ppear within a short time following termination of exposure."PRECURSOR"Any chemical reactant which takes part at any stage in the production by whatever method of a toxic chemical. This includes any key component of a binary or multicomponent chemical system. (For the purpose of implementing this Convention, precursors which have been identified for the application of verification measures are listed in Schedules contained in the Annex on Chemicals.)"CHEMICAL WEAPONS"(a) Toxic chemicals and their precursors, except where intended for purposes not prohibited under this Convention, as long as the types and quantities are consistent with such purposes; (b) Munitions and devices, specifically designed to cause death or other harm through the toxic properties of those toxic chemicals specified in subparagraph (a), which would be released as a result of the employment of such munitions and devices; (c) Any equipment specifically designed for use directly in connection with the employment of munitions and devices specified in subparagraph (b)."Back to Top *CWC.html* SCHEDULE 1The following criteria were used to determine whether a toxic chemical or precursor should be listed in Schedule 1:It has been developed, produced, stockpiled or used as a chemical weapon as defined in Article II of the CWC; It poses otherwise a high risk to the object and purpose of the CWC by virtue of its high potential for use in activities prohibited under the CWC because one or more of the following conditions are met: It possesses a chemical structure closely related to that of other toxic chemicals listed in Schedule 1, and has, or can be expected to have, comparable properties; It possesses such lethal or incapacitating toxicity as well as other properties that would enable it to be used as a chemical weapon; It may be used as a precursor in the final single technological stage of production of a toxic chemical listed in Schedule 1, regardless of whether this sta...