Inventory UVCB substances

UVCB substances are substances of unknown or variable composition, complex reaction products, and biological materials that cannot be represented by unique structures and molecular formulas. Some UVCB substances are not adequately described by their CA Names and have supplemental definitions that are considered integral parts of the names for TSCA purposes. The guidance, entitled Toxic Substances Control Act Inventory Representation For Chemical Substances Of Unknown Or Variable Composition, Complex Reaction Products And Biological Materials UVCB Substances points out that any substance that matches a CA Name but is not covered by the substance description is not considered to be covered by that Inventory listing. 

A dagger(t) is found next to the CASRN in the printed TSCA Inventory to indicate that a definition exists for that chemical substance. These definitions appear in Appendix A of volume 1 of the 1985 Edition of the TSCA Chemical Substances Inventory. Persons using various online versions need to be certain that they obtain any definitions that may pertain to UVCB substances of interest before they make Inventory determinations. The definitions are usually found in fields separate from the main CA names, and so may be overlooked. UVCB Substances. 3.UVCB Substances, IID. 

Toxic Substances Control Act Inventory Representation For Chemical Substances Of Unknown Or Variable Composition, Complex Reaction Products And Biological Materials UVCB Substances UVCB Substances... 

The TSCA Inventory provides an overall picmre of the organic, inorganic, polymers, and UVCB (chemical substances of Unknown, or Variable Composition, Complex Reaction Products, and Biological Materials) chemicals produced, processed, or imported for commercial purposes in the United States. The Inventory is not a list of chemicals based on toxic or hazardous characteristics, since toxicity/hazard is not a criterion for inclusion in the list. The Inventory includes chemical substances of any commercial use in the United States since 1979 under the Environmental Protection Act, and is prepared by the US-EPA. The current TSCA Inventory contains approximately 81,600 chemicals. Currently, OPPT is focusing on a subset of approximately 3,000 HPV... 

Substances that are either biological materials or made from biological materials may be listed as UVCB products on the Inventory if they are not natural products. Natural products do not have to be listed on the Inventory. Natural products are those that occur in nature and are either unprocessed or processed only by manual, mechanical, or gravitational means by dissolution in water by flotation or by heating solely to remove water or which is extracted from air by any means. EPA gives beeswax CAS Number 12-89-3 as an example of a product that is not natural and explains ... 

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