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Zonisamide-d4
CAS: 1020720-04-0 PubChem CID: 45040707 Formula: C₈H₄D₄N₂O₃S Molecular Weight: 216.25

≥95 atom% D,≥95%

In Stock Item #: Z334653

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IUPAC Name

(4,5,6,7-tetradeuterio-1,2-benzoxazol-3-yl)methanesulfonamide

SMILES

C1=CC=C2C(=C1)C(=NO2)CS(=O)(=O)N

InChIKey
UBQNRHZMVUUOMG-RHQRLBAQSA-N

InChI

1S/C8H8N2O3S/c9-14(11,12)5-7-6-3-1-2-4-8(6)13-10-7/h1-4H,5H2,(H2,9,11,12)/i1D,2D,3D,4D

Synonyms
1-[(~2~H_4_)-1,2-Benzoxazol-3-yl]methanesulfonamide | 3-(Sulfamoylmethyl)-1,2-benzisoxazole-d4 | 1020720-04-0 | 1,2-B...
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Zofenopril-d5, Inhibitor of Angiotensin-converting enzyme
CAS: 81872-10-8 unlabeled PubChem CID: 92400 Formula: C₂₂H₁₈D₅NO₄S₂ Molecular Weight: 434.58

Moligand™ ?

Out of Stock Item #: Z333827

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IUPAC Name

(2S,4S)-1-[(2S)-3-benzoylsulfanyl-2-methylpropanoyl]-4-phenylsulfanylpyrrolidine-2-carboxylic acid

SMILES

CC(CSC(=O)C1=CC=CC=C1)C(=O)N2CC(CC2C(=O)O)SC3=CC=CC=C3

InChIKey
IAIDUHCBNLFXEF-MNEFBYGVSA-N

InChI

1S/C22H23NO4S2/c1-15(14-28-22(27)16-8-4-2-5-9-16)20(24)23-13-18(12-19(23)21(25)26)29-17-10-6-3-7-11-17/h2-11,15,18-19H,12-14H2,1H3,(H,25,26)/t15-,18+,show more

Synonyms
SCHEMBL37298 | SQ-26900 | HY-108321 | NCGC00167455-01 | Spectrum3_001305 | Zofenopril (INN) | Zofenoprilum | BDBM5008...
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Isopropyl-d7-amine hydrochloride
CAS: 106658-09-7 Formula: C₃H₂D₇N Molecular Weight: 66.15

Out of Stock Item #: I340244

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IUPAC Name

1,1,1,2,3,3,3-heptadeuteriopropan-2-amine

SMILES

CC(C)N

InChIKey
JJWLVOIRVHMVIS-YYWVXINBSA-N

InChI

1S/C3H9N/c1-3(2)4/h3H,4H2,1-2H3/i1D3,2D3,3D

Synonyms
Isopropyl-d7-amine Hydrochloride | AKOS015910314 | Isopropyl-d7-amine, 98 atom % D, 98% (CP) | 2-Propan-1,1,1,2,3,3,3...
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Sulfaquinoxaline-D4
CAS: 1329652-02-9 Formula: C₁₄H₈D₄N₄O₂S Molecular Weight: 304.36

Solid ≥98%,≥98atom%D

Out of Stock Item #: S266096

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Synonyms
4-Amino-N-2-quinoxalinylbenzenesulfonamide-d4
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U-[13C24]-T-2 toxin
CAS: 21259-20-1(unlabeled) Formula: 13C₂₄H₃₄O₉ Molecular Weight: 490.35

25μg/mL in acetonitrile

Out of Stock Item #: T299693

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Synonyms
Fusariotoxin T2；MYCOTOXIN T2；8-(3-Methylbutyryloxy)-diacetoxyscirpenol；Trichothec-9-ene-3.alpha.,8.alpha.,15-tetrol, ...
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Tamoxifen-ethyl-d5
CAS: 157698-32-3 Formula: C₂₆H₂₄D₅NO Molecular Weight: 376.55

