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.

1 – 15 of 32 results

Lead 207 Isotope Standard for ICP/MS, SPEX CertiPrep™

Pricing and Availability

Lead 206 Isotope Standard For ICP/MS, SPEX CertiPrep™

Pricing and Availability

Enalaprilat-d5 sodium, MedChemExpress

MedChemExpress Enalaprilat (MK-422) D5 Sodium Salt is the deuterium labeled Enalaprilat(MK-422), which is an angiotensin-converting enzyme (ACE) inhibitor.

Pricing and Availability

Proguanil-d6, MedChemExpress

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

Pricing and Availability

MedChemExpress Omeprazole-d3 (H 16868-d3) is deuterium labeled Omeprazole. Omeprazole, a proton pump inhibitor (PPI), is available for treatment of acid-related gastrointestinal disorders. Omeprazole shows competitive inhibition of CYP2C19 activity with a Ki of 2 to 6 μM. Omeprazole also inhibits growth of Gram-positive and Gram-negative bacteria.

Pricing and Availability

Nitazoxanide-d4, MedChemExpress

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

Pricing and Availability
Specifications

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

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.

Pricing and Availability
Specifications

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

Tetrabenazine-d6, MedChemExpress

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

Pricing and Availability
Specifications

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
For Use With (Application)	Neuroscience-Neuromodulation
Percent Purity	98.3%
CAS	1392826-25-3
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

Candesartan-d4, MedChemExpress

MedChemExpress Candesartan D4 (CV-11974 D4) is the deuterium labeled Candesartan, which is an angiotensin II receptor antagonist.

Pricing and Availability
Specifications

Molecular Weight (g/mol)	444.48
Color	White
Physical Form	Solid
Chemical Name or Material	Candesartan-d4
Grade	Research
SMILES	[2H]C1=C(CN2C(C(C(O)=O)=CC=C3)=C3N=C2OCC)C([2H])=C([2H])C(C4=CC=CC=C4C5=NNN=N5)=C1[2H]
Percent Purity	98.85%
CAS	1346604-70-3
Synonym	CV-11974-d4
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	C₂₄H₁₆D₄N₆O₃
Formula Weight	444.48

MMAE-d8, MedChemExpress

MedChemExpress MMAE-d8 (Monomethyl auristatin E-d8) is a deuterated labeled MMAE, a potent mitotic inhibitor and a tubulin inhibitor.

Pricing and Availability
Specifications

Molecular Weight (g/mol)	726.03
Color	White
Physical Form	Solid
Chemical Name or Material	MMAE-d8
Grade	Research
SMILES	CC[C@H](C)[C@@H]([C@@H](CC(N1[C@@H](CCC1)[C@@H]([C@@H](C)C(N[C@H](C)[C@@H](O)C2=CC=CC=C2)=O)OC)=O)OC)N(C([C@@](C(C([2H])([2H])[2H])(C([2H])([2H])[2H])[2H])([2H])NC([C@H](C(C)C)NC)=O)=O)C
For Use With (Application)	Cancer-programmed cell death
Percent Purity	98.43%
CAS	2070009-72-0
Solubility Information	DMSO : 100 mg/mL (137.74 mM; Need ultrasonic)
Synonym	Monomethyl auristatin E-d8 Deuterated labeled MMAE
Purity Grade Notes	Research
Recommended Storage	Powder -20°C 3 years, 4°C 2 years∣The compound is unstable in solutions, freshly prepared is recommended.
Shelf Life	Powder -20°C 3 years, 4°C 2 years∣The compound is unstable in solutions, freshly prepared is recommended.
Molecular Formula	C₃₉H₅₉D₈N₅O₇
Formula Weight	726.03

(±)-Levomepromazine-d6, MedChemExpress

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

Pricing and Availability

Quetiapine-d4 fumarate, MedChemExpress

MedChemExpress Quetiapine D4 fumarate is the deuterium labeled Quetiapine fumarate. Quetiapine fumarate is a 5-HT receptors agonist and a dopamine receptor antagonist. Antidepressant and anxiolytic effects.

