HD-SIM: methyl salicylate: Yellowish liquid, oily appearance, spreads rapidly or produces droplets on the surface. Not soluble and denser than water. HD profile characteristic on field detectors. Persistence equivalent to HD agent. Low volatility at 20 ° C. Red to detector paper. Contains a fluorescent tracer visible under UV lamp.
VX-SIM: polypropylene glycol monobutyl ether: viscous yellow to brown oil spreading rapidly on the surface. Not soluble in water. Profile V on field detectors. Very persistent. Very low volatility at 20 ° C. Green paper detector. Contains a fluorescent tracer visible under UV lamp.
GB-SIM: Dipropylene glycol monomethyl ether: Colorless liquid that spreads rapidly on surfaces. Characteristic profile on field detectors. Persistence expressed in hours comparable to GB. Very high volatility at 20 ° C. Yellow to paper detector. Contains a fluorescent tracer visible under UV lamp.