Survey for N-Nitroso Compounds at Crompton and Knowles Corp., Dyes and Chemicals Division, Reading, Pennsylvania, February 20-24, 1978

摘要

A survey was conducted at Crompton and Knowles Corp, Dyes and Chemicals Division, Reading, Pennsylvania, to determine whether N-nitroso compounds are contaminated in the azo dye factories, where sodium-nitrite and sometimes secondary or tertiary amines are used as raw materials for dye synthesis. Seven air samples were collected and sampled through either midget impingers containing 15ml/1N KOH or vacuum traps containing 45ml/1N KOH at ambient temperature. At a detection limit of 0.5 micrograms/g, two raw materials samples, both chlorinated nitroanilines, were found to be thermal energy analyzer (TEA) responsive compounds. Three press cake samples of the disperse dyes all contained on TEA responsive compound at concentrations of 406, 3034, and 491 micrograms/g. TEA response materials were found in every finished product of the disperse dyes.