| No. | CAS # | Product Names | Molecular Formula |
| 1 | 136470-78-5 | Abacavir | C14H18N6O |
| 2 | 71751-41-2 | Abamectin | C48H72O14；C47H70O14 |
| 3 | 14375-45-2 | Abscisic acid | C15H20O4 |
| 4 | 9003-56-9 | ABS | |
| 5 | 120-78-5 | Accelerator (DM) | C14H8N2S4 |
| 6 | 74811-65-7 | ACDISOL | |
| 7 | 89796-99-6 | Aceclofenac | C16H13Cl2NO4 |
| 8 | 2490-97-3 | Aceglutamide | C7H12N2O4 |
| 9 | 82-86-0 | Acenaphthenequinone | C12H6O2 |
| 10 | 83-32-9 | Acenaphthene | C12H10 |
| 11 | 30560-19-1 | acephate | C4H10NO3PS |
| 12 | 75-07-0 | Acetaldehyde | C2H4O |
| 13 | 60-35-5 | Acetamide | C2H5NO |
| 14 | 135410-20-7 | Acetamiprid | C10H11ClN4 |
| 15 | 103-84-4 | Acetanilide | C8H9NO |
| 16 | 59-66-5 | acetazolamide | C4H6N4O3S2 |
| 17 | 6131-90-4 | Acetic acid, sodium salt trihydrate | C2H3NaO2.3H2O |
| 18 | 108-24-7 | acetic anhydride | C4H6O3 |
| 19 | 102-01-2 | acetoacetanilide | C10H11NO2 |
| 20 | 34256-82-1 | Acetochlor | C14H20ClNO2 |
| 21 | 546-88-3 | Acetohydroxamic acid | C2H5NO2 |
| 22 | 75-86-5 | Acetone cyanohydrin | C4H7NO |
| 23 | 127-06-0 | Acetone oxime | C3H7NO |
| 24 | 1752-30-3 | Acetone thiosemicarbazone | C4H9N3S |
| 25 | 77-76-9 | acetone-dimethyl acetal | C5H12O2 |
| 26 | 67-64-1 | Acetone | C3H6O |
| 27 | 75-05-8 | Acetonitrile | C2H3N |
| 28 | 98-86-2 | Acetophenone | C8H8O |
| 29 | 13831-30-6 | Acetoxyacetic acid | C4H6O4 |
| 30 | 13831-31-7 | Acetoxyacetyl chloride | C4H5ClO3 |
| 31 | 85-36-9 | Acetrizoic acid | C9H6I3NO3 |
| 32 | 32388-55-9 | Acetyl cedrene | C17H26O |
| 33 | 75-36-5 | Acetyl chloride | C2H3ClO |
| 34 | 928-04-1 | Acetylenedicarboxylic acid monopotassium salt | C4HKO4 |
| 35 | 74-86-2 | Acetylene | C2H2 |
| 36 | 22047-25-2 | Acetylpyrazine | C6H6N2O |
| 37 | 14510-37-3 | Acetyltropylic chloride | C11H11ClO3 |
| 38 | 69657-51-8 | Aciclovir sodium | C8H11N5NaO3 |
| 39 | 8005-03-6 | Acid Black 2 | |
| 40 | 6397-02-0 | Acid Blue 129 | C23H19N2NaO5S |
| 41 | 860-22-0 | Acid Blue 74 | C16H8N2Na2O8S2 |
| 42 | 6104-59-2 | Acid Blue 83 | C45H44N3NaO7S2 |
| 43 | 6104-58-1 | Acid Blue 90 | C47H48N3NaO7S2 |
| 44 | 28983-56-4 | Acid Blue 93 | C37H27N3Na2O9S3 |
| 45 | 000000-00-0 | Acid Dyes | |
| 46 | 19381-50-1 | Acid Green 1 | C30H15FeN3Na3O15S3 |
| 47 | 3087-16-9 | Acid Green 50 | C27H25N2NaO7S2 |
| 48 | 65996-63-6 | Acid modified starch | |
| 49 | 6358-57-2 | Acid Red 111 | C37H28N4Na2O10S3 |
| 50 | 2611-82-7 | Acid Red 18 | C20H11N2Na3O10S3 |