SDS vs COSHH Assessment: Key Differences Explained Clearly

29/01/2026

When managing chemicals at work, the comparison of SDS vs COSHH assessment comes up fast. Both are essential to chemical safety management, but they do very different jobs. Knowing the difference between SDS and COSHH is critical for protecting people, meeting legal duties, and achieving COSHH compliance.

A Safety Data Sheet (SDS) is a supplier-produced document that describes a substance or mixture and its hazards. Andm COSHH (Control of Substances Hazardous to Health) requires employers, particularly in the UK, to assess and control risks from hazardous substances.

What Is an SDS (Safety Data Sheet)?

A Safety Data Sheet (SDS) is a supplier-produced document that describes a substance or mixture and its hazards. It follows a standard 16-section format under GHS, ensuring consistent, reliable information for users and regulators.

Typical SDS sections include:

  • Identification of the substance and supplier
  • Hazard identification and classification
  • Composition/ingredients
  • First-aid measures
  • Handling and storage
  • Exposure controls and recommended PPE

An SDS provides generic hazard and handling guidance for the chemical itself. Crucially, it does not assess how that substance will be used in your workplace or what controls you need day to day… points that sit at the heart of SDS vs COSHH assessment.

What Is a COSHH Assessment?

COSHH (Control of Substances Hazardous to Health) requires employers, particularly in the UK, to assess and control risks from hazardous substances. A COSHH assessment is a chemical risk assessment for your site and processes.

Unlike an SDS, a COSHH assessment vs SDS evaluation:

  • Analyses how the substance is used (task, frequency, quantity, form) and who is exposed
  • Determines appropriate controls (engineering controls, ventilation, safe procedures, training, PPE)
  • Documents actions to reduce exposure to an acceptable level and demonstrates COSHH compliance

Think of the Safety Data Sheet vs COSHH assessment like this: the SDS supplies the hazard data; the COSHH assessment interprets that data for your actual work scenario.

SDS vs COSHH Assessment at a Glance

Purpose

  • SDS: Hazard and safety information about a chemical (supplier document)
  • COSHH assessment: Workplace-specific risk evaluation and controls (employer responsibility)

Who produces it?

  • SDS: Manufacturer/supplier
  • COSHH assessment: Employer or competent person

Legal role

  • SDS: Must be supplied with hazardous chemicals
  • COSHH assessment: Required under COSHH to protect workers

Use

  • SDS: Reference to understand hazards and emergency measures
  • COSHH assessment: Basis for safe procedures, controls, training, and monitoring

Bottom line: an SDS is essential input, but it cannot replace a COSHH assessment. That distinction is the core of SDS vs COSHH assessment.

Why the Difference Matters?

Two sites can use the same chemical but face very different risks due to ventilation, task duration, quantities, and the number of exposed workers. Relying only on SDSs leaves gaps: you won’t have task-specific controls, exposure estimates, or documentation to evidence chemical safety management decisions. An SDS library without live COSHH assessments risks non-compliance and, more importantly, unsafe work.

Using Both Effectively (and Compliantly)

To meet the intent behind SDS vs COSHH assessment and remain audit-ready:

  1. Collect current SDSs for every hazardous substance.
  2. Perform COSHH assessments per task/process, using SDS data as input.
  3. Implement controls (substitution, engineering, admin, PPE) and verify effectiveness.
  4. Train workers on task-specific risks and safe operating procedures.
  5. Review and update assessments when products, processes, or SDSs change.

This approach answers key questions behind the difference between SDS and COSHH while embedding continuous improvement in chemical risk assessment.

Red 40 and Your Holiday Choices

Whether you're shopping for treats for your kids, choosing gifts, or indulging your sweet tooth, it's worth asking: is your candy cane Red 40-free?

Consumers are increasingly seeking out alternatives, opting for natural candy cane colours, simpler labels, or brands that disclose their food dye ingredients transparently.

Being informed about Red 40 health risks, its potential effects, and international regulation differences empowers you to make smarter choices, not just during the holidays, but year-round.

How Chemwatch Makes SDS vs COSHH Assessment Easy

Chemwatch provides an integrated solution that links supplier data with site-specific risk control, closing the loop between SDS vs COSHH assessment:

  • Extensive SDS library (150M+): Always-current supplier documents feed your assessments.
  • COSHH COBRA & Risk Modules: Generate clear, colour-coded chemical risk assessments in minutes by pulling the right data from SDSs.
  • Pre-populated fields: Automated data extraction speeds up authoring and reduces errors.
  • User-friendly reports: Task-based outputs support training, permits, and inspections.
  • Change alerts: Track SDS revisions and trigger reassessment to maintain COSHH compliance.

Chemwatch helps you move from hazard information to practical, documented control, supporting safer workplaces and robust chemical safety management. Contact Us today for SDS!

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