Out of Stock Item #: T334676

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IUPAC Name

N,N-dimethyl-2-[4-[(Z)-3,3,4,4,4-pentadeuterio-1,2-diphenylbut-1-enyl]phenoxy]ethanamine

SMILES

CCC(=C(C1=CC=CC=C1)C2=CC=C(C=C2)OCCN(C)C)C3=CC=CC=C3

InChIKey
NKANXQFJJICGDU-FUYVPVGLSA-N

InChI

1S/C26H29NO/c1-4-25(21-11-7-5-8-12-21)26(22-13-9-6-10-14-22)23-15-17-24(18-16-23)28-20-19-27(2)3/h5-18H,4,19-20H2,1-3H3/b26-25-/i1D3,4D2

Synonyms
J-009441 | (E/Z)-Tamoxifen-d5 | AKOS040739817 | MS-26118 | (Z)-2-(4-(1,2-Diphenyl-1-butenyl-3,3,4,4,4-d5)phenoxy)-N,N...
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Taurolithocholic Acid-d5 Sodium Salt (Major)
CAS: 1265476-97-8 PubChem CID: 46782976 Formula: C₂₆H₃₉D₅NNaO₅S Molecular Weight: 510.72

≥95%,≥95 atom% D Deuterated from d0-d6

Out of Stock Item #: T358194

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IUPAC Name

sodium;2-[[(4R)-4-[(3R,5R,8R,10S,13R,14S)-2,2,3,4,4-pentadeuterio-3-hydroxy-10,13-dimethyl-1,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenashow more

SMILES

CC(CCC(=O)NCCS(=O)(=O)[O-])C1CCC2C1(CCC3C2CCC4C3(CCC(C4)O)C)C.[Na+]

InChIKey
YAERYJYXPRIDTO-SDXLJUFPSA-M

InChI

1S/C26H45NO5S.Na/c1-17(4-9-24(29)27-14-15-33(30,31)32)21-7-8-22-20-6-5-18-16-19(28)10-12-25(18,2)23(20)11-13-26(21,22)3;/h17-23,28H,4-16H2,1-3H3,(H,27show more

Synonyms
2-[[(3α,5β)-3-Hydroxy-24-oxocholan-24-yl-d5]amino]ethanesulfonic Acid Sodium Salt | N-(3α-Hydroxy-5β-cholan-24-oyl)ta...
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Fluticasone propionate-d5
CAS: 1093258-28-6 Formula: C₂₅H₂₆F₃O₅SD₅ Molecular Weight: 505.61

≥92%,≥95 atom% D

Out of Stock Item #: F336070

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IUPAC Name

[(6S,8S,9R,10S,11S,13S,14S,16R,17R)-6,9-difluoro-17-(fluoromethylsulfanylcarbonyl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,11,12,14,15,16-octahydrocshow more

SMILES

CCC(=O)OC1(C(CC2C1(CC(C3(C2CC(C4=CC(=O)C=CC43C)F)F)O)C)C)C(=O)SCF

InChIKey
WMWTYOKRWGGJOA-AMTWIDTLSA-N

InChI

1S/C25H31F3O5S/c1-5-20(31)33-25(21(32)34-12-26)13(2)8-15-16-10-18(27)17-9-14(29)6-7-22(17,3)24(16,28)19(30)11-23(15,25)4/h6-7,9,13,15-16,18-19,30H,5,8show more

Synonyms
[(6S,8S,9R,10S,11S,13S,14S,16R,17R)-6,9-difluoro-17-(fluoromethylsulfanylcarbonyl)-11-hydroxy-10,13,16-trimethyl-3-ox...
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Telbivudine-d3
CAS: 3424-98-4(unlabelled) Formula: C₁₀H₁₁D₃N₂O₅ Molecular Weight: 245.25

≥95 atom% D,≥95%

Out of Stock Item #: T395204

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Synonyms
1-(2-Deoxy-β-L-erythro-pentofuranosyl)-5-(methyl-d3)-2,4(1H,3H)-pyrimidinedione-d3 | 1-(2-deoxy-β-L-erythro-pentofura...
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Sarafloxacin-d8 hydrochloride
CAS: 2733145-07-6 Formula: C₂₀H₁₀D₈ClF₂N₃O₃ Molecular Weight: 429.87

