Module 20, The Extended SDS Understanding Exposure Scenarios (20.014)

  • 06 December 2017
  • 09:00 - 16:30
  • H10 London Waterloo, 284 to 302 Waterloo Road, London SE1 8RQ
  • 0


  • £245 (+VAT) - Discounted price for bookings taken before 3 October 2017.

    For CHCS Members only.

    We'd be pleased to welcome you as a Member, and then you may reserve your place. To join us, please see:
  • £295 (+VAT) - Full price for bookings taken after 3 October 2017.

    For CHCS Members only.

    We'd be pleased to welcome you as a Member, and then you may reserve your place. To join us, please see:

Registration is closed


When hazardous substances are registered under REACH, it is necessary to make an assessment of risk for known uses of the substance and resulting mixtures to ensure that the uses for which are ‘suitable’ and risk can be managed. As part of this, exposure estimates resulting from scenarios of use are part of the chemical safety report (CSR) and the results of the CSR need to be communicated onwards to downstream users.

The SDS is the primary tool for communication and it is now necessary to identify these uses and describe the scenarios of use that have been considered when registering substances. This extended SDS is now required for registered hazardous substances and as they filter down the supply line, the findings will need to be taken into account by those preparing mixtures.

The exposure scenario (ES) for each of the uses identified in Section 1 of the SDS therefore needs to be part of the extended SDS and needs to be readable and relevant for the anticipated users (customers). The level of detail will reflect the degree of hazard and the knowledge of the recipient.

This one-day course aims to cover the principles of exposure assessment and the extended SDS, linking the technical concepts covered in Module 53 with regulatory and practical requirements. By responding to feedback to give more time to this topic, some of the data and scientific issues have been moved to Module 53 thus allowing Module 20 to include more in depth examination of example ES and a chance to prepare parts of the ES using CSRs or other sources of information.

Who should attend?

The module is designed for those involved in chemical safety assessment and communication, within the context of product stewardship and with a particular focus on supply regulations, including REACH. Those receiving or preparing extended SDS will benefit.

Those attending should already understand the broad concepts of chemical supply legislation, including REACH, and also understand the science of data assessment including physico-chemical data, basic toxicology and basic ecotoxicity, as well as good working knowledge of the SDS. An understanding of the principles of DNELs and PNECs will also be of help.

Please note this Module is not suitable for newcomers to this area. It is recommended that delegates have previously attended Module 15 'Advanced Preparation of SDSs’ or Module 53 ‘Risk Characterisation and The Chemical Safety Report’ or have similar experience in writing SDSs and in reading/understanding CSRs.

Benefits of attending

Attendance on this module will ensure that you are up to date with the requirements for the production of Extended SDS. To ensure the most effective training with optimum involvement in participative exercises, there will be a limit of 14 on the number of students.

IOSH members are entitled to include this module in their continuing professional development records.

What you will learn

This module will cover the following points to assist writers in producing Annexes to their SDSs.

  • Technical and regulatory background
    • Importance of communication – why is the ES needed ?
    • Basic principles of exposure assessment and understanding risk
    • Legislative framework for chemical supply
  • Relevance of hazard assessment - ‘Chemical Safety Assessment’
    • Environmental and health hazards
    • Types of data and endpoints
    • Safe levels and limits for health (DNELs / WEL etc )
    • Safe levels for the environment (PNEC)
  • Considering exposure - Exposure Scenarios / Emission Scenarios
    • Patterns of exposure
    • Environmental exposure - atmospheric, aquatic and terrestrial
    • Workplace exposure – industrial and professional
    • Exposure to general public including secondary exposure through food and water
    • Use of default data and guidance
  • The Extended SDS
    • Overview of requirements document
    • Practical review of template(s) including CSR templates
    • Practical review of formatting and content
    • Communication through supply chain
  • Further options
    • Practical attempts at preparing ES and determining if level of exposure is acceptable
    • Risk Management Measures

Module Tutor

The training will be given by Mark Selby of Denehurst Chemical Safety Ltd. Mark had many years’ experience with a major test house before setting up his own business and runs the very successful CHCS modules on ecotoxicology, advanced SDS writing and Exposure Scenarios.


This is not an introduction to REACH course, some knowledge of the principles of REACH and chemistry is essential. This is predominantly a science-based day to consider how to characterise risk.

During the practical session, the targeted risk assessment model (ECETOC TRA) and EUSES (European Union System for the Evaluation of Substances) software will be demonstrated, and real CSR will be used.

Pre-attendance reading material will include links to download EUSES and ECETOC TRA models and it will be beneficial for those attending to bring laptops with these models installed. This is not essential, but may help; fully charged batteries are also recommended as plug sockets may be limited.

SCHC Members
We are delighted to offer members of the Society for Chemical Hazard Communication our training courses at CHCS Member rates. If you are a SCHC Member and would like to attend this course please contact the CHCS office at

Your attention is drawn to the conditions below:

Delegates can be substituted at any time, subject to payment of membership fee if applicable. However, once booked, the full fee is payable. As this is a limited space training event refunds can only be made if CHCS is notified in advance, and is able to successfully re-offer the place to another delegate.

CHCS reserves the right to alter or cancel the programme due to circumstances beyond our control. If CHCS cancels, then refunds will be made.

CHCS Training


  • Other events are in preparation


CHCS Membership is open to any person with an interest in chemical hazard communications. You can join by completing the simple on-line form at Join CHCS. Membership is currently £78 (+ £15.60 VAT where applicable; a total of £93.60).  

Contact CHCS

  • General, membership and events/training enquiries:, tel+ 44 (0) 333 210 2427 (option 1)

  • For all enquiries related to invoices, payments and any other accounting issues:, tel:
     + 44 (0) 333 210 2427 (option 2)

See full CHCS Contact Details.

© Chemical Hazards Communication Society

Privacy Notice
Data Protection Policy
Website Privacy Policy

Powered by Wild Apricot Membership Software