Abstract
A dosimeter badge has been developed which does for hydrazine fuel handlers what a film badge does for handlers of ionizing radiation. On exposure to vapors of hydrazines and other volatile bases the sensitive material contained in the badge develops a color whose intensity is approximately proportional to the integrated concentration-time value to which the badge has been exposed. Color standards are on the badge, so that the color and therefore the concentration times time of exposure can be estimated by fuel handlers in the field. The colorimetric substance is bindone, [Δ1,2′-biindan]-1′,3,3′-trione, impregnated on thin-layer chromatography material.