EPA Method 525 Internals & Surrogates Back Catalog number: 95227 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 358372 Fexofenadine hydrochloride, 95%, 5g Price on request BPF 4,4'-Dihydroxydiphenylmethane, 1.2ml x 50ug/ml, methanol Price on request 673641 Monocrotophos, 10 µg/ml, Ethyl acetate, 10ml Price on request