Is the chemical: sponsored (Sp), exempted (E1-3-5), being handled under OECD, or an unsponsored chemical (U)?
Indicates whether the chemical is: Sp: a sponsored chemical; E1: exempted because EPA determined at the outset that sufficient data were already available or that more data would not aid in understanding the chemical s hazard potential; E3: exempted because it is a polymer or inorganic not subject to the HPV Challenge program; E5: exempted because EPA determined it is no longer qualifies as a high-production-volume chemical (i.e., is no longer produced in quantities of one million pounds or more annually); OECD: being handled exclusively under the OECD Screening Information Data Set (SIDS) Program; or U: an unsponsored chemical, i.e., an HPV chemical within the scope of the program that has neither been sponsored nor exempted.
