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Isotope Standards

Compounds (solids, liquids, gasses) with well-defined isotopic compositions that act as the ultimate sources of accuracy in mass spectrometric measurements of isotope ratios.

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1 – 15 of 30 results
1

Cycloguanil-d6, MedChemExpress

MedChemExpress Cycloguanil D6 is the deuterium labeled Cycloguanil, which is a dihydrofolate reductase inhibitor.

ENCOMPASS_PREFERRED
2

Proguanil-d6, MedChemExpress

MedChemExpress Proguanil D6 is the deuterium labeled Proguanil, which is a prophylactic antimalarial drug.

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3

Hydroxy Itraconazole-d8, MedChemExpress

MedChemExpress Hydroxy Itraconazole D8 is the deuterium labeled Hydroxy Itraconazole. Hydroxy Itraconazole is an active metabolite of Itraconazole (ITZ), which is a triazole antifungal agent.

ENCOMPASS_PREFERRED
Percent Purity 98.0%
Molecular Weight (g/mol) 729.68
Color White
Physical Form Powder
Chemical Name or Material Hydroxy Itraconazole-d8
Grade Research
SMILES O=C1N(C(C([2H])([2H])[2H])([2H])C(O)([2H])C([2H])([2H])[2H])N=CN1C2=CC=C(N3CCN(C4=CC=C(OCC5OC(CN6N=CN=C6)(C7=CC=C(Cl)C=C7Cl)OC5)C=C4)CC3)C=C2
Synonym R-63373-d8
Purity Grade Notes Research
Recommended Storage Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Shelf Life Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Molecular Formula C35H30D8Cl2N8O5
Formula Weight 729.68
4

Fexofenadine-d6, MedChemExpress

MedChemExpress Fexofenadine D6 (MDL-16455 D6) is deuterium labeled is Fexofenadine, which is an antihistamine pharmaceutical agent.

ENCOMPASS ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 507.69
Color White
Physical Form Powder
Chemical Name or Material Fexofenadine-d6
Grade Research
SMILES OC(C1=CC=CC=C1)(C2=CC=CC=C2)C3CCN(CCCC(C4=CC=C(C(C(O)=O)(C([2H])([2H])[2H])C([2H])([2H])[2H])C=C4)O)CC3
Percent Purity 98.0%
CAS 548783-71-7
Industry Type Neuroscience-Neuromodulation
Synonym MDL-16455-d6 Terfenadine carboxylate-d6
Purity Grade Notes Research
Recommended Storage Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Shelf Life Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Molecular Formula C32H33D6NO4
Formula Weight 507.69
5

Netupitant-d6, MedChemExpress

MedChemExpress Netupitant D6 is the deuterium labeled Netupitant (CID-6451149), which is a highly potent and selective, orally active neurokinin-1 (NK1) receptor antagonist.

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6

Mycophenolic acid-d3, MedChemExpress

MedChemExpress Mycophenolic acid D3 (Mycophenolate D3) is deuterium labeled Mycophenolic acid, which is an an immunosuppresant drug and has potent anti-proliferative activity.

ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 323.36
Color White
Physical Form Solid
Chemical Name or Material Mycophenolic acid-d3
Grade Research
SMILES O=C(OC1)C2=C1C(C)=C(OC([2H])([2H])[2H])C(C/C=C(C)/CCC(O)=O)=C2O
Percent Purity 98.0%
CAS 1185242-90-3
Synonym Mycophenolate-d3
Purity Grade Notes Research
Recommended Storage Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Shelf Life Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Molecular Formula C17H17D3O6
Formula Weight 323.36
7

Tetrabenazine-d6, MedChemExpress

MedChemExpress Tetrabenazine D6 is the deuterium labeled Tetrabenazine, which is a VMAT-inhibitor used for treatment of hyperkinetic movement disorder.

ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 323.46
Color Off-White
Physical Form Solid
Chemical Name or Material Tetrabenazine-d6
Grade Research
SMILES O=C1[C@H](CC(C)C)CN2CCC3=CC(OC([2H])([2H])[2H])=C(OC([2H])([2H])[2H])C=C3[C@@]2([H])C1
Percent Purity 98.3%
CAS 1392826-25-3
Industry Type Neuroscience-Neuromodulation
Synonym Ro 1-9569-d6
Purity Grade Notes Research
Recommended Storage 4°C, protect from light∣In solvent : -80°C, 6 months∣-20°C, 1 month (protect from light)
Shelf Life 4°C, protect from light∣In solvent : -80°C, 6 months∣-20°C, 1 month (protect from light)
Molecular Formula C19H21D6NO3
Formula Weight 323.46
8

Nitazoxanide-d4, MedChemExpress

MedChemExpress Nitazoxanide D4 (NTZ D4) is the deuterium labeled Nitazoxanide, which is an antiprotozoal agent.

ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 311.31
Color Off-White
Physical Form Solid
Chemical Name or Material Nitazoxanide-d4
Grade Research
SMILES O=C(NC1=NC=C([N+]([O-])=O)S1)C2=C(OC(C)=O)C([2H])=C([2H])C([2H])=C2[2H]
Percent Purity 98.0%
CAS 1246819-17-9
Synonym NTZ-d4 NSC-697855-d4
Purity Grade Notes Research
Recommended Storage Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Shelf Life Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Molecular Formula C12H5D4N3O5S
Formula Weight 311.31
9

Etoricoxib-d4, MedChemExpress

MedChemExpress Etoricoxib D4 (MK-0663 D4) is a deuterium labeled Etoricoxib. Etoricoxib is a non steroidal anti-inflammatory agent, acting as a selective and orally active COX-2 inhibitor, with IC50s of 1.1 μM and 116 μM for COX-2 and COX-1 in human whole blood.

ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 362.87
Color Light Nude
Physical Form Powder
Chemical Name or Material Etoricoxib-d4
Grade Research
SMILES ClC(C=N1)=CC(C2=C([2H])C([2H])=C(S(C)(=O)=O)C([2H])=C2[2H])=C1C3=CN=C(C)C=C3
Percent Purity 99.35%
CAS 1131345-14-6
Synonym MK-0663-d4 L-791456-d4
Purity Grade Notes Research
Recommended Storage Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Shelf Life Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Molecular Formula C18H11D4ClN2O2S
Formula Weight 362.87
10

Paricalcitol-d6, MedChemExpress

MedChemExpress Paricalcitol-d6 is the deuterium labeled Paricalcitol. Paricalcitol is a drug used for the prevention and treatment of secondary hyperparathyroidism (excessive secretion of parathyroid hormone) associated with chronic renal failure.

ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 422.67
Color White
Physical Form Solid
Chemical Name or Material Paricalcitol-d6
Grade Research
SMILES C[C@]([C@@H]([C@@H](/C=C/[C@@H](C(C([2H])([2H])[2H])(C([2H])([2H])[2H])O)C)C)CC1)(CCC/2)[C@@]1(C2=C\C=C3C[C@H](C[C@@H](C/3)O)O)[H]
Percent Purity 99.64%
CAS 2070009-67-3
Industry Type Metabolism-sugar/lipid metabolism
Solubility Information DMSO : 100 mg/mL (236.59 mM; Need ultrasonic)
Purity Grade Notes Research
Recommended Storage Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Shelf Life Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Molecular Formula C27H38D6O3
Formula Weight 422.67
11

Calcifediol-d6, MedChemExpress

MedChemExpress Calcifediol-d6 is the deuterium labeled Calcifediol. Calcifediol, a major circulating metabolite of vitamin D3, is a potent VDR inhibitor.

ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 406.67
Color White
Physical Form Solid
Chemical Name or Material Calcifediol-d6
Grade Research
SMILES O[C@@H](CCC/1=C)CC1=C\C=C2[C@@](CC[C@@H]3[C@@H](CCCC(C([2H])([2H])[2H])(C([2H])([2H])[2H])O)C)([H])[C@]3(C)CCC\2
Percent Purity 98.0%
CAS 78782-98-6
Industry Type Metabolism-sugar/lipid metabolism
Purity Grade Notes Research
Recommended Storage -20°C, protect from light, stored under nitrogen∣In solvent : -80°C, 6 months∣-20°C, 1 month (protect from light, stored under nitrogen)
Shelf Life -20°C, protect from light, stored under nitrogen∣In solvent : -80°C, 6 months∣-20°C, 1 month (protect from light, stored under nitrogen)
Molecular Formula C27H38D6O2
Formula Weight 406.67
12

Nepafenac-d5, MedChemExpress

MedChemExpress Nepafenac D5 (AHR-9434 D5) is the deuterium labeled Nepafenac, which is a selective COX-2 inhibitor.

ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 259.31
Color Yellow
Physical Form Solid
Chemical Name or Material Nepafenac-d5
Grade Research
SMILES O=C(C1=C([2H])C([2H])=C([2H])C([2H])=C1[2H])C2=CC=CC(CC(N)=O)=C2N
Percent Purity 98.0%
CAS 1246814-53-8
Solubility Information DMSO : ≥ 100 mg/mL (385.64 mM)
Synonym AHR-9434-d5 AL-6515-d5
Purity Grade Notes Research
Recommended Storage Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Shelf Life Powder -20°C 3 years, 4°C 2 years∣In solvent -80°C 6 months, -20°C 1 month
Molecular Formula C15H9D5N2O2
Formula Weight 259.31
13

Pyridostigmine-d6 bromide, MedChemExpress

MedChemExpress Pyridostigmine D6 bromide is the deuterium labeled Pyridostigmine, which is a parasympathomimetic and a reversible cholinesterase inhibitor.

ENCOMPASS_PREFERRED
Molecular Weight (g/mol) 267.15
Color White
Physical Form Solid
Chemical Name or Material Pyridostigmine-d6 bromide
Grade Research
SMILES O=C(N(C([2H])([2H])[2H])C([2H])([2H])[2H])OC1=CC=C[N+](C)=C1.[Br-]
Percent Purity 98.0%
CAS 2375858-08-3
Solubility Information DMSO : 50 mg/mL (187.16 mM; Need ultrasonic)
Purity Grade Notes Research
Recommended Storage 4°C, sealed storage, away from moisture∣In solvent : -80°C, 6 months∣-20°C, 1 month (sealed storage, away from moisture)
Shelf Life 4°C, sealed storage, away from moisture∣In solvent : -80°C, 6 months∣-20°C, 1 month (sealed storage, away from moisture)
Molecular Formula C9H7D6BrN2O2
Formula Weight 267.15
14

Irbesartan-d4, MedChemExpress

MedChemExpress Irbesartan D4 is the deuterium labeled Irbesartan, which is a highly potent and specific angiotensin II type 1 (AT1) receptor antagonist.

ENCOMPASS_PREFERRED
15

(±)-Levomepromazine-d6, MedChemExpress

MedChemExpress (±)-Levomepromazine D6 ((±)-Methotrimeprazine D6) is the deuterium labeled Methotrimeprazine, which is a D3 dopamine and Histamine H1 receptor antagonist.

ENCOMPASS_PREFERRED