Group II Elements Starter Kit Back Catalog number: 52255 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98553 Formaldehyde (0.3 ppm) Price on request X9042 Chloroethane Price on request BB-7 2,4-Dibromobiphenyl, 1.2ml x 50ug/ml, nonane Price on request