Element: RegistryNumber
Contains the unique registry number for a chemical substance, as designated by either the Chemical Abstracts Service, Enzyme Nomenclature, or Food and Drug Administration's Unique Ingredient Identifiers. A zero value indicates that no registry number is available.
Content Model
( #PCDATA )
Contains only text (#PCDATA)
May be contained in:
Examples
<RegistryNumber>EC 3.1.1.34</RegistryNumber>