Affiliations with the Letter A
- Al Quds University -- Israel
- Al-Balqa Applied University Jordan -- Jordan
- Albert Szent-Györgyi University Medical School -- Hungary
- Alcatel Telecommunications -- United States
- Alchemie Research Centre -- India
- Alfred University -- United States
- Allama Iqbal Medical College -- Pakistan
- Alnylam Pharmaceuticals -- United States
- Altana Pharm AG -- Germany
- AMDA Industries, Inc. -- United States
- American Chemical Society -- United States
- American Oil Chemists Society -- United States
- American University -- United States
- Anadolu University -- Turkey
- Anatech Instruments, Ltd. -- South Africa
- Ankara Universitesi -- Turkey
- AOAC International -- United States
- Aoyama-Gakuin University -- Japan
- Argonne National Laboratory -- United States
- Ariel University Center of Samaria -- Israel
- Aristotle University -- Greece
- Arizona State University -- United States
- Arkema -- France
- ARPA Veneto -- Italy
- Ashtown Food Research Centre -- Ireland
- Asociacion Quimica Argentina -- Argentina
- Association of Greek Chemists -- Greece
- Asta Medica AG -- Germany
- Aston University -- United Kingdom
- AstraZeneca -- Sweden