As UK REACH Deadlines for submission approach:

How Colour Synthesis Can Help – Sameness testing

UK REACH is a regulation that applies to the majority of chemical substances that are manufactured in or imported into Great Britain (GB) (England, Scotland, Wales). This can be:

  • A substance on its own
  • A substance in a mixture, for example ink or paint
  • A substance that makes up an ‘article’ – an object that is produced with a special shape, surface or design, for example a car, furniture or clothes.

REACH stands for registration evaluationauthorisation and restriction of chemicals.


Any GB-based legal entity continuing to import a substance into Great Britain (England, Scotland and Wales) at or above 1 tonne per year must submit a registration to HSE for that substance (unless an exemption applies). This obligation to register includes the import of substances from the EU.

UK REACH submission deadlines are fast approaching with final dates set for importing/manufacturing:

  • 1000 tonnes or more per year by October 2026
  • 100 tonnes or more per year by October 2028 and
  • 1 tonne or more per year by October 2030

It is essential that all businesses affected by REACH are compliant by the registration deadlines in order to continue trading in the UK and EU markets. Non-compliance can lead to significant disruptions in supply chains and hefty fines.

The initial phase of every submission is the chemical identification of the substance; this is where CSS can help.

Identification of Organic Substances and Sameness testing

At Colour Synthesis Solutions, we understand the challenges associated with REACH compliance, particularly Sameness testing. Our team of experts is equipped to guide you through the process, ensuring your substances meet the stringent requirements set by REACH.

Initial submissions for registration must identify the chemical component/s manufactured or imported into the UK.  Where registrations already exist, “sameness” testing must be run in order to show compliance with existing data.

Comprehensive Testing Services: We offer a full suite of analytical testing services to verify the chemical identity and composition of your substances. Our advanced laboratory capabilities include spectroscopy, chromatography, and mass spectrometry, ensuring accurate and reliable results.

CSS are experts in organic synthesis & analysis and are perfectly poised to not only run analysis of your organic substances but help to identify fully the chemical nature and concisely explain the technical details to conclude the structure of the entity submitted.

Our in-house analytical experts run spectroscopic analyses (e.g. NMR, IR) spectrometry (e.g Mass, ICP-MS, UPLC-MS) and purity analyses (e.g. HPLC, UPLC, GCMS, TLC) to determine the molecular formulae and chemical structures of your samples, their purity and impurity profiles. Supported by expert chemists that can help determine structural information from the data, we can provide surety in the identification of your chemical substances.

Access to extensive databases also allows us to search for relevant identifiers, such as CAS & EINECS numbers, IUPAC names, SMILES and other reference data, such as C.I. Numbers.

Timely and Efficient Solutions: With UK REACH deadlines approaching, timely compliance is more critical than ever. Colour Synthesis Solutions is committed to delivering prompt and efficient services, minimizing delays and helping you stay ahead of regulatory deadlines.


Compliance with EU and UK REACH regulations is essential for the safe and legal trade of chemicals in the EU and UK markets. Colour Synthesis Solutions offers the expertise, resources, and support you need to successfully navigate identification, purity & sameness testing and can support other REACH requirements to suit. By partnering with us, you can ensure your substances are correctly registered and compliant, avoiding costly disruptions to your importing/exporting and maintaining your market access.

Contact Colour Synthesis Solutions today to learn more about our services and how we can help you meet your REACH compliance goals. Let’s work together to ensure the safety, sustainability, and success of your chemical products in the market.

For more information on our services and how we can assist with your REACH compliance, visit our website or reach out to our expert team at