CAS 20173-49-3 appears in our catalog under these names: 2–Chloro–5–methylpyridine 1–oxide, 2-Chloro-5-methylpyridine 1-oxide 95%, 2-Chloro-5-methylpyridine 1-oxide, 95%, 95%, 2-Chloro-5-methylpyridine 1-oxide, 98%(GC-MS),RG. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 250mg, 1g, 5g, 25g.