| Echinacoside, [3H]- | MT 2125 |
| Efaroxan, [3H]- Discontinued | MT 989 |
| Efaroxan, [3H]- | MT 989M |
| Efavirenz | M 1821 |
| Efavirenz, [carbonyl-14C]- | MC 2408 |
| Eicosanoic acid, [1-14C]- | MC 2234 |
| Eicosanyl cyclohexane | M 1618 |
| 1-Eicosanyl cyclohexane, [cyclohexane-1-14C]- | MC 2029 |
| 5,8,11,14,17-Eicosapentaenoic acid, [1-14C]- | MC 2217 |
| 8,11,14-Eicosatrienoic acid, [1-14C]- | MC 2212 |
| 8,11,14-Eicosatrienoyl Coenzyme A, [eicosatrienoic acid-1-14C]- | MC 2213 |
| Eflornithine, [3H]- | MT 1949 |
| Elacridar free base, [14C]- | MC 2689 |
| Eleclazine, [carbonyl-14C]- | MC 2779 |
| Emodin, [3H]- | MT 1759 |
| Emtricitabine | M 1605 |
| Emtricitabine, [2-13C, 1,3-15N2 99 atom % 13C, 98 atom % 15N2]- | MG 126 |
| Emtricitabine, [2-14C]- | MC 2031 |
| Emtricitabine, [6-3H]- | MT 1605 |
| Emtricitabine-diphosphate, triammonium salt | M 1911 |
| Emtricitabine-monophosphate, diammonium salt | M 1884 |
| Emtricitabine-triphosphate, tetraammonium salt | M 1596 |
| Endothall, [ring-2,3-14C]- | MC 2635 |
| Endothall dimethyl-alkyl amine, [dimethyl-14C]- | MC 2681 |
| Enisamium iodide, [benzyl, carbonyl-14C]- | MC 2786 |
| Enrofloxacin, [quinoline-2-14C]- | MC 2423 |
| Entecavir | M 1874 |
| Entecavir, [3H]- | MT 1951 |
| Entecavir monophosphate, diammonium salt | M 1876 |
| Entecavir triphosphate, tetraammonium salt | M 1877 |
| Enzalutamide, [3H]- | MT 2120 |
| (-)-Epicatechin, [2-14C]- | MC 2533 |
| Epichlorohydrin, [2-14C]- | MC 2221 |
| Epithalon, [alanine-14C(U)]- | MC 2157 |
| Ergothioneine, [3H]- | MT 1856 |
| Erlotinib, [phenyl ring-14C(U)]- | MC 2676 |
| Erucic acid, [14-14C]- | MC 2018 |
| Erucic acid, [3H]- | MT 1585 |
| Esculetin, [benzene ring-13C6(U), 99 atom % 13C]- | MG 104 |
| Esculetin, [benzene ring-14C(U)]- | MC 2125 |
| Estradiol, [2,4-3H]- | MT 524 |
| 17β-Estradiol, [4-14C]- | MC 2444 |
| Estragole, [ring-14C(U)]- | MC 2553 |
| Estriol, [2,4-3H]- | MT 1785 |
| ETB-TBOA, [3H]- | MT 2166 |
| Ethanol, [1-14C]- | MC 471 |
| Ethanol, [3H]- | MT 1766 |
| Ethanolamine, [1-14C]- | MC 2085 |
| Ethanolamine, free base, [3H]- | MT 1872 |
| Ethanolamine hydrochloride, [1,2-14C]- | MC 407 |
| Ethanolamine hydrochloride, [1,2-14C]- | MC 407H |
| Ethanolamine hydrochloride, [1,2-3H]- | MT 604 |
| Ethenoadenosine | M 1801 |
| Ethenoadenosine, [3H]- | MT 1824 |
| Ethenocytidine | M 1802 |
| Ethenocytidine, [3H]- | MT 1825 |
