Company lists · Data refreshed September 2026
Top 25 Impurity testing services based in the United Kingdom
RevenueBase identified 151 impurity testing services headquartered in the United Kingdom as of September 2026 and tracks 30,472 professional contacts across them, including 10,347 with verified work emails. London is the largest hub.
This list covers impurity testing services headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest impurity testing services based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 23,155 contacts → | ||||
Indirect evidence “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 4,200 contacts → | ||||
Partial evidence “The Element Materials Technology Group is one of the world’s leading global providers of testing, inspection, and certification services for a diverse range of products…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 218 contacts → | ||||
Partial evidence “Founded in 2003, Normec i2 Analytical is one of Europe's leading environmental testing companies providing its customers a comprehensive range of analytical, monitoring and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 154 contacts → | ||||
Indirect evidence “Alex Stewart International is a leading worldwide supervision, inspection, and analysis.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 96 contacts → | ||||
Indirect evidence “Broughton is a global Contract Research Organisation (CRO) partnering with future-focused organisations to bring safe, high-quality products to market across the pharmaceutical…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 83 contacts → | ||||
Partial evidence “Microsearch Laboratories Ltd is a national food testing laboratory situated in Mytholmroyd at the heart of the beautiful Calder Valley.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 72 contacts → | ||||
Indirect evidence “Normec Latis Scientific is a market leading provider of laboratory services for a wide range of industries.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 71 contacts → | ||||
Indirect evidence “Excellence in Analytical Chemistry Since 1974 With 50 years of experience, Butterworth Laboratories remains a fully independent UK contract analytical service that provides…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 66 contacts → | ||||
Partial evidence “The Minton Treharne & Davies Group provide scientific consultancy, surveying and testing services to a worldwide client base from our offices in the UK, USA and Asia.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 65 contacts → | ||||
Partial evidence “Wickham Micro Ltd, A Cormica Lab, is a GMP / GLP compliant contract testing laboratory based in the UK.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 63 contacts → | ||||
Indirect evidence “CEMAS is an independent analytical laboratory with over 35 years’ experience supporting the agrochemical, biocide and life science sectors.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 61 contacts → | ||||
Partial evidence “One Scientific - A Tentamus Company is an independent food and water testing laboratory, UKAS accredited (No.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 52 contacts → | ||||
Partial evidence “Established in 2002, Chemtech Environmental, part of Celnor Group, has grown to become a leading supplier of chemical testing throughout the UK and Ireland.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 51 contacts → | ||||
Indirect evidence “Cawood is the UK’s leading independent scientific group, recognised for its technical capability and value-added service to customers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 48 contacts → | ||||
Indirect evidence “We believe in harnessing science for human good.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 44 contacts → | ||||
Indirect evidence “Your GLP Contract Research Organisation of Choice EPP specialises in analytical and research & development to help companies achieve product registration around the world with…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 42 contacts → | ||||
Indirect evidence “At Envirochem, we empower businesses to stay compliant, safe, and efficient with our industry-leading environmental risk mitigation services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 36 contacts → | ||||
Partial evidence “SGS Gas Analysis Services: Specialists in Gas Testing, Instrumentation, Validation and Design.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 32 contacts → | ||||
Indirect evidence “Envirolab provides laboratory services spanning a broad organic and inorganic portfolio.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 31 contacts → | ||||
Indirect evidence “For over 30 years, ASI has worked internationally with leading Clinical Research Organisations and across the pharmaceutical sector in drug discovery and pharmacovigilance…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 28 contacts → | ||||
Partial evidence “Experienced regulatory professional, with over 20 years’ specialist knowledge in microbiology and virology efficacy testing and claims support.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 28 contacts → | ||||
Partial evidence “Providing meticulous scientific testing services and support to the Food, Leisure, Agriculture, and Pharmaceutical industries for over a decade.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 26 contacts → | ||||
Partial evidence “Our goal is to make regulation and compliance testing simple.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 24 contacts → | ||||
Indirect evidence “Is your supply chain as transparent as your brand claims?” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 19 contacts → | ||||
Partial evidence “We are a privately owned UKAS accredited testing laboratory No.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: impurity testing services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names impurity testing services.
- Partial evidence
- Its own public description names part of impurity testing services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name impurity testing services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 151 impurity testing services based in the United Kingdom
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Impurity testing services based in the United Kingdom at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 151 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among impurity testing services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “impurity testing services”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names impurity testing services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among impurity testing services, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 10,347 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names impurity testing services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many impurity testing services are there based in the United Kingdom?
RevenueBase identified 151 impurity testing services headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Intertek, headquartered in London, tops this list with the largest team on record.
Which city has the most impurity testing services?
London leads with 6 headquartered companies, followed by Manchester (6) and Derby (4).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 10,347 verified decision-maker contacts tracked across these 151 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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