EPA Method 525 Internals & Surrogates Back Catalog number: 91161 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0383.12-K-IOX5 Dibenzothiophene-d8, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 33262-29-2 Price on request 10534.28-100-IO 25-Hydroxyvitamin D2 (95%) Price on request YA18000095EA Pesticide-Mix 95, 1000µg/ml in Ethylacetate, 1ml Price on request