GC test mixture haloform for controlling the performance of fused silica capillary columns and the GC system. Contents (in µg/mL): 9 halogenated hydrocarbons in increased concentration for calibration acc. to German Industrial Standard DIN 38407, part 5- dichloromethane (158.4), trichloromethane (14.9), 1,1,1-trichloroethane (13.4), tetrachloromethane (15.9), trichloroethene (14.6), bromodichloromethane (20), dibromochloromethane (24.5), tetrachloroethene (16.2), tribromomethane (28.9). This product contain harmful substances which must be specially labeled as hazardous. For detailed information please see SDS.