Instrument Standard 4 Back Catalog number: 52080 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79204 4,4’-Dichlorobenzophenone Price on request 93983 Dibromoacetic acid Price on request XA14073100CY gamma-HCH D6 100 µg/mL in Cyclohexane,1ml Price on request