| Etheno-2'-deoxyadenosine | M 1761 |
| Etheno-2'-deoxyadenosine, [8-3H(N)]- | MT 1798 |
| Etheno-2'-deoxycytidine | M 1759 |
| Ethephon, [2-chloroethyl-14C(U)]- | MC 2377 |
| Ethocyn, [3H]- | MT 2038 |
| Ethoprop, [1,1'-14C2]- | MC 2337 |
| Ethoprophos, [ethyl-14C]- | MC 2593 |
| 4-Ethoxyaniline, sulfate, [ring-14C]- | MC 2104 |
| 4-(3-Ethoxybutyl)phenol, [ring-14C(U)]- | MC 2497 |
| 2-Ethoxy-2-methylpropionic acid, [ethoxy-D5]- | MD 104 |
| (4-Ethoxyphenyl)-N-t-butylnitrone, [oxime-14C]- | MC 2044 |
| 4-(3-Ethoxypropenyl) benzaldehyde, [carbonyl-14C]- | MC 2148 |
| 2-[4-(3-Ethoxypropenyl)-phenyl]-[1,3]dioxolane, [dioxolane-2-14C]- | MC 2196 |
| Ethoxyquin, [quinoline-2,4-14C2]- | MC 2687 |
| Ethyl acetoacetate, [3-14C]- Discontinued | MC 1293 |
| Ethyl bromoacetate, [2-14C]- | MC 1297 |
| Ethyl-2-bromoisobutyrate, [carbonyl-14C]- | MC 2074 |
| 5'-N-Ethylcarboxamidoadenosine, [adenine-2,8-3H]- | MT 581 |
| 10-Ethyl-10-deazaaminopterin, [3H]- Discontinued | MT 840 |
| 5-Ethyl 2'-deoxyuridine, [ethyl-3H(N)]- Discontinued | MT 724 |
| S-Ethyl dipropylthiocarbamate, [propyl-1-14C]- | MC 2573 |
| Ethylene glycol, [1,2-14C]- | MC 1143 |
| Ethylene glycol, [3H]- | MT 622 |
| Ethyleneglycol monoethyl ether, [1-14C]- | MC 2055 |
| Ethyl-α-D-glucopyranoside, [glucose-1-14C]- | MC 2366 |
| Ethylglycinate hydrochloride, [1-14C]- | MC 111 |
| 3-Ethyl-1,1,1,3,5,5,5-heptamethyltrisiloxane, [14C]- | MC 2698 |
| 2-Ethyl hexanoic acid, tetraester with pentaerythritol, [14C]- | MC 2821 |
| 2-Ethylhexyl-2(2,4-dichlorophenoxy)acetate, [ring-14C(U)]- | MC 2584 |
| 2-Ethylhexyl-p-methoxy-cinnamate, [ring-1-14C, ethylhexyl-1-14C]- | MC 2358 |
| 2-Ethylhexyl-2,3,4,5-tetrabromobenzoate, [carbonyl-14C]- | MC 2465 |
| 2-Ethyl-2-(hydroxymethyl)-1,3-propanediol, [methoxy-14C]- | MC 2692 |
| 2-Ethyl-6-methylanilne, [ring-14C(U)]- | MC 2255 |
| N-(2-Ethyl-6-methylphenyl)-2-hydroxyacetamide, [ring-14C]- | MC 2562 |
| Ethyl nicotinate, [carboxy-14C]- | MC 2095 |
| Ethyl-5-oxohexanoate, [1-14C]- | MC 2075 |
| Ethyl 2-oxopropanoate, [propanoate-1-14C]- | MC 2585 |
| 4'-Ethynyl-2-fluoro-2'-Deoxyadenosine, [8-3H]- | MT 1784 |
| Etidronate disodium | M 1831 |
| Etoposide, [ethylidene-1-14C]- | MC 2035 |
| Etoposide, [3H]- (VP-16-213, [3H]-) (Podophyllotoxin derivative, ) (Podophyllotoxin derivative, [3H]-) | MT 786 |
| Etridiazole, [1,2,4-thiadiazole-3-14C]- | MC 2624 |
| Eugenol, [ring-14C(U)]- | MC 2244 |