EPA Method 507 - Internal Standard Back Catalog number: 19031 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4657-100-IO PBDE-Mix 15, 100ug/mL in IO, 1ml Price on request 0655.30-K-IO Squalene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 111-02-4 Price on request 679726 Phorate-sulfone, 100 µg/ml, Cyclohexane, 1ml Price on request