| Substance | Remark | CAS No. |
| Acephate | | 30560-19-1 |
| Acetaldehyde | | 75-07-0 |
| Acetamide | | 60-35-5 |
| Acetic acid | | 64-19-7 |
| Acetic anhydride | | 108-24-7 |
| Acetone | | 67-64-1 |
| Acetonitrile | | 75-05-8 |
| Acetophenone | | 98-86-2 |
| Acetylene | | 74-86-2 |
| O-Acetylsalicylic acid | | 50-78-2 |
| Acrolein | | 107-02-8 |
| Acrylamide | | 79-06-1 |
| Acrylic acid | | 79-10-7 |
| Acrylic acid polymer | | |
| Acrylic acid, 2,2,3,3,4,4,5,5,6,6,7,7,7-tridecafluoroheptyl ester | | 559-11-5 |
| 1 2 3 4 5 6 7 8 9 |