| 1 | 5500-21-0 | Cyclopropyl cyanide | C4H5N | 67.09 | | Miscible with water. |
| 2 | 5500-65-2 | 2-Pyrrolidinone, 4-methyl-3-phenyl- | C11H13NO | 175.23 | | |
| 3 | 5500-76-5 | 8-[2-(4-Fluorophenyl)ethyl]-1-oxa-3,8-diazaspiro[4.5]decan-2-one | C15H19FN2O2 | 278.32 | | |
| 4 | 55000-14-1 | 2-[(2-methylprop-2-en-1-yl)oxy]aniline | C10H13NO | 163.22 | 80-80.5 °C | |
| 5 | 55000-16-3 | 3-(2-Aminophenyl)propanenitrile | C9H10N2 | 146.1891 | | |
| 6 | 55000-32-3 | α,3-Bis(acetyloxy)benzeneacetic acid methyl ester | C13H14O6 | 266.25 | | |
| 7 | 55000-33-4 | α,4-Bis(acetyloxy)benzeneacetic acid methyl ester | C13H14O6 | 266.25 | | |
| 8 | 55000-34-5 | 4-Methoxy-α-(trimethylsiloxy)benzeneacetic acid methyl ester | C13H20O4Si | 268.381 | | |
| 9 | 55000-35-6 | [(p-Chlorophenyl)sulfonyl]pyridinioamine anion | C11H10ClN2O2S+ | 269.7273 | | |
| 10 | 55000-36-7 | N,N'-Bis(2,5-dihydro-5-oxofuran-2-ylidene)-1,4-benzenediamine | C14H8N2O4 | 268.22 | | |
| 11 | 55000-37-8 | 5-Ethyl-5-hexyl-1,3-dimethyl-2,4,6(1H,3H,5H)-pyrimidinetrione | C14H24N2O3 | 268.35 | | |
| 12 | 55000-38-9 | N-(3-Nitrophenyl)-3-phenylpropenamide | C15H12N2O3 | 268.27 | | |
| 13 | 55000-39-0 | 5-Ethoxy-1-benzyl-1H-benzimidazol-4-ol | C16H16N2O2 | 268.31 | | |
| 14 | 55000-40-3 | 2-Butyl-6-phenylbenzothiazole | C17H17NS | 267.39 | | |
| 15 | 55000-41-4 | 11-Hexadecynoic acid methyl ester | C17H30O2 | 266.42 | | |
| 16 | 55000-42-5 | 11-Hexadecenoic acid methyl ester | C17H32O2 | 268.43 | | |
| 17 | 55000-43-6 | 2,4-Dimethylbenzoic acid (2,4-dimethylphenyl)methyl ester | C18H20O2 | 268.35 | | |
| 18 | 55000-44-7 | 2,4-Dimethylbenzoic acid (2,5-dimethylphenyl)methyl ester | C18H20O2 | 268.35 | | |
| 19 | 55000-45-8 | 2,4-Dimethylbenzoic acid (3,5-dimethylphenyl)methyl ester | C18H20O2 | 268.35 | | |
| 20 | 55000-46-9 | 3,5-Dimethylbenzoic acid (2,4-dimethylphenyl)methyl ester | C18H20O2 | 268.35 | | |
| 21 | 55000-47-0 | 3,5-Dimethylbenzoic acid (3,5-dimethylphenyl)methyl ester | C18H20O2 | 268.35 | | |
| 22 | 55000-48-1 | 2,5-Dimethylbenzoic acid (2,4-dimethylphenyl)methyl ester | C18H20O2 | 268.35 | | |
| 23 | 55000-49-2 | 2,5-Dimethylbenzoic acid (2,5-dimethylphenyl)methyl ester | C18H20O2 | 268.35 | | |
| 24 | 55000-50-5 | 5,6,7,8-Tetradehydro-3-methoxy-17-methylmorphinan | C18H21NO | 267.37 | | |
| 25 | 55000-51-6 | 6,7,8,14-Tetradehydro-3-methoxy-17-methylmorphinan | C18H21NO | 267.37 | | |
| 26 | 55000-52-7 | 2,6,10-Trimethylhexadecane | C19H40 | 268.52 | | |
| 27 | 55000-53-8 | 1,4-Dimethyl-5-octylnaphthalene | C20H28 | 268.44 | | |
| 28 | 55000-54-9 | 2,6-Dimethyl-3-octylnaphthalene | C20H28 | 268.44 | | |
| 29 | 55000-55-0 | 7-Butyl-1-hexylnaphthalene | C20H28 | 268.44 | | |
| 30 | 55000-56-1 | 2-Butyl-3-hexylnaphthalene | C20H28 | 268.44 | | |
| 31 | 55000-57-2 | 2-Deoxy-2-fluoro-α-D-arabinopyranose triacetate | C11H15FO7 | 278.23 | | |
| 32 | 55000-99-2 | Propanedioic acid, 2-(1-methylethyl)-2-(phenylmethyl)-, 1,3-diethyl ester | C17H24O4 | 292.37 | | |
| 33 | 55001-09-7 | Methyl 3 - (2-methoxyphenyl) propionate | C11H14O3 | 194.23 | | |
