- American Association for Laboratory Accreditation (A2LA), USA
- American National Standards Institute (ANSI)
- American Society for Testing Materials (ASTM)
- AOAC International
- Asia Pacific Laboratory Accreditation Cooperation (APLAC)
- Asia-Pacific Economic Cooperation (APEC)
- Bhabha Atomic Research Centre (BARC), India
- British Standards Institution (BSI)
- Bureau of Indian Standards (BIS)
- COFRAC, France
- Co-Operation on International Traceability in Analytical Chemistry (CITAC)
- DAR, Germany
- Department of Science & Technology (DST), India
- Dutch Council for Accreditation (RvA)
- EURACHEM
- EUROLAB
- European Committee for Standardization (CEN)
- European Cooperation for Accreditation (EA)
- German Institute for Standardization (DIN)
- Hong Kong Accreditation Scheme (HKAS)
- InterAmerican Accreditation Cooperation (IAAC)
- International Accreditation New Zealand (IANZ)
- International Bureau of Weights and Measures (BIPM)
- International Electrotechnical Commission (IEC)
- International Laboratory Accreditation Co-operation (ILAC)
- International Organization for Standardization (ISO)
- International Organization of Legal Metrology (OIML)
- Japan National Laboratory Accreditation (JNLA)
- Joint accreditation system of Australia and New Zealand (JAS-ANZ)
- National Analytical Reference Laboratory, Australia (NARL)
- National Association for Proficiency Testing (NAPT)
- National Association of Testing Authorities, Australia (NATA)
- National Chemical Laboratory (NCL), India
- National Institute of Standards and Technology (NIST)
- National Physical Laboratory (NPL), India
- National Voluntary Laboratory Accreditation Program (NVLAP)
- Organisation for Economic Co-operation and Development (OECD)
- Pacific Accreditation Cooperation (PAC)
- Quality Council of India (QCI)
- Singapore Accreditation Council (SAC-SINGLAS)
- Standards Australia
- Swedish Board for Accreditation and Conformity Assessment (SWEDAC)
- Swiss Accreditation Service (SAS)
- United Kingdom Accreditation Service (UKAS)
- World Trade Organisation (WTO)
