Definition#
An EC number is a seven-digit identifier in the format NNN-NNN-N assigned to substances in the European inventory. The inventory draws on lists such as EINECS and ELINCS, and the final digit is a check digit.
Format
Seven digits, NNN-NNN-N
Source
European inventory, including EINECS and ELINCS
Used with
The EC number sits alongside the CAS number as a way to identify a substance in EU chemicals law. Having both gives a clear, language-independent reference when substances are declared.
Check an EC number#
The last digit is a check digit, computed from the first six. Enter an EC number to validate it and see the calculation.
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