trans-Cinnamic acid CAS 140-10-3 rheumatic drug ketoprofen, etc.), curing accelerators.
5-Chloro-2,3-difluoropyridine CAS 89402-43-7 Meta-bromobenzoic acid is a kind of very important chemical intermediates, which are widely used in analysis and detection (chemical reagents), organic synthesis and pharmaceutical intermediates (anti-rheumatic drug ketoprofen, etc.), curing accelerators.