4-Hydroxybenzophenone CAS 1137-42-4 | ≥99.0 % Off-White Crystalline Powder | High-Performance UV-Blocker

4-Hydroxybenzophenone CAS 1137-42-4 | ≥99.0 % Off-White Crystalline Powder | High-Performance UV-Blocker Featured Image
  • 4-Hydroxybenzophenone CAS 1137-42-4 | ≥99.0 % Off-White Crystalline Powder | High-Performance UV-Blocker

Short Description:

4-Hydroxybenzophenone (4-HBP, CAS 1137-42-4) is an off-white crystalline powder with ≥99.0 % GC purity, melting point 132–135 °C, and ≤0.30 % loss on drying. The para-hydroxy group delivers strong UV-A/UV-B absorption and hydrogen-bonding reactivity, making it the preferred UV-filter intermediate, antioxidant stabilizer, and pharmaceutical scaffold worldwide. Each batch is vacuum-dried at <50 °C, nitrogen-flushed, and double-sealed to guarantee low moisture, low color, and long shelf life—critical for cosmetic actives, OLED encapsulants, and photopolymer formulations.


Product Detail

Product Tags

Product introduction:

4-Hydroxybenzophenone is a high-purity organic compound belonging to the benzophenone derivatives family. Recognized for its UV-absorbing properties and excellent chemical stability, it serves as a vital intermediate in the production of UV stabilizers, photoinitiators, pharmaceuticals, and specialty chemicals.

Our product is manufactured under strict quality control protocols, achieving ≥99.0% purity, a low moisture content of ≤0.3%, and a precise melting point range of 132–135°C. The material is supplied as an off-white crystalline powder, ensuring easy handling, consistent performance, and long shelf life.

Parameter Specification
Product Name 4-Hydroxybenzophenone
CAS Number 1137-42-4
Chemical Formula C₁₃H₁₀O₂
Molecular Weight 198.22 g/mol
Appearance Off-white crystalline powder
Purity ≥ 99.0%
Melting Point 132 – 135°C
Loss on Drying ≤ 0.3%
Boiling Point  360°C
Storage Cool, dry, and well-ventilated area
Packaging 25 kg fiber drum or customized packaging
Brand Epoch

 

COA

Property Specification Test Method Competitive Advantage
Chemical Name 4-Hydroxybenzophenone IUPAC nomenclature Single isomer, no positional contaminants
CAS Number 1137-42-4 CAS Registry Globally recognized identifier
Appearance Off-white crystalline powder Visual @ 25 °C Low color index for cosmetic clarity
Purity (GC) ≥99.0 % GC-FID High conversion, minimal purification
Melting Point 132–135 °C DSC Sharp range confirms crystal purity
Loss on Drying ≤0.30 % USP <731> (105 °C / 2 h) Prevents agglomeration & color drift
Molecular Formula C₁₃H₁₀O₂ Elemental analysis Exact stoichiometry
Molecular Weight 198.22 g mol⁻¹ Calculated Precise molar dosing
Particle Size D90 ≤100 µm (standard) ≤30 µm (micronized) Laser diffraction Tailored for emulsions or extrusion
Ash / Residue ≤0.1 % USP <281> Ultra-low ionic contamination
Heavy Metals (total) ≤10 ppm (Pb ≤2 ppm) ICP-MS Meets EU Cosmetic Reg. & RoHS
UV Absorption λmax 288 nm, 325 nm (EtOH) UV-Vis Broad UV-A/UV-B coverage

 

Applications of 4-hydroxybenzophenone

4-Hydroxybenzophenone is a versatile compound with applications across various industries, primarily due to its photochemical stability and functional reactivity:

UV absorber manufacturing: It is widely used in the formulation of sunscreens, plastics and coatings to provide basic protection against UV degradation.

Photoinitiator: This compound is an essential building block in the production of UV-curable coatings, inks, and adhesives, helping to achieve an efficient curing process.

Pharmaceutical intermediates: They are precursors for the synthesis of active pharmaceutical ingredients (APIs) and fine chemicals, and play a vital role in drug development.

Polymer Stabilizer: 4-Hydroxybenzophenone enhances the UV resistance of various polymers, including polyethylene, polypropylene, and polyvinyl chloride, thereby extending their service life and performance.

Research and Development: It is widely used in organic synthesis, especially in materials science and photochemistry research, promoting progress in these fields.

Industry segments and key use cases:

Personal Care and Sunscreen: Acts as a UV-A filter in SPF 50+ creams and lotions, ensuring effective sun protection.

Polymer Stabilizer: Acts as a HALS (Hindered Amine Light Stabilizer) synergist in films made from PET, PC and TPU, enhancing their UV resistance.

OLED and Electronics: Acts as a UV-blocking encapsulation layer to protect sensitive electronic components from UV damage.

Pharmaceutical API: As a synthetic intermediate for antiviral benzophenone hydrazone, it contributes to the development of effective drugs.

Photopolymer 3D Printing: Acts as a Type II photoinitiator in SLA (stereolithography) resins, enabling a precise and efficient 3D printing process.

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