| CAS编号 | 中文名 | 英文名 | 分子式 | 分子量 | 熔点 | 沸点 |
| 4198-90-7 | 4-羟基-3,5-二甲基苯腈 | 3,5-dimethyl-4-hydroxy-benzonitril | C9H9NO | 147.17 | 123-127 °C | 310.6ºC at 760 mmHg |
| 41980-31-8 | | piperidine-2,6-dicarbonitrile | | | | |
| 41981-20-8 | 4-(氯甲基)-n-苯基-1,3-噻唑-2-胺盐酸盐 | 4-(chloromethyl)-n-phenyl-1,3-thiazol-2-amine hydrochloride | | | | |
| 41981-75-3 | | 4-ethyl-2-methyl-5-propyl-thiazol | | | | |
| 41983-91-9 | | 4h-1-benzopyran-4-one, 2,3-dihydro-5,7-dihydroxy-8-(3-methyl-2-butenyl)-2-pheny | | | | |
| 41985-20-0 | | Tin,dibromodimethylbis[sulfinylbis[methane]-O]- | C6H18Br2O2S2Sn2 | 583.52 | | |
| 41987-47-7 | | 7-ab)(1)benzazepine-2-methanamine, 6,7-dihydro-n,n-dimethyl-indolo( monohydr | | | | |
| 41989-07-5 | | | C19H36O3 | 312.49 | | |
| 41989-08-6 | | phosphoric acid, monooctyl ester, monopotassium salt | | | | |
| 4199-10-4 | | (S)-propranolol hydrochloride | | | 193-195℃ | |
| 4199-31-9 | | (4S,4as,6S,12as)-7-chloro-4-(dimethylamino)-3,6,10,12a-tetrahydroxy-6-methyl-1,11,12-trioxo-1,4,4a,5,6,11,12,12a-octahydro-2-naphthacenecarboxamide | | | | |
| 4199-35-3 | | (4S,4as,5ar,12as)-4-(dimethylamino)-3,10,12,12a-tetrahydroxy-9-nitro-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydro-2-naphthacenecarboxamide | | | | |
| 4199-88-6 | | 5-nitro-10-phenanthroline | C12H7N3O2 | 225.20 | 199-203℃ | |
| 4199-89-7 | 5-氯邻菲得啉 | 5-chloro-10-phenanthroline | C12H7ClN2 | 214.65 | 124-126℃ | |
| 41991-50-8 | | Tin,dibromobis[N,N-dimethylformamide-O]dimethyl- | C8H20Br2N2O2Sn | 454.76 | | |
| 41991-85-9 | | 2,5,5-tris(trimethylsilyl)-1,3-cyclo-pentadiene, | | | | |
| 41991-87-1 | | 2,3,5,5-tetrakis(trimethylsilyl)-1,3-cyclopentadi | | | 38-41℃ | |
| 41992-22-7 | | 2-aza-8-germaspiro(4.5)decane-2-propanamine, 8,8-diethyl-n,n-dimethyl, dihydroc | | | | |
| 41992-23-8 | | spirogermanium | | | | |
| 41992-55-6 | | α-3,4,5,6-tetrachloro-cyclohexene | C6H6Cl4 | 219.92 | | |
| 41994-02-9 | 生物素基酪酰胺 | biotinyl tyramide | C18H25N3O3S | 363.47 | | |
| 41994-34-7 | | 7,12-dihydroisoquino[3,2-c][1,4]benzodiazepine-6,14(5h,6ah)-dione | | | | |
| 41994-44-9 | | 5-chloro-2-nitrobenzoyl chloride | | | | |
| 41994-45-0 | 2-哌啶甲酸甲酯 | methyl 2-piperidinecarboxylate | C7H13NO2 | 143.18 | | |
| 41994-50-7 | 2,5-吡咯烷二羧酸二乙酯草酸盐 | diethyl pyrrolidine-2,5-dicarboxylate | C10H17NO4 | 215.25 | | |
| 41994-51-8 | | 1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid hydrochloride | C10H11NO2 · HCl | 213.66 | >300 ℃(lit.) | |
| 41994-80-3 | | 4-pentanediol, 2-methyl- titanium(4++) salt | | | | |
| 41995-19-1 | | 2-amino-3',4'-dichloroacetophenone hcl | | | | |
| 41995-29-3 | 6-丙基吡啶-2-胺 | 6-propylpyridin-2-amine | C8H12N2 | 136.19 | | |
| 41995-30-6 | 2-氨基-3,5-二甲基吡啶 | 2-amino-3,5-dimethylpyridine | C7H10N2 | 122.17 | 85-95°C | 239.9°C |
| 41995-31-7 | | 2-amino-3-ethyl-6-methylpyridine | C8H12N2 | 136.19 | 45-48 °C | 239.7 °C at 760 mmHg |
| 41996-78-5 | 安息香双乙醚 | Ethanone,2,2-diethoxy-1,2-diphenyl- | C18H20O3 | | | |
| 41996-97-8 | | 1-(4-bromo-butyl)-4-vinyl-benzene | C12H15Br | 239.15 | | |
| 419987-11-2 | 2-乙基-4-氧代环戊基羧酸乙酯 | Ethyl 2-ethyl-4-oxocyclopentanecarboxylate | C10H16O3 | 184.23 | | |
| 41999-41-1 | | 1-decene-1-sulfonic acid, sodium salt | | | | |
| 41999-58-0 | | cp-69637 | | | | |
| 42-49-9 | | | C15H29NO2 | | | |
| 420-03-1 | 氟甲醇 | Methanol,fluoro- | CH3FO | 50.03 | | |
| 420-04-2 | (单)氰胺 | Cyanamide solution | CH2N2 | 42.04 | 44-46℃ | 83 °C/0.5 mmHg(lit.) |
| 420-05-3 | 氰酸 | Hydroxy cyanide | CHNO | 43.02 | | |
| 420-12-2 | | ethylene sulphide | C2H4S | 60.12 | -109 °C | 55-56 °C(lit.) |
| 420-16-6 | | Boron trifluoride acetonitrile complex solution | C2H3BF3N | 108.86 | | |
| 420-20-2 | | trimethylamine-boron trifluoride(1:1)complex | C3H9BF3N | 126.92 | | |
| 420-21-3 | | Boron,trifluoro(trimethylphosphine)-,(T-4)- | C3H9BF3P | 143.88 | | |
| 420-24-6 | | arsine, difluoromethyl | CH3AsF2 | 127.95 | | |
| 420-26-8 | | 2-fluoropropane | C3H7F | 62.09 | | |
| 420-32-6 | | thiocarbonyl difluoride | CF2S | 82.07 | | |
| 420-33-7 | | carbamyl fluoride | CH2FNO | 63.03 | | |
| 420-34-8 | | methyldifluorosilane | CH4F2Si | 82.12 | | |
| 420-37-1 | 三甲基四氟硼酸锇 | trimethyl-oxoniu tetrafluoroborate(1-) | C3H9BF4O | 147.91 | 200 °C | 39.8-40 °C(二氯甲烷) |
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