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Eliminate Classification Uncertainty Before Goods Leave Your Site
Conservative assumptions and inherited classifications create unnecessary regulatory risk and inflated transport costs. UN test data gives your teams the technical basis to classify correctly and defend it under audit.
- Replace assumption-based classification with evidence: establish through testing whether your material is an oxidising, flammable, or self-heating substance rather than through worst-case defaults.
- Prevent over-classification and the costs it creates: avoid unnecessary Class 4 or Class 5 designations that impose restrictive packaging and carrier requirements on materials that don’t meet the threshold.
- Deliver documentation that withstands regulatory scrutiny: third-party validated test data supports your dangerous goods declarations and gives your compliance function confidence in every shipment.
Sigma-HSE gives your EHS and logistics teams the data to classify correctly, compliantly, and cost-effectively by eliminating the risk that comes from undocumented assumptions.
Satisfy Auditors and Close Compliance Gaps Across Your Supply Chain
Regulators and auditors expect third-party validated evidence behind your dangerous goods classifications. Sigma-HSE gives your compliance teams the documented technical basis to satisfy inspections and close findings.
- Meet DSEAR, ADR, and UN Model Regulations obligations: test data proves you have properly characterised your materials, satisfying regulators who demand evidence-based classification over qualitative judgement
- Strengthen your audit documentation with third-party validation: give inspectors and competent authorities independently validated, laboratory-generated evidence they can act on directly.
- Support multi-site and cross-border compliance programmes: consistent data from a single laboratory gives your EHS leadership a reliable foundation across all sites and jurisdictions.
Sigma-HSE delivers the audit-ready documentation your compliance programme requires by reducing regulatory exposure and giving your EHS leadership confidence that every classification decision is defensible.
Reduce Transport Costs by Reclassifying Your Material Mixtures
Companies routinely assign mixtures the classification of their most hazardous constituent, regardless of whether the blend meets the threshold. Testing the mixture often proves it doesn’t, unlocking a lower classification and eliminating unnecessary cost.
- Challenge inherited classifications with evidence: a 50/50 mixture isn’t automatically an oxidiser. Testing establishes what the blend does and gives your teams the defensible basis to reclassify it correctly.
- Eliminate unnecessary packaging, labelling, and carrier costs: over-classified materials attract specialist packaging and restricted carriers. A lower classification removes those obligations by reducing cost on every future shipment.
- Recover value from new formulations from day one: testing at formulation stage stops a worst-case assumed classification taking root in your supply chain documentation and procurement contracts.
Sigma-HSE gives your EHS, R&D, and logistics teams the mixture testing data to challenge over-classification, recover unnecessary transport costs, and protect every new formulation from day one.
Understand the nature of materials in 3 simple steps
Obtaining and integrating transportation and classification data into your process has never been so easy.
Step 1: Contact Us
Step 2: Prepare & Ship
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Get the laboratory data your EHS and logistics teams need to classify dangerous goods correctly without delays, over-scoping, or unnecessary spend.
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Discover Our Range of UN Transportation & Classification Tests
Oxidising Solids — UN Test O.1
Self-Heating Solids — UN Test N.4
Water Reactive Solids — UN Test N.3
Readily Combustible Solids — UN Test N.1
Get in touch to find out how Sigma-HSE
can help you prevent fire and explosion incidents
Clarify your classifications.
Defend your compliance.
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Frequently asked questions
What is UN transportation testing and why is it required?
UN transportation testing determines how a material behaves under conditions relevant to its hazard classification, whether it oxidises, burns, or self-heats. Regulators require this data to ensure dangerous goods are correctly classified before they enter the supply chain, protecting carriers, handlers, and the public from foreseeable risk.
How do I know which UN tests my materials require?
The tests required depend on the nature of your materials and their likely hazard profile. If your substance contains oxidising, flammable, or self-heating constituents, or if you are transporting a mixture containing such materials, UN Tests O.1, N.1, and N.4 are the most likely starting points. The right approach is a conversation with one of our experts before committing to a testing scope.
How quickly can Sigma-HSE deliver UN transportation testing results?
We deliver accredited classification reports within 7 to 10 working days of receiving your samples, the fastest turnaround available in the UK. For time-critical projects, contact us to discuss your deadline and we will confirm feasibility as part of your bespoke quote.
Can Sigma-HSE support both testing and compliance documentation from a single engagement?
Yes. Sigma-HSE operates as a fully integrated process safety partner. Beyond generating your classification data, our experts can advise on how results integrate into your dangerous goods documentation, DSEAR obligations, and audit preparation, giving your EHS and logistics teams a single point of accountability from testing through to compliance.
What happens if our test results confirm a hazardous classification?
A confirmed classification is not the end of the process, it is the beginning of a managed compliance position. Our experts will walk you through the implications for packaging, labelling, carrier selection, and documentation, and where applicable identify any volume-based exemptions that may reduce the operational impact. You will leave with a clear picture of your obligations and a practical path to meeting them.