| 序号 | 中文名称 | 英文名称 |
|---|---|---|
| 201 | 4-氨基水杨酸及其盐类 | 4-Aminosalicylic acid (CAS No. 65-49-6) and its salts |
| 202 | 4-苄氧基苯酚; 4-乙氧基苯酚 | 4-Benzyloxyphenol and 4-ethoxyphenol (CAS No. 103-16-2 / CAS No. 622-62-8) |
| 203 | 4-氯-2-氨基苯酚 | 4-Chloro-2-Aminophenol (CAS No. 95-85-2) |
| 204 | 4-二乙基氨基邻甲苯胺及其盐类 | 4-Diethylamino-o-toluidine and its salts (CAS No. 148-71-0 / CAS No. 24828-38-4 / CAS No. 2051-79-8) |
| 205 | 4-乙氧基间苯二胺及其盐类 | 4-Ethoxy-m-phenylenediamine (CAS No. 5862-77-1) and its salts |
| 206 | 4-乙氨基-3-硝基苯甲酸 (N-乙基-3-硝基 PABA)及其盐类 | 4-Ethylamino-3-nitrobenzoic acid (N-Ethyl-3-Nitro PABA) (CAS No. 2788-74-1) and its salts |
| 207 | (4-肼基苯基)-N-甲基甲烷磺酰胺盐酸盐 | (4-Hydrazinophenyl)-N-methylmethanesulfonamide hydrochloride (CAS No. 81880-96-8) |
| 208 | 4-羟基吲哚 | 4-Hydroxyindole (CAS No. 2380-94-1) |