Internal Standard Back Catalog number: 95665 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71378 4,4’-Diamino-3,3’-dimethyldiphenylmethane Price on request 674658 D4-1,4-Dichlorobenzene, 2000 µg/ml, Methanol, 1m Price on request 678427 Heptachlor-exo-epoxide, 100 µg/ml, Acetonitrile, Price on request