A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. In the case of chemicals derived from fats and oils, multiple naming systems exist.
The Toxic Substances Control Act (TSCA) requires EPA to "compile, keep current, and publish a list of each chemical substance which is manufactured or processed in the United States." Since the initial TSCA Inventory was compiled in 1979, EPA has developed policy statements and guidance documents on how to identify certain chemical substances for the purpose of assigning unique and unambiguous descriptions for each substance listed on the Inventory.
The following are links to relevant nomenclature guidances:
1995 - Toxic Substances Control Act Inventory Representation for Certain Chemical Substances Containing Varying Carbon Chain Lengths (Alkyl Ranges Using the CX-Y Notation)
1995 - Toxic Substances Control Act Inventory Representation for Chemical Substances of Unknown or Variable Composition, Complex Reaction Products and Biological Materials: UVCB Substances
1979 - SDA Substance Identification Procedure, Appendix A, Toxic Substances Control Act Chemical Substances Inventory, Initial Inventory, Volume 1