EPA Method 525 Internals & Surrogates Back Catalog number: 95227 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2663.10-100-HX Toxaphene,100 µg/mL,n-hexane,1mL, Price on request D481852 Dioctyl Terepthalate-d4, 5mg Price on request 681183 4-tert-Butylphenol, 100mg Price on request