol
Boiling Point Approx. 410°C
Storage Store in a cool, dry, and well-ventilated environment
Packaging Sealed bags, fiber drums, or customized packaging

 

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Property Standard Test Method Advantage
Chemical Name 4-Phenylbenzophenone (p-Terphenyl ketone) IUPAC nomenclature Exact structure, no positional isomers
CAS Number 2128-93-0 CAS Registry Global traceability
Appearance White to off-white powder Visual @ 25 °C Low color index for optical clarity
Purity (GC) ≥99.0 % GC-FID High reactivity, fewer side reactions
Loss on Drying ≤0.50 % USP <731> (105 °C / 2 h) Prevents bubble formation in UV films
Melting Point 101–103 °C DSC Sharp melting aids melt-processing
Molecular Formula C₁₉H₁₄O Elemental analysis Matches theoretical stoichiometry
Molecular Weight 258.32 g mol⁻¹ Calculated Precise molar dosing
Particle Size D90 ≤150 µm (standard) ≤50 µm (micronized) Laser diffraction Tailored for extrusion or inkjet inks
Ash / Residue on Ignition ≤0.1 % USP <281> Low ionic contamination for electronics
Heavy Metals ≤10 ppm total (Pb ≤2 ppm) ICP-MS Meets RoHS & REACH Annex XVII
Photoinitiation λmax (THF) 258 nm, 330 nm UV-Vis  

 

Applications of 4-phenylbenzophenone

4-Phenylbenzophenone is a versatile compound widely used in the following industries:

Photoinitiators and UV-curable coatings: It plays a vital role as an intermediate for photoinitiators used in inks, adhesives and coatings.

 Polymer and Resin Industry: This compound enhances the thermal stability and light resistance of various polymers.

 Drug synthesis: It serves as a precursor for the synthesis of complex organic molecules and active pharmaceutical ingredients (APIs).

 Fine chemicals: used to formulate specialty chemicals with specific functional properties.

Key use cases in the industry:

UV-curable coatings and inks: Used as a Type II photoinitiator in 3D printing resins.

OLED Electronics: used as a dopant in the hole transport layer (HTL).

Lithium-ion batteries: used as a photocrosslinker in gel polymer electrolytes.

Polymer Stabilizer: acts as a UV absorber graft for PET and PC films.

Pharmaceutical intermediate: As a scaffold for antiviral benzophenone hydrazone.

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