Module 3

Course Description

This module starts by covering the general concepts and principles of EU classification, before moving on to discuss the different classification processes and algorithms. You will learn how to classify substances using the ECHA inventory and how to classify substances and mixtures using data.  Key content of this module is application of algorithms to classify mixtures. There are numerous worked examples throughout, allowing you to practice applying these different methods in a supported environment.

Correct substance and mixture classification is critical because classification informs and underpins many other CLP processes, such as labelling. For some, this module will be a challenge, but for all, it will be well worth the time! 

Course content:

  • General principles and concepts of classification
  • Classification of substances using the ECHA Inventory
  • Classification of substances & mixtures using data
  • Bridging principles
  • Classification of mixtures for health and environmental hazards using algorithms
    • Mixture additivity and summation
    • Acute toxicity
    • Corrosion and irritation
    • Germ cell mutagenicity, carcinogenicity and reprotoxicity
    • STOT – single exposure and repeated exposure
    • Aspiration toxicity
    • Aquatic environment
    • Ozone layer
  • Worked examples throughout


Common problem areas addressed:

  • Different types of ECHA Inventory entry
  • Correct use of Acute Toxicity Estimates
  • Relationship between corrosion, eye damage and irritancy
  • Impacts of physical data on health classifications such as corrosion and aspiration toxicity
  • The purpose and correct application of M Factors
  • The category system for mutagenicity, carcinogenicity and reprotoxicity
  • Interaction of sub-lethal STOT properties and acute toxicity  
  • Connection between and correct application of sensitisation classification & label element EUH208

Self tests throughout at awareness & competence level. 

Awareness certification awarded at Silver level.

Competence certification awarded at Gold level.