Tetraethyl 2,2'-(1,4-phenylenedimethylidyne)bismalonate UV-988 CAS 6337-43-5

Tetraethyl 2,2'-(1,4-phenylenedimethylidyne)bismalonate is an organic compound derived from malonic acid and terephthalaldehyde, with the chemical formula C₂₄H₂₈O₈. It typically appears as a pale yellow to yellow crystalline solid, with a faint characteristic odor. Soluble in organic solvents such as ethanol, ethyl acetate, dichloromethane, and toluene, but practically insoluble in water. Commonly used as a building block in organic synthesis, particularly in the preparation of conjugated polymers, fluorescent dyes, and photoactive materials. Also functions as a crosslinking agent in polymer chemistry and as an intermediate in the synthesis of pharmaceutical and agrochemical compounds. Stable under normal storage conditions but should be protected from light and moisture.