EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10269.14-100MG 2,2'-Dihydroxy-4-methoxybenzophenone, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 131-53-3 Price on request 72044 Vinyl chloride-d3 Price on request 59601 ICP-MS Mix Price on request