BTEX Standard Back Catalog number: 92793 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673047 Hexadecyltrimethylammonium bromide, 250mg Price on request 675177 2,3,5-Trimethylphenol, 100 µg/ml, Methanol, 5ml Price on request 79172 Propachlor Price on request