| 34 | 55003-02-6 | Phosphorodihydrazidothioic acid, O-phenyl ester (9CI) | C6H11N4OPS | 218.22 | | |
| 35 | 55003-25-3 | 4-Thiouridine 2',3',5'-Triacetate | C15H18N2O8S | 386.38 | | |
| 36 | 55003-40-2 | 1-fluoro-4-(triethoxymethyl)benzene | C13H19FO3 | 242.2865632 | | |
| 37 | 55003-81-1 | 2-(2,6-dioxopiperidin-3-yl)-5-nitroisoindoline-1,3-dione | C13H9N3O6 | 303.22706 | | |
| 38 | 55003-96-8 | BIS(1H,1H,2H,2H-PERFLUOROOCTYL)MALEATE | C20H10F26O4 | 808.25 | | |
| 39 | 55004-22-3 | 2-dichlorophosphorylethylbenzene | C8H9Cl2OP | 223.04 | | |
| 40 | 55004-59-6 | ETHYL 2-BROMO-2-PHENYLPROPANOATE | C11H13BrO2 | 257.12 | | |
| 41 | 55004-75-6 | 4-HYDROXY-7,8-DIMETHYLCOUMARIN | C11H10O3 | 190.2 | | |
| 42 | 55004-76-7 | 6,8-DIMETHYL-4-HYDROXYCOUMARIN | C11H10O3 | 190.2 | 254-260 °C(Solv: methanol (67-56-1); water (7732-18-5)) | |
| 43 | 55004-77-8 | 4-Hydroxy-6 7-Dimethylcoumarin | C11H10O3 | 190.197 | 248-251 °C | |
| 44 | 55004-88-1 | Ethanone, 1-[4-(2,2-diphenylethenyl)phenyl]- | C22H18O | 298.38 | | |
| 45 | 55005-14-6 | 2H-1-Benzopyran-2-one, 4-hydroxy-3,6-dinitro- | C9H4N2O7 | 252.13726 | | |
| 46 | 55005-18-0 | 2H-1-Benzopyran-2-one, 6-bromo-4-hydroxy-3-nitro-, sodium salt (1:1) | C9H5BrNNaO5 | 310.03 | | |
| 47 | 55005-19-1 | 2H-1-Benzopyran-2-one, 6-ethyl-4-hydroxy-3-nitro- | C11H9NO5 | 235.19 | | |
| 48 | 55005-21-5 | 2H-1-Benzopyran-2-one, 6-bromo-4-hydroxy-3-nitro- | C9H4BrNO5 | 286.04 | | |
| 49 | 55005-22-6 | 2H-1-Benzopyran-2-one, 4-hydroxy-6,7-dimethyl-3-nitro- | C11H9NO5 | 235.19 | | |
| 50 | 55005-23-7 | 2H-1-Benzopyran-2-one, 6-ethyl-4-hydroxy-7-methyl-3-nitro- | C12H11NO5 | 249.22 | | |
| 51 | 55005-24-8 | 2H-1-Benzopyran-2-one, 6,7-diethyl-4-hydroxy-3-nitro- | C13H13NO5 | 263.25 | | |
| 52 | 55005-25-9 | 2H-1-Benzopyran-2-one, 6-ethyl-4-hydroxy-7-methoxy-3-nitro- | C12H11NO6 | 265.22 | | |
| 53 | 55005-26-0 | 2H-1-Benzopyran-2-one, 7-ethoxy-4-hydroxy-3-nitro- | C11H9NO6 | 251.19 | | |
| 54 | 55005-28-2 | 6-ETHYL-4-HYDROXYCOUMARIN | C11H10O3 | 190.2 | 216-218°C | |
| 55 | 55005-32-8 | [1-(4-biphenylyl)ethyl]amine hydrochloride | C14H16ClN | 233.73654 | | |
| 56 | 55005-33-9 | 1-(4-PHENOXYPHENYL)ETHAN-1-AMINE HYDROCHLORIDE | | | | |
| 57 | 55005-49-7 | 9H-Carbazole, 9-(2-methyl-2-propen-1-yl)- | C16H15N | 221.3 | | |
| 58 | 55005-83-9 | Cyclohexanamine, 2-chloro- | C6H12ClN | 133.62 | | |
| 59 | 55005-96-4 | 1-methyl-4-[3-[3-(4-methylphenyl)sulfonyloxypropoxy]propoxysulfonyl]benzene | C20H26O7S2 | 442.54624 | | |
| 60 | 55006-98-9 | 1,1'-Biphenyl,2,2'-bis(1-phenylethenyl)- | C28H22 | 358.47428 | | |
| 61 | 55007-22-2 | 4-(2-METHOXY-5-METHYL-PHENYL)-4-OXO-BUTYRIC ACID | C12H14O4 | 222.24 | | |
| 62 | 55007-44-8 | 2-BROMO-2,4,4-TRIMETHYL-3-PENTANONE | C8H15BrO | 207.11 | | |
| 63 | 55008-18-9 | Methyl 3-amino-2-hydroxy-5-methoxybenzenecarboxylate | C9H11NO4 | 197.19 | | |
| 64 | 55008-19-0 | Benzoic acid, 3-cyano-2-hydroxy-5-methoxy-, methyl ester | C10H9NO4 | 207.18 | | |
| 65 | 55008-57-6 | Gafquat 755N | C16H30N2O7S | 394.4836 | | |
| 66 | 55009-84-2 | METHYL 3-(P-CHLOROBENZYLTHIO)ISOBUTYRATE | C11H13ClO2S | 244.74 | | |
| 67 | 55009-88-6 | 2-(Perfluorooctyl)ethyne | C10HF17 | 444.09 | | |