UVCB

AcronymDefinition
UVCBChemical Substances of Unknown or Variable Composition, Complex Reaction Products and Biological Materials (US EPA)
UVCBUnion des Villes et Communes Belges (French: Union of Belgian Towns and Municipalities)
UVCBUpper Valley Community Band (Hanover, NH)
UVCBUnknown, of Variable Composition, or of Biological Origin
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References in periodicals archive ?
The database is periodically updated with the TSCA Inventory tape produced by EPA, and EPA Inventory flags and UVCB substance definitions have been added.
Knight said that the next effort is to extend this further to assess read-across for multi-constituent substances and unknown or variable composition, complex reaction products and biological materials (UVCB substances) (4).
For the remaining CAS RN a well-defined structure was not available (e.g., for substances of "unknown or variable composition, complex reaction products or biological material" (UVCB) chemicals which represent around 30% of the substances registered under REACH).