Pricing and Availability

Doxercalciferol-d3, MedChemExpress

MedChemExpress Doxercalciferol-D3 is the deuterated form of Doxercalciferol, which is a Vitamin D2 analog that acts as a vitamin D receptor activator (VDRA).

Pricing and Availability
Specifications

Percent Purity	96.39%
Molecular Weight (g/mol)	415.67
Color	White
Physical Form	Solid
Chemical Name or Material	Doxercalciferol-d3
Grade	Research
SMILES	O[C@@H](C[C@H](O)C1)C(/C1=C([2H])\C=C2[C@@]3([H])[C@@](CCC\2)(C)[C@@H]([C@H](C)/C=C/[C@H](C)C(C)C)CC3)=C([2H])\[2H]
Purity Grade Notes	Research
Recommended Storage	-20°C, protect from light, stored under nitrogen∣The compound is unstable in solutions, freshly prepared is recommended.
Shelf Life	-20°C, protect from light, stored under nitrogen∣The compound is unstable in solutions, freshly prepared is recommended.
Molecular Formula	C₂₈H₄₁D₃O₂
Formula Weight	415.67

VD3-d6, MedChemExpress

MedChemExpress VD3-d6 (Vitamin D3-26,26,26,27,27,27-d6) is the deuterium labeled Vitamin D3; tools for determination of Vitamin D3 metabolites in human serum.

Pricing and Availability
Specifications

Molecular Weight (g/mol)	390.67
Color	Light Yellow
Physical Form	Solid
Chemical Name or Material	VD3-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])C)([H])[C@]3(C)CCC\2
For Use With (Application)	Neuroscience-Neuromodulation
Percent Purity	98.0%
CAS	118584-54-6
Solubility Information	DMSO : 100 mg/mL (255.97 mM; Need ultrasonic)
Synonym	Vitamin D3-26,26,26,27,27,27-d6
Purity Grade Notes	Research
Recommended Storage	-20°C, protect from light, stored under nitrogen∣The compound is unstable in solutions, freshly prepared is recommended.
Shelf Life	-20°C, protect from light, stored under nitrogen∣The compound is unstable in solutions, freshly prepared is recommended.
Molecular Formula	C₂₇H₃₈D₆O
Formula Weight	390.67

Alfacalcidol-d6, MedChemExpress

MedChemExpress Alfacalcidol-d6 is the deuterium labeled Alfacalcidol. Alfacalcidol is a non-selective VDR activator.

Pricing and Availability
Specifications

Molecular Weight (g/mol)	406.67
Color	White
Physical Form	Solid
Chemical Name or Material	Alfacalcidol-d6
Grade	Research
SMILES	O[C@H](C/1=C)C[C@H](O)CC1=C\C=C2[C@@](CC[C@@H]3[C@@H](CCCC(C([2H])([2H])[2H])C([2H])([2H])[2H])C)([H])[C@]3(C)CCC\2
For Use With (Application)	Metabolism-sugar/lipid metabolism
Percent Purity	98.0%
CAS	1641940-94-4
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	C₂₇H₃₈D₆O₂
Formula Weight	406.67

Isotope Standards

Isotope Standards

Lead 207 Isotope Standard for ICP/MS, SPEX CertiPrep™

Lead 206 Isotope Standard For ICP/MS, SPEX CertiPrep™

Enalaprilat-d5 sodium, MedChemExpress

Proguanil-d6, MedChemExpress

Omeprazole-d3, MedChemExpress

Nitazoxanide-d4, MedChemExpress

Mycophenolic acid-d3, MedChemExpress

Tetrabenazine-d6, MedChemExpress

Candesartan-d4, MedChemExpress

MMAE-d8, MedChemExpress

(±)-Levomepromazine-d6, MedChemExpress

Quetiapine-d4 fumarate, MedChemExpress

Doxercalciferol-d3, MedChemExpress

VD3-d6, MedChemExpress

Alfacalcidol-d6, MedChemExpress

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Isotope Standards

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