2,3,4-Trichloronitrobenzene (CAS 17700-09-3) has a molecular formula of C?H?Cl?NO? and a molecular weight of 226.44 g/mol, with three chloro substituents at C2/C3/C4 and a nitro group (-NO?) on the benzene ring. As a key halogenated aromatic intermediate, it is widely used in synthesizing pharmaceuticals, agrochemicals, and specialty chemicals. It requires sealed storage in a cool, dry place to prevent moisture-induced degradation, ensuring chemical stability for subsequent reactions.