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10
EXPLANATION OF THE COLUMNS
A short explanation of the fields and of some abbreviations is given below.

Column 1 ("REF_N")

This contains the substance reference numbers. Conventionally the following numbers have been
assigned:
Monomers: 10000-29999
Additives: >30000
A substance listed as a monomer as well as an additive will be assigned two different REF.N. In some
cases, a cross-reference of the REF.N. is inserted in order to find a substance having a synonym,
commonly used.

Column 2 ("CAS_N")

This contains the CAS (Chemical Abstracts Service) registry number, if any. If the substance is a
mixture of substances, the CAS number refers to the mixture. Where an indent has been placed in the
column, it means that a research for CAS N. has been made, but that the result was negative. If the
result of the search was found to be doubtful or that the research has not yet been made, a question
mark appears in the column. Where there is inconsistency between the CAS number and the chemical
name, the chemical name shall take precedence over the CAS number. If there is inconsistency
between the CAS number reported in EINECS and the one in the CAS-Register, the CAS-number in
the CAS-Register shall apply.

Column 3 ("NAME")

This contains the chemical name attributed by the Commission services.
In some cases, a cross-reference of the REF.N. is inserted in order to find a substance having a
synonym, commonly used (see Column 4)

Column 4 ("SYNONIM")

This contains the REF.N. of a substance being a synonym, commonly used.

Column 5 ("DIR")
This indicates that a) the substance is included in the Commission Directive 2002/72/EC, relating to
plastic materials and articles intended to come into contact with foodstuffs (as amended by Directive
2004/1/EC and Directive 2004/19/EC); b) the substance is proposed to be inserted in the next
amendment to Directive 2002/72/EC (usually referred as 3
rd
amendment) or c) the substance was
mentioned in previous directives but it was later deleted for a particular reason. There are several
reasons why a substance is deleted. For example:
The substance appears under another more appropriate name
The substance is no longer requested by the petitioner
The individual substance can be covered under a generic name
The generic name has been deleted because the substances have been introduced individually
Deleted because considered as "basic polymer". Basic polymers mean any polymeric substance, such as
plastic or polymer, which is capable of functioning as the main structural component of finished
materials and articles. They are not listed if their monomers are listed and they comply with Article 2 of
Framework Directive.