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Extended SDS (eSDS) and Exposure Scenarios

17 August 2026 /KKDIK

Extended Safety Data Sheet (eSDS) is a type of SDS prepared for harmful substances that require a Chemical Safety Report and includes exposure scenarios.

Exposure scenario; It describes how humans and the environment are exposed to the substance in specified uses and how the risk is controlled. Subusers should check whether their usage falls within these scenarios.

ONAY Mühendislik manages the creation and reflection of exposure scenarios in eSDS.

When an Extended Form is Required

The extended safety data sheet appears for substances for which a chemical safety report is required and for cases where the substance is classified as hazardous. The exposure scenarios attached to this form describe the conditions under which the substance can be used safely. The difference with the standard form is that the attached scenarios contain binding terms of use.

Structure of the Scenario

Each scenario; It consists of usage description, operational conditions and risk management measures sections. Processing conditions include quantity used, processing time, temperature and ventilation conditions. Risk management measures define concrete measures such as local ventilation, use of closed systems and personal protective equipment. The scenario also includes the estimated exposure level and risk characterization rate.

Downstream User Liability

The downstream user must compare his own conditions of use with the conditions in the scenario. If the conditions overlap, the application continues. If not, there are three options: change the conditions to fit the scenario, inform the supplier of its own use and ask for it to be added to the scenario, or prepare its own downstream user chemical safety report. This evaluation must be done within a certain period of time.

Documentation of Comparison

The most missing step in practice is not recording the comparison in writing. The question asked in the audit is not whether the script has been read, but whether it has been compared to your own circumstances. A simple comparison table meets this obligation by showing which parameter corresponds to which value.

Transfer to Field

If the scenarios remain in the quality file, they will not achieve their purpose. The ventilation, time and protective equipment requirements they contain need to be incorporated into the work instructions and risk assessment. This transfer also produces evidence in terms of occupational health and safety legislation; A single work meets both obligations.

Comparison Chart for Exposure Scenarios

After reading the Exposure Scenarios, the only concrete thing to do is to make a parameter-by-parameter comparison with your own operating conditions. A simple table with lines for ventilation, duration, temperature and quantity is sufficient. The question asked in the audit is not the existence of the Exposure Scenarios document, but whether this comparison was made.

Related pages

Contact ONAY Mühendislik for your process.

Official full text of the regulation: KKDIK Regulation - Official Gazette.

The extended safety data sheet is a version of the standard MSDS document supplemented with exposure scenarios; The core 16 episodes remain the same, with scenarios attached additionally.

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This content was prepared by ONAY experts
Gözde Goetz
Deputy General Manager
Kocaeli Üniversitesi – Chemistry · KDU Certified · 13 years of experience
[email protected] · LinkedIn
Derya İnceli
Operations Manager
Gazi Üniversitesi – Chemistry · KDU Certified · 10 years of experience
[email protected]
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