What to include for Inventory Expert Service submission

Please include the following information for Inventory Expert Service processing.

Completed Inventory Expert Service Order Form

• Indicate rush service (if applicable)
• CAS RN^® (if desired; CA Index Name is standard output)

For a Class 1 substance* - See PMN page 4

• Molecular formula
• Descriptive chemical name (if possible)
• Structure

For a Class 2 nonpolymeric substance** - See PMN page 4

• CAS RNs for starting materials
• Process information
• Composition
• Representative structure of final product

For a Class 2 polymeric substance** - See PMN page 5

• Descriptive chemical name, CAS RN, and percentage of each starting monomer
• Representative structure with monomers linked together
• Free Radical Initiator, CAS RN, and percentage (if needed)
• All monomers and initiators indicated applying the 2% rule

*Class 1 substances:

Chemical substances which are single compounds composed of molecules with particular atoms arranged in a definite, known structure.

**Class 2 substances:

Chemical substances with a variable composition or composed of a complex combination of different molecules. Class 2 substances can be further subdivided into three subgroups.

• The first subgroup includes substances that can be represented by definite Hill-ordered molecular formulae but have variable structural diagrams.
• The second subgroup includes substances that can be represented by definite molecular formulae but have unknown structural diagrams.
• The third subgroup includes representations of substances that have no definite molecular formula representation and either partial structure diagrams or no structural diagrams - often referred to as UVCBs (Unknown or Variable Composition, Complex Reaction Products, and Biological Materials).

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