Tris (1,3-dichloro-2-propyl) phosphate (TDCPP) 0.58 g/m 3 Triphenyl phosphate (TPP) 0.83 g/m 3 Tris(2-butoxyethyl) phosphate (TBEP) 0.40 g/m 3 2-Ethylhexyl diphenyl phosphate (EHDPP) 0.59 g/m 3 Tris(2-ethylhexyl) phosphate (TEHP) 0.43 g/m 3 Tri-o-cresyl phosphate (TOCP) 0.70 g/m 3 Tricresyl phosphate (TCP) (4 m/p-isomers) 0.48 g/m 3 at as ample volume of 480 L, as ample solution of 1m La nd an injection volume of 1L Recovery: 91-107% Sampling recommendation: Sampling time: Air sample volume: 2to8h 120 to 960 L Description of the substances Trialkyl and triaryl phosphatesThe phosphoric acid esters described here have aw ide range of application, in particular as flame retardants and plasticisers.Consequently, exposure of employees handling OPCs cannot be ruled out.The selected OPCs have the following general chemical structure in common: Structural formula of the organic phosphorus compounds (OPCs):R=aryl or alkyl groups with or without halogen substituentsTriisobutyl phosphate (TIBP)