| 3,3-Tetramethyleneglutaricanhydride | 5662-95-3 | Intermediates | 1 |
| 3,3-Tetramethyleneglutarimide | 1075-89-4 | Intermediates | 1 |
| 3,4-(Methylenedioxyphenyl)Ethylamine (Hpa) | 1484-85-1 | Intermediates | 1 |
| 3,4-Di-Ethoxy Phenyl Acetic Acid | 38464-04-9 | Intermediates | 1 |
| 3,4-Di-Ethoxy Phenyl Ethyl Amine | 61381-04-2 | Intermediates | 1 |
| 3,4-Dimethoxy Phenyl Acetic Acid | 93-40-3 | Intermediates | 1 |
| 3,4-Dimethoxy benzaldehyde | 120-14-9 | | 1 |
| 3,5-Dichlorobenzoyl Chloride | 2905-62-6 | Intermediates | 1 |
| 3,5-Difluorobenzyl Bromide | 141776-91-2 | Intermediates | 1 |
| 3,7-Dichloroimipramine Hydrochloride | 577-11-7 | Tricyclic antidepressants | 1 |
| 3-Aminophthalic Acid | 5434-20-8 | Intermediates | 1 |
| 3-Aminopiperidine-2,6-Dione Hydrochloride | 24666-56-6 | Intermediates | 1 |
| 3-Bromo-4-Methylpyridine | 3430-22-6 | Intermediates | 1 |
| 3-Butyn-1-Ol | 927-74-2 | Intermediates | 1 |
| 3-Chloro-1-Phenylpropan-1-Ol | 18776-12-0 | Intermediates | 1 |
| 3-Chloro-1-Phenylpropan-1-One | 936-59-4 | Intermediates | 1 |
| 3-Chloro-4-Nitrophenol | 491-11-2 | Intermediates | 1 |
| 3-Chloroiminodibenzyl | 1285572-51-1 | Sensitizers in photodynamic and radiotherapy | 1 |
| 3-Cyanobenzaldehyde | 24964-64-5 | Intermediates | 1 |
| 3-Ethyl-4-Methyl-2-Oxo-N-Phenethyl-2H-Pyrrole-1(5H)- Carboxamide | 247098-18-6 | Intermediates | 1 |
| 3-Ethyl-4-Methyl-3-Pyrroline-2-One [Empo] | 766-36-9 | Intermediates | 1 |
| 3-Fluoro-4-Nitrobenzoic Acid | 403-21-4 | Intermediates | 1 |
| 3-Hydroxy-4-nitrobenzoic acid | 619-14-7 | Diagnostic agents | 1 |
| 3-Iodooxetane | 26272-85-5 | | 1 |
| 3-Isochromanone | 4385-35-7 | Intermediates | 1 |
| 3-Methoxy-4-Methylbenzonitrile | 3556-60-3 | Intermediates | 1 |
| 3-Methoxyphenylacetonitrile | 19924-43-7 | Intermediates | 1 |
| 3-Tert-Butyl-6-Ethylsulfanyl-1H-1,3,5-Triazine-2,4-Dione | 1360105-53-8 | Intermediates | 1 |
| 4 Chloro Ortho Phenylene Diamine | 95-83-0 | Dermatics | 1 |
| 4 Nitro Ortho Phenylene Diamine | 99-56-9 | Dermatics | 1 |
| 4-(1H-Pyrazol-4-Yl)-7-[[2-(Trimethylsilyl)Ethoxy]Methyl]-7H-Pyrrolo[2,3-D]Pyrimidine | 941685-27-4 | Intermediates | 1 |
| 4-(2-(3-Ethyl-4-Methyl-2-Oxo-2,5-Dihydro-1H-Pyrrole-1- Carboxamido)Ethyl)Benzene-1-Sulfonyl Chloride | 119043-16-2 | Intermediates | 1 |
| 4-(3-Chloro-4-Nitrophenoxy)-7-Methoxy-6-Quinolinecarboxamide | 2023825-93-4 | Intermediates | 1 |
| 4-(4-Fluorobenzoyl)Butyric Acid | 149437-76-3 | Intermediates | 1 |
| 4-(4-Phenylbutoxy)Benzoic Acid | 30131-16-9 | Intermediates | 1 |
| 4-(Ethylaminomethyl)Pyridine | 33403-97-3 | Intermediates | 1 |
| 4-(aminomethyl)-3-cyclohexene -1-carboxylic acid | 330838-52-3 | | 1 |
| 4-[(3-Bromo-4-Fluorophenyl)Methyl]-1(2H)-Phthalazinone | 1062292-60-7 | Intermediates | 1 |
| 4-[(5-Bromo-2-Chlorophenyl)Methyl]Phenol | 864070-18-8 | Intermediates | 1 |
| 4-[[(4-Fluorophenyl)Imino]Methyl]-Phenol | 3382-63-6 | Intermediates | 1 |