| 1 | 55-03-7 | 甲状腺素钠 | oroxine | C15H10I4NNaO4 | | |
| 2 | 55-03-8 | 左甲状腺素钠 | levothyroxine sodium | C15H12I4NNaO4 | 激素;氨基酸;生物化学;医用原料;生化试剂;医药中间体;生物化学品;氨基酸衍生物;医药原料和中间体;相关类别：医药原料和中间体 | |
| 3 | 55-06-1 | 碘甲腺氨酸钠 | 3,3',5-Triiodo-L-thyronine, sodium salt | C15H11I3NNaO4 | 盐;氨基酸;氨基酸类;医药原料;化学试剂;科研试剂;化工原料;医药中间体;医药化工类;通用生化试 | |
| 4 | 55-16-3 | (-)-盐酸东莨菪碱 | (-)-scopolamine hydrochloride | C17H22ClNO4 | 对照品;中草药成分;植物提取物;分析标准品;原料中间体;农业和环境标准品;对照品-中药对照品 | |
| 5 | 55-18-5 | 二乙基亚硝胺 | Diethylnirtosamine | C4H10N2O | 亚硝胺类;分析标准品 | |
| 6 | 55-21-0 | 苯甲酰胺 | Benzamide | C7H7NO | 酰胺;标准品;氮化合物;有机砌块;生化试剂;化学试剂;植物提取物;酰胺化合物;其他生化试剂;有机铝化合物 | 医药;染料 |
| 7 | 55-22-1 | 异烟酸 | isonicotinic acid | C6H5NO2 | 吡啶;原料;化学;中间体;医药原料;通用试剂;维生素类;杂环砌块;化工原料;化工材料 | 医药中间体 |
| 8 | 55-27-6 | DL-去甲肾上腺素盐酸盐 | dl-noradrenaline hydrochloride | C8H12ClNO3 | 合成;原料药;医用原料;医药原料;医药原料药;杂质对照品;临床检测标准物质 | |
| 9 | 55-31-2 | 盐酸肾上腺素 | L-Epinephrine Hydrochloride | C9H14ClNO3 | 原料;医药类;原料药;其他类;对照品;医用原料;药用原料;化学原药;医药原料;化学原料 | |
| 10 | 55-34-5 | 4-hydroxyaminopropiophenone | 4-hydroxyaminopropiophenone | C9H11NO2 | | |
| 11 | 55-36-7 | 组胺盐酸盐 | Histamine, monohydrochloride | C5H10ClN3 | | |
| 12 | 55-37-8 | BAYER9013 | BAYER9013 | C11H17O3PS2 | | |
| 13 | 55-38-9 | 倍硫磷 | fenthion | C10H15O3PS2 | 农药;杀虫剂;中间体;农药原料;化工中间体;分析标准品;杀虫（螨）剂;有机磷杀虫剂;有机氯杀虫剂;农残、兽药及化肥类 | 杀虫剂 |
| 14 | 55-40-3 | 消旋-a-甲基多巴 | rac α-Methyl DOPA | C10H13NO4 | | |
| 15 | 55-43-6 | N-(2-氯乙基)二苄胺盐酸盐 | Dibenamine Hydrochloride | C16H19Cl2N | 胺盐 | |
| 16 | 55-45-8 | 4-[N-(3-氯苯基)氨基甲酰氧]-2-丁炔基三甲基氯化铵 | 4-(N-[3-CHLOROPHENYL]-CARBAMOYLOXY)-2-BUTYNYLTRIMETHYLAMMONIUM CHLORIDE | C14H18Cl2N2O2 | | |
| 17 | 55-48-1 | 硫酸阿托品 | atropine sulphate | 2C17H23NO3.H2O4S | 原料;原料药;中间体;对照品;添加剂;其他类;医用原料;医药原料;化工原料;医药兽药 | 农药 |
| 18 | 55-51-6 | N,N-双(2-氯乙基)苯甲胺 | N,N-Bis(2-chloroethyl)benzenemethanamine | C11H15Cl2N | | |
| 19 | 55-52-7 | 苯异丙肼 | ALPHA-BROMOISOBUTYRIC ACID | C9H14N2 | | |
| 20 | 55-55-0 | 对甲基氨基酚,硫酸盐 | 4-Methylaminophenol sulfate | C7H11NO5S | 芳烃;苯酚;中间体;标准品;其他原料;生化试剂;分析试剂;化工原料;医药原料;有机原料 | |
| 21 | 55-56-1 | 洗必泰 | chlorhexidine | C22H30Cl2N10 | 胍;添;原料;中间体;原料药;通用试剂;无机化工;医药原料;医药中间体;分析标准品 | |
| 22 | 55-57-2 | 1-苯基双胍盐酸盐 | 1-phenylbiguanide hydrochloride | C8H12ClN5 | 有机化学 | |
