CAS 1897-49-0 appears in our catalog under these names: 2,5-Difluoroterephthalonitrile 97%, 2,5-Difluoroterephthalonitrile, 97%, 97%, 2,5-Difluoro-1,4-benzenedicarbonitrile, 98%. Offered by: Ambeed, Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 5g.