≥98 atom% D

In Stock Item #: S357885

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Synonyms
6-Fluoro-1-(p-fluorophenyl)-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid monohydrochloride | Pharma...
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Gentian Violet-d6
CAS: 1266676-01-0 EC Number: 978-565-6 Formula: C₂₅H₂₄D₆ClN₃ Molecular Weight: 414.02

Solid ≥98%,≥98 atom% D

In Stock Item #: G355482

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IUPAC Name

[4-[bis[4-(dimethylamino)phenyl]methylidene]cyclohexa-2,5-dien-1-ylidene]-bis(trideuteriomethyl)azanium;chloride

SMILES

CN(C)C1=CC=C(C=C1)C(=C2C=CC(=[N+](C)C)C=C2)C3=CC=C(C=C3)N(C)C.[Cl-]

InChIKey
ZXJXZNDDNMQXFV-TXHXQZCNSA-M

InChI

1S/C25H30N3.ClH/c1-26(2)22-13-7-19(8-14-22)25(20-9-15-23(16-10-20)27(3)4)21-11-17-24(18-12-21)28(5)6;/h7-18H,1-6H3;1H/q+1;/p-1/i1D3,2D3;

Synonyms
N-[4-[bis[4-(dimethylamino)phenyl]methylene]-2,5-cyclohexadien-1-ylidene]-N-(methyl-d3)-, chloride (1:1) | Methyl Vio...
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Nε-(1-Carboxymethyl)-L-lysine-d4
CAS: 936233-18-0 Formula: C₈H₁₆N₂O₄ Molecular Weight: 208.25

≥98 atom% D,≥95%

Out of Stock Item #: N334643

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IUPAC Name

(2S)-2-amino-6-(carboxymethylamino)-4,4,5,5-tetradeuteriohexanoic acid

SMILES

C(CCNCC(=O)O)CC(C(=O)O)N

InChIKey
NUXSIDPKKIEIMI-WCEGGVOZSA-N

InChI

1S/C8H16N2O4/c9-6(8(13)14)3-1-2-4-10-5-7(11)12/h6,10H,1-5,9H2,(H,11,12)(H,13,14)/t6-/m0/s1/i1D2,2D2

Synonyms
AKOS015969257 | N~6~-(Carboxymethyl)-L-(4,4,5,5-~2~H_4_)lysine | (2S)-2-amino-6-(carboxymethylamino)-4,4,5,5-tetradeu...

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Frequently Asked Questions

How do I choose between 2H, 13C, 15N, and 18O labeling?

Deuterium (2H) is most common for NMR and metabolic studies due to lower cost. 13C provides minimal mass shift for MS quantitation. 15N is essential for protein dynamics and metabolic flux. 18O is used for proteomics and water-tracking studies.

What isotopic enrichment levels are available?

Typical enrichments are 98 atom% for deuterium, 99 atom% for 13C and 15N, and up to 99.9% for specialty grades. Higher enrichment reduces interference in quantitative MS but costs more — match the level to your sensitivity needs.

What specifications matter for isotope-labeled compounds?

Isotopic enrichment (atom%), chemical purity, position of label, isotopologue purity (single vs. multi-labeled), storage stability, and pack size. Always check for unlabeled (natural abundance) contamination in quantitative work.

Are deuterated NMR solvents available?

Yes. The Stable Isotopes category includes CDCl3, DMSO-d6, D2O, CD3OD, and other common NMR solvents at typical 99.8–99.9% D enrichment with low water content options.

Stable isotope products are commonly used for labeling, tracing, mechanistic studies, analytical standards, and metabolism-related work. Key comparison points usually include isotope type, enrichment level, labeling position, molecular structure, stability, and whether the labeled product fits the analytical method or biological question being studied. Because isotope-labeled reagents are often selected very specifically, a dedicated category helps users narrow quickly from the broad isotope concept to the exact labeled compound needed. Review the individual product page closely for structure and labeling details when planning experiments or preparing standards.