Benzophenone is an organic compound commonly used as a UV filter in cosmetic, skincare, and sunscreen products. It is effective at absorbing UVB and short-wave UVA rays, which are responsible for skin damage, premature aging, and sunburn. Benzophenone also acts as a stabilizer for other sunscreen ingredients, preventing them from degrading under sunlight. Its ability to absorb harmful UV radiation makes it a key ingredient in sunscreens, hair care products, and other formulations designed to protect the skin and hair from UV exposure.

Photoinitiator 1173 (Chemical name: 2-Hydroxy-2-methyl-1-phenyl-1-propanone / 2-Hydroxy-2-methylpropiophenone, CAS: 7473-98-5) is a highly efficient Type I free-radical photoinitiator.
As an efficient liquid UV photoinitiator, 1173 undergoes rapid cleavage upon UV irradiation to generate free radicals, thereby initiating the polymerization and crosslinking of unsaturated resins and monomers. Its outstanding performance advantages include high initiation efficiency, fast curing speed, excellent yellowing resistance, as well as low odor and good color stability, making it highly suitable for transparent clearcoat systems with stringent color requirements. In addition, as a liquid product, it offers excellent compatibility and formulation flexibility with other photoinitiators and resin systems.

Photoinitiator 184 (Chemical name: 1-Hydroxycyclohexyl phenyl ketone, CAS: 947-19-3) is a highly efficient Type I free-radical photoinitiator.
As a classic solid photoinitiator, 184 generates free radicals through intramolecular α-cleavage upon UV irradiation, efficiently initiating the polymerization and crosslinking of unsaturated resins and monomers. Its most outstanding performance advantage lies in its excellent yellowing resistance—even after prolonged exposure to sunlight, the cured coating exhibits minimal yellowing, making it particularly suitable for transparent clearcoats and white systems with stringent color requirements. In addition, it offers advantages such as high initiation efficiency, good storage stability, low odor, and low irritation.

Photoinitiator 819 (Chemical name: Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, CAS: 162881-26-7) is a highly efficient Type I free-radical photoinitiator.
As a high-performance acylphosphine oxide photoinitiator, 819 exhibits excellent absorption in the near-UV and visible regions, with an absorption wavelength extending up to 450 nm. Its most outstanding performance advantages include strong deep-curing capability, high photoinitiation efficiency, and excellent yellowing resistance, making it particularly suitable for applications where traditional photoinitiators struggle to achieve deep curing, such as thick film systems, pigmented systems, and white coatings/inks.

Photoinitiator TPO (Chemical name: Diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide / (2,4,6-Trimethylbenzoyl)diphenylphosphine oxide, CAS: 75980-60-8) is a highly efficient Type I free-radical photoinitiator.
As a high-performance acylphosphine oxide photoinitiator, TPO exhibits a broad absorption range in the near-UV and visible regions, with an effective absorption peak at 350–400 nm, extending up to approximately 420 nm. Its most outstanding performance advantages include strong deep-curing capability, excellent photobleaching effect, fast curing speed, and superior yellowing resistance, making it particularly suitable for applications where traditional photoinitiators struggle to achieve deep curing, such as white systems, thick film systems, and pigmented coatings/inks.

Photoinitiator TMO (Chemical name: (2,4,6-Trimethylbenzoyl)bis(p-tolyl)phosphine oxide, CAS: 270586-78-2) is a highly efficient Type I free-radical photoinitiator.
As a high-performance acylphosphine oxide photoinitiator, TMO exhibits excellent absorption at 385–420 nm, making it ideal for UV-LED curing systems. Its key advantages include strong deep-curing capability, fast curing speed (30–50% faster than TPO), and excellent yellowing resistance. More importantly, TMO is a safer alternative to TPO—free from the phenyl-phosphorus bond that led to TPO being classified as an SVHC by the EU (reproductive toxicity). TMO offers no reproductive toxicity and low migration, making it suitable for food contact packaging, cosmetics, and medical 3D printing.

Photoinitiator TPO-L (Chemical name: Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate, CAS: 84434-11-7) is a highly efficient Type I liquid photoinitiator.
As a high-performance acylphosphine oxide photoinitiator, TPO-L exhibits excellent absorption in the long-wave UV and near-visible region (absorption peak ~370 nm), making it particularly suitable for UV-LED curing systems. Its key advantages include strong deep-curing capability, low yellowing, and low odor, making it ideal for white systems, thick film systems, and coatings/inks with stringent color requirements.