| Ochratoxin A, [3H]- | MT 518 |
| 9,12-Octadecadienoic acid, [1-14C]- | MC 2201 |
| 9,12-Octadecadienoyl Coenzyme A, [octadecadienoic acid-1-14C]- | MC 2211 |
| 1-O-Octadecyl-2-O-methyl-sn-glycero-3-phosphonoformate methyl ester, [carbonyl-14C]- | MC 2276 |
| Octamethylcyclotetrasiloxane | M 1915 |
| Octamethylcyclotetrasiloxane, [methyl-13C4]- | MG 127 |
| Octamethylcyclotetrasiloxane, [methyl-14C]- | MC 2177 |
| Octamethyltrisiloxane, [methyl-13C3]- | MG 153 |
| Octamethyltrisiloxane, [14C]- | MC 2697 |
| Octanoic acid, sodium salt, [1-14C]- | MC 1121S |
| Octanoyl Coenzyme A, [octanoyl-1-14C]- | MC 2199 |
| Octenidine Dihydrochloride, [decane-1,10-14C]- | MC 2702 |
| Octenidine Dihydrochloride, [3H]- | MT 2143 |
| Octreotide, [D-phenylalanine-1-14C]- | MC 2611 |
| Octreotide, [3H]- | MT 2053 |
| ODBG(S)HPMPA, ammonium salt, [adenine-8-14C]- | MC 2298 |
| Olanzapine, [3H]- | MT 2141 |
| Oleandrin, [3H]- | MT 1619 |
| Oleic acid, [1-14C]- | MC 406 |
| Oleic acid, [9-14C]- | MC 2475 |
| Oleic acid, [9,10-3H]- | MT 917 |
| Oleoyl Coenzyme A, [oleoyl-1-14C]- | MC 1468 |
| Oleoyl Coenzyme A, [oleoyl-9,10-3H]- | MT 1649 |
| Oleoyl glycerol, [glycerol-1,2,3-3H]- | MT 2077 |
| 2-Oleoyl glycerol ether, [oleic acid-9,10-3H(N)]- | MT 2025 |
| Oleyl alcohol, [oleyl-1-14C]- | MC 2303 |
| Oligonucleotide Custom labeling Service with 3H, 14C, 13C | |
| Oritavancin, diphosphate salt, [benzyl-14C]- | MC 2671 |
| DL-Ornithine hydrochloride, [1-14C]- | MC 168 |
| L-Ornithine hydrochloride, [1-14C]- | MC 161 |
| L-Ornithine hydrochloride, [2,3-3H]- | MT 898 |
| L-Ornithine hydrochloride, [2,3-3H]- | MT 898L |
| Orotic acid, [14C(U)]- Discontinued | MC 261 |
| Orotic acid, [2-14C]- | MC 313 |
| Orotic acid, [5-3H]- | MT 668 |
| Orotic acid, [5-3H]- | MT 668W |
| Orotic acid, methyl ester, [2-14C]- | MC 308 |
| Orphanin FQ, [3H]- | MT 1993 |
| Oryzalin, [ring-14C(U)]- | MC 2453 |
| Oseltamivir phosphate, [3H]- Discontinued | MT 1845 |
| Ovalbumin, [methyl-14C]- (Chicken egg) Discontinued | MC 1469 |
| 1,4,5-Oxadiazepane hydrobromide, [3-14C]- | MC 2535 |
| Oxalic acid, [14C]- | MC 1122 |
| Oxalic acid, [14C]- | MC 1122H |
| Oxaliplatin, [cyclohexane-14C(U)]- | MC 2321 |
| Oxalyl dimethylester, [1,2-14C]- | MC 2117 |
| Oxandrolone, [17-methyl-14C]- | MC 2483 |
| (5R)-3-[4-(5,6-Dihydro-1-methyl-1,2,4-triazin-4(1H)-yl)-3-fluorophenyl]-5-(hydroxymethyl)-2-oxazolidinone, [carbonyl-14C]- | MC 2776 |
| 4,4'-(Oxydi-2,1-ethanediyl) bismorpholine, [morpholine-2,6-14C]- | MC 2352 |
| Oxoglutaric acid, sodium salt, [3H]- | MT 1791 |
| Oxyfluorfen, [nitrophenyl ring-14C(U)]- | MC 2464 |
| Oxymetazoline, [3H]- | MT 1868 |
| Oxypurinol, [7-14C]- | MC 2542 |