CAS 4509-90-4 appears in our catalog under these names: 5–Bromovaleryl chloride, 5-Bromovaleryl chloride, 98% , 5-Bromovaleryl Chloride, >98.0%(T), 5-Bromopentanoyl chloride 97%, 5-BROMOVALERYL CHLORIDE, 97%. Offered by: GLPBio, Thermo Scientific (Alfa Aesar), TCI, Ambeed, Sigma-Aldrich. Available pack sizes: 100g, 250g, 25g, 5g, 1g, 5 g, 10 g, 10g.