8260 Surrogates / Internals Standard Back Catalog number: 91515 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C14464800 1-(4-Isopropylphenyl)-3-methylurea, 100mg Price on request 63177 2,2',3,3',4',5,6-Heptachlorobiphenyl (177) Price on request 3391.9-100-AN Endosulfan Price on request