| 23 | 55-59-4 | 3,4-二甲氧基-DL-苯丙氨酸 | (S)-2-AMINO-3-(3,4-DIMETHOXY-PHENYL)-PROPIONIC ACID | C11H15NO4 | | |
| 24 | 55-63-0 | TrinitroglyCERAMICS-AEin | TrinitroglyCERAMICS-AEin | C3H5N3O9 | | |
| 25 | 55-63-0 | 硝化甘油 | Nitroglycerin | C3H5N3O9 | | |
| 26 | 55-65-2 | 依斯美林 | guanethidine | C10H22N4 | | |
| 27 | 55-68-5 | 硝酸苯汞 | phenylmercury nitrate | C6H5HgNO3 | 有机金属试剂 | |
| 28 | 55-70-5 | 2-Bromobiphenyl | 2-Bromobiphenyl | | | |
| 29 | 55-70-9 | N',N'-Dimethyl-N-phenyl-1,2-propanediamine | N',N'-Dimethyl-N-phenyl-1,2-propanediamine | C11H18N2 | | |
| 30 | 55-71-0 | N',N'-Dimethyl-N-phenyl-1,2-butanediamine | N',N'-Dimethyl-N-phenyl-1,2-butanediamine | C12H20N2 | | |
| 31 | 55-73-2 | 倍他尼定 | Betanidine | C10H15N3 | | |
| 32 | 55-80-1 | 3'-甲基-4-二甲氨基偶氮苯 | 3-Methyl-4-(Dimethylamino)Azobenzene | C15H17N3 | | |
| 33 | 55-81-2 | 对甲氧基苯乙胺 | 2-(4-Methoxyphenyl)ethylamine | C9H13NO | 胺;中间体;通用试剂;有机砌块;有机原料;化工原料;医药中间体 | |
| 34 | 55-85-6 | 二甲氨基乙酰肼 | DIMETHYLAMINO-ACETIC ACID HYDRAZIDE | C4H11N3O | | |
| 35 | 55-86-7 | 盐酸氮芥 | mechlorethamine hydrochloride | C5H12Cl3N | 胺盐;原料;原料药;医药原料;通用试剂;抗肿瘤类;科研试剂;有机砌块;化工原料;抗菌原料药 | 医药 |
| 36 | 55-88-9 | 反式-4-羟基-2-辛烯醛 | 2-Octenal, 4-hydroxy-, (E)- | C8H14O2 | | |
| 37 | 55-89-0 | Thimidine | Thimidine | | | |
| 38 | 55-91-4 | 双(1-甲基乙基)氟磷酸酯 | DIISOPROPYL FLUOROPHOSPHATE | C6H14FO3P | | |
| 39 | 55-92-5 | (2-HYDROXYPROPYL)TRIMETHYLAMMONIUMACETATE | (2-HYDROXYPROPYL)TRIMETHYLAMMONIUMACETATE | C8H18NO2 | | |
| 40 | 55-93-6 | 化合物 T31495 | dimethylmyleran | C8H18O6S2 | | |
| 41 | 55-94-7 | suxamethonium bromide | suxamethonium bromide | C14H30Br2N2O4 | | |
| 42 | 55-95-8 | 1,2-Ethanediyl Bismethanethiosulfonate | 1,2-Ethanediyl Bismethanethiosulfonate | C4H10O4S4 | | |
| 43 | 55-96-9 | 1,3-Propanediyl Bismethanethiosulfonate | 1,3-Propanediyl Bismethanethiosulfonate | C5H12O4S4 | | |
| 44 | 55-97-0 | 六甲溴铵 | Hexamethonium bromide | C12H30Br2N2 | 催化剂;中间体;化工原料;化工中间体;小分子抑制剂;有机化工原料;精细化工原料 | |
| 45 | 55-98-1 | 白消安 | Busulfan | C6H14O6S2 | 酯;原料;中间体;原料药;化合物;医用原料;医药原料;细胞生物学;小分子抑制剂;医药 抗肿瘤 | 医药 |
| 46 | 55-99-2 | 1,4-Butanediyl Bismethanethiosulfonate | 1,4-Butanediyl Bismethanethiosulfonate | C6H14O4S4 | | |