| 2-amino-phenolo-4-sulphonamid |
| ABS acid |
| Acesulfame K |
| Acetic acid |
| Acetic anhydride |
| Acetone |
| Acrylamide |
| Acrylic acid |
| Acrylonitrile |
| Activated carbon |
| Adipic acid |
| Aluminium chloride |
| Aluminium hydroxide |
| Amidosulfuric acid |
| Aminoacetic acid |
| Ammonium bicarbonate |
| Ammonium chloride |
| Ammonium hydrofluoride |
| Ammonium molybdate |
| Ammonium myristate |
| Ammonium persulfate |
| Ammonium sulfate |
| Aniline |
| Antimony trioxide |
| Apple acid |
| Arachis oil |
| Arsenic trioxide |
| Ascorbic acid |
| Aspartame |
|