Photoinitiator 2959 (2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, Irgacure 2959, >99.0%) for Solid-State & Gel Polymer Electrolytes (GPEs), 50-200 g/bottle, CSSGPEPI2959
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Photoinitiator 2959—chemically known as 2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (C12H16O4), and widely recognized under commercial designations such as Irgacure 2959—is a highly efficient, water-compatible Type I hydroxyketone photoinitiator. In advanced energy storage research, Photoinitiator 2959 is utilized for the rapid UV-curing of aqueous and polar Gel Polymer Electrolytes (GPEs), hydrogel electrolytes, and eco-friendly polymer matrix systems (such as those deployed in aqueous zinc-ion, sodium-ion, and lithium-ion batteries).
Its main features are: (1) Type I alpha-Cleavage Mechanism: Upon absorption of ultraviolet radiation (primarily within the 250-320 nm range), Photoinitiator 2959 undergoes rapid unimolecular alpha-cleavage adjacent to the carbonyl group, generating active benzoyl and hydroxyalkyl radicals that initiate efficient vinyl chain polymerization. (2) Enhanced Aqueous & Polar Compatibility: Unlike standard hydrophobic photoinitiators (such as HCPK / Irgacure 184) that exhibit poor solubility in water, the secondary aliphatic hydroxyl group on the ethoxy substituent grants Photoinitiator 2959 significant water solubility (up to ~1–2 wt% in pure water at room temperature) and excellent miscibility in polar organic co-solvents. (3) Exceptional Biocompatibility & Low Cytotoxicity: Widely utilized in biomedical hydrogels and tissue engineering due to its low toxicity profile, ensuring that photolytic cleavage fragments do not generate aggressive acidic species or trigger parasitic redox side reactions. (4) Non-Yellowing Photostability: Exhibits high resistance to discoloration upon UV exposure, maintaining the optical and chemical integrity of the crosslinked electrolyte matrix.
| Part Number |
CSSGPEPI2959 (C-SSGPE-PI2959) |
| CAS |
106797-53-9 |
| Chemical Formula |
C₁₂H₁₆O₄  |
| Molecular Weight |
224.25 g/mol |
| Appearance |
Slight grey white powder |
| Melt Point |
86-90 ℃ |
| Absorption Wavelength |
274 nm and 330 nm (in methanol solution) |
| Package Size | 50 g, 100 g, and 200 g/bottle |
Notes: Please try to store the photoinitiator 2959 power or solution in a dry place and dark place.
References:
- C. Li, et al. Activating the Mn2+/Mn7+ redox for a neutral Zn||Mn-compound battery with 2.2-V discharge plateau, Science Advances, 2026, 12, DOI: 10.1126/sciadv.aea14
- S. Ali, et al. Photo cured 3D porous silica-carbon (SiO2–C) membrane as anode material for high performance rechargeable Li-ion batteries, Journal of Alloys and Compounds, 2020, 812, 152127