Why might a deuterated standard elute slightly earlier than the analyte?

Carbon-deuterium bonds are slightly shorter and less polarisable than carbon-hydrogen bonds, which can reduce retention in reversed-phase LC. The shift is usually small, but heavily deuterated standards may separate enough to experience different matrix effects.

When is carbon-13 labelling better than deuterium?

Carbon-13 and nitrogen-15 labels co-elute with the analyte and cannot exchange with solvent. They are preferred for demanding bioanalysis, although they are usually harder and more expensive to synthesise.

Can you make a labelled version of a compound that is not listed?

Often, yes. Our custom synthesis service can introduce deuterium or carbon-13 at chosen positions, subject to feasibility. Send the structure and the required mass shift with your enquiry.

Chemical grade

Deuterated and Stable-Isotope-Labelled Compounds chemicals

Compounds enriched in deuterium, carbon-13 or nitrogen-15 for LC-MS internal standards, NMR solvents and metabolic studies.

967 products in this grade

Deuterated and Stable-Isotope-Labelled Compounds products

169–192 of 967 products

4-Nitrophenol D4

CAS: 93951-79-2
Formula: C₆H₅NO₃
MW: 143.13 g/mol

ZX-042322

4-tert-Octylphenol Diethoxylate-13C6

CAS: 1173020-69-3
Formula: C₁₈H₃₀O₃
MW: 300.38 g/mol

ZX-043261

4-tert-Octylphenol Monoethoxylate-13C6

CAS: 1173019-48-1
Formula: C₁₆H₂₆O₂
MW: 256.33 g/mol

ZX-043262

4,4'-Dipyridyl-d8

CAS: 132125-39-4
Formula: C₁₀H₈N₂
MW: 164.23 g/mol

ZX-046798

4'-Hydroxy Diclofenac-13C6(Contain 3% unlabeled)

CAS: 1189656-64-1
Formula: C₁₄H₁₁Cl₂NO₃
MW: 318.1 g/mol

ZX-043166

4'-Hydroxy Tamoxifen-d6 (contains up to 10% E isomer)

CAS: 1346606-80-1
Formula: C₂₆H₂₉NO₂
MW: 393.5 g/mol

ZX-043169

5-(Methyl-d3)tetrahydrofolic acid

CAS: 1356019-97-0
Formula: C₂₀H₂₅N₇O₆
MW: 462.5 g/mol

ZX-029623

5-Fluorouracil-15N2

CAS: 68941-95-7
Formula: C₄H₃FN₂O₂
MW: 132.06 g/mol

ZX-033478

5-Hydroxy Topotecan-d6

CAS: 504413-73-4
Formula: C₂₃H₂₃N₃O₆
MW: 437.4 g/mol

ZX-027356

5-Hydroxymebendazole-d3

CAS: 1173020-86-4
Formula: C₁₆H₁₅N₃O₃
MW: 300.33 g/mol

ZX-044930

5-Methylisoxazole-3-carboxylic-d4 Acid

CAS: 1267623-84-6
Formula: C₅H₅NO₃
MW: 127.1 g/mol

ZX-043143

5-Oxo-L-proline-d5

CAS: 1086136-22-2
Formula: C₅H₇NO₃
MW: 134.14 g/mol

ZX-043184

5α Dihydrotestosterone-d3 solution ampola 100 μg/ml

CAS: 79037-34-6
Formula: C₁₉H₃₀O₂
MW: 293.5 g/mol

ZX-044422

6-[[3-[(1S)-2-Methoxy-1-methylethoxy]-5-[(1S)-1-methyl-2-phenylethoxy]benzoyl]amino]-3-pyridinecarboxylic Acid-d5

CAS: 851884-87-2
Formula: C₂₆H₂₈N₂O₆
MW: 464.5 g/mol

ZX-043685

6-Hydroxy Buspirone D8

CAS: 1189644-16-3
Formula: C₂₁H₃₁N₅O₃
MW: 409.6 g/mol

ZX-028386

6-Methoxy-2-Naphthaleneacetic acid-d3

CAS: 1189427-82-4
Formula: C₁₃H₁₂O₃
MW: 219.25 g/mol

ZX-030746

6-Methylmercaptopurine-d3

CAS: 33312-93-5
Formula: C₆H₆N₄S
MW: 169.22 g/mol

ZX-030505

7-Amino Clonazepam D4

CAS: 1215070-96-4
Formula: C₁₅H₁₂ClN₃O
MW: 289.75 g/mol

ZX-047937

9H-Purin-1,3-15N2-6-amine

CAS: 97908-71-9
Formula: C₅H₅N₅
MW: 137.11 g/mol

ZX-042556

Abacavir-d4

CAS: 1260619-56-4
Formula: C₁₄H₁₈N₆O
MW: 290.36 g/mol

ZX-023114

Abemaciclib D5

CAS: 1809251-51-1
Formula: C₂₇H₃₂F₂N₈
MW: 511.6 g/mol

ZX-020430

Abemaciclib D8

CAS: 2088650-53-5
Formula: C₂₇H₃₂F₂N₈
MW: 514.6 g/mol

ZX-023117

Abiraterone-d4

CAS: 2122245-62-7
Formula: C₂₄H₃₁NO
MW: 353.5 g/mol

ZX-027859

Acamprosate-d3 Calcium

CAS: 1225580-94-8
Formula: C₅H₁₀CaNO₄S⁺
MW: 223.3 g/mol

ZX-027866

Compare with other grades

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