Company lists · Data refreshed September 2026
Top 25 Impurity testing services worldwide
RevenueBase identified 5,369 impurity testing services worldwide as of September 2026 and tracks 229,699 professional contacts across them, including 58,056 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers impurity testing services worldwide, 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. Country and city lists for impurity testing services follow the table.
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 worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 60,606 contacts → | ||||
Partial evidence “SGS is the world’s leading Testing, Inspection and Certification company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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. | |||||
| 3 | 11,653 contacts → | ||||
Indirect evidence “Since 1987, Eurofins has grown from one laboratory in Nantes, France to over staff across a network of independent companies in 59 countries, operating over 950 laboratories.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 9,234 contacts → | ||||
Partial evidence “A global leader in testing, ALS provides comprehensive testing solutions to clients in a wide range of industries around the world.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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. | |||||
| 6 | 3,447 contacts → | ||||
Partial evidence “The AmSpec Group has been relied upon in the testing, inspection, and certification (TIC) sector for several decades.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 2,274 contacts → | ||||
Partial evidence “Cotecna is a leading provider of testing, inspection and certification services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 2,228 contacts → | ||||
Indirect evidence “Pace® Science and Technology Company makes the world a safer, healthier place.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,678 contacts → | ||||
Indirect evidence “Control Union is a private international company that has been serving the commodity market since 1920.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1,638 contacts → | ||||
Indirect evidence “Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,549 contacts → | ||||
Partial evidence “QIMA is more than a testing, inspection, certification, and compliance company: We are on a mission to offer clients smart solutions to make products consumers can trust.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,239 contacts → | ||||
Indirect evidence “Founded in 1984 with headquarters in Hyderabad, India, VIMTA LABS LTD.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,071 contacts → | ||||
Indirect evidence “Since 1979, AGAT Laboratories has been empowering clients with trustworthy data and unmatched client relations.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 775 contacts → | ||||
Partial evidence “Nelson Labs is a global leader in microbiological and analytical chemistry testing and advisory services for the medical device and pharmaceutical industries.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 761 contacts → | ||||
Indirect evidence “AGQ Labs is one of the world's leading analytic laboratories and technological centers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 738 contacts → | ||||
Partial evidence “We are committed to strengthening safety systems with the most reliable Testing and Auditing Solutions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 719 contacts → | ||||
Partial evidence “As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 690 contacts → | ||||
Partial evidence “Founded in 1990, Aegis Sciences Corporation is a forensic toxicology and healthcare laboratory that provides science-driven drug testing and consulting services based in…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 683 contacts → | ||||
Indirect evidence “Solvias helps innovative companies advance their path to commercialization with CMC analytical solutions powered by deep scientific expertise and a relentless focus on our…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 665 contacts → | ||||
Partial evidence “An internationally leading independent third-party testing, inspection, certification, training, and consulting organization, TÜV Rheinland has over 150 years of experience.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 651 contacts → | ||||
Partial evidence “IEH is an international lab & consulting services company, offering a comprehensive portfolio of lab testing services and consultation across multiple industries.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 642 contacts → | ||||
Indirect evidence “Somos líderes mundiales en inspección, verificación, análisis y certificación.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 632 contacts → | ||||
Indirect evidence “When it comes to understanding the physical structure, chemical properties and performance of advanced materials and integrated circuitry, no other scientific services company…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 596 contacts → | ||||
Indirect evidence “Maxxam is a leading North American provider of analytical services and solutions to the energy, environmental, food, industrial hygiene and DNA industries.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 594 contacts → | ||||
Indirect evidence “Saybolt is the trade name for Core Laboratories' laboratory analyses, independent field inspections, and monitoring and verification programs for crude oil and its derived…” 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 5,369 impurity testing services worldwide
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Impurity testing services worldwide at a glance
As of Sep 20, 2026Companies by employee count
Email recency is reported on each country list linked below.
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.
- Coverage
- Every country. Country and city lists for impurity testing services are linked below.
- What qualifies
- Companies worldwide 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.
- 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, 58,056 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.
Impurity testing services by location
23 lists · largest firstEvery Impurity testing services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Impurity testing services based in the United States984
- Impurity testing services based in India510
- Impurity testing services based in Brazil470
- Impurity testing services based in Italy359
- Impurity testing services based in Germany213
- Impurity testing services based in France170
- Impurity testing services based in Spain154
- Impurity testing services based in the United Kingdom151
- Impurity testing services based in Canada108
- Impurity testing services based in Colombia104
- Impurity testing services based in Mexico104
- Impurity testing services based in Türkiye103
- Impurity testing services based in Argentina95
- Impurity testing services based in South Africa76
- Impurity testing services based in Indonesia70
- Impurity testing services based in Australia64
- Impurity testing services based in the Netherlands53
- Impurity testing services based in Chile52
- Impurity testing services based in Poland47
- Impurity testing services based in Greece41
- Impurity testing services based in Switzerland38
- Impurity testing services based in Belgium27
Cities
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 worldwide?
RevenueBase identified 5,369 impurity testing services worldwide 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?
SGS, headquartered in Baar, tops this list with the largest team on record.
Which country has the most impurity testing services?
The United States leads with 984 companies, followed by India (510) and Brazil (470). Every impurity testing services list by country and city is linked on this page.
Which city has the most impurity testing services?
Sao Paulo leads with 48 headquartered companies, followed by Hyderabad (44) and Ahmedabad (31).
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 58,056 verified decision-maker contacts tracked across these 5,369 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.