EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1944.8-1G Sodium tetraethylborate, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 15523-24-7 Price on request 1892.12-100-DC Endrin, 100µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 72-20-8 Price on request 0432.13-K-IO 4-Methylbiphenyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 644-08-6 Price on request