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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

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

CAS: 7439-92-1 Molecular Formula: Pb Molecular Weight (g/mol): 207.20 MDL Number: MFCD00134050 InChI Key: WABPQHHGFIMREM-UHFFFAOYSA-N PubChem CID: 5352425 ChEBI: CHEBI:27889 IUPAC Name: lead SMILES: [Pb]

PubChem CID 5352425
CAS 7439-92-1
Molecular Weight (g/mol) 207.20
ChEBI CHEBI:27889
MDL Number MFCD00134050
SMILES [Pb]
IUPAC Name lead
InChI Key WABPQHHGFIMREM-UHFFFAOYSA-N
Molecular Formula Pb
2

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

3

Boron 11 Isotope Standard For ICP/MS, 10μg/mL in H20, SPEX CertiPrep™
SDP

CAS: 7440-42-8 Molecular Formula: B Molecular Weight (g/mol): 10.81 MDL Number: MFCD00134034 MFCD00151272 InChI Key: ZOXJGFHDIHLPTG-UHFFFAOYSA-N PubChem CID: 5462311 ChEBI: CHEBI:27560 IUPAC Name: boron SMILES: [B]

PubChem CID 5462311
CAS 7440-42-8
Molecular Weight (g/mol) 10.81
ChEBI CHEBI:27560
MDL Number MFCD00134034 MFCD00151272
SMILES [B]
IUPAC Name boron
InChI Key ZOXJGFHDIHLPTG-UHFFFAOYSA-N
Molecular Formula B
4

Lithium 6 Isotope Standard For ICP/MS, SPEX CertiPrep™
SDP

CAS: 7439-93-2 Molecular Formula: Li Molecular Weight (g/mol): 6.94 MDL Number: MFCD00134051 InChI Key: WHXSMMKQMYFTQS-UHFFFAOYSA-N PubChem CID: 3028194 ChEBI: CHEBI:30145 IUPAC Name: lithium SMILES: [Li]

PubChem CID 3028194
CAS 7439-93-2
Molecular Weight (g/mol) 6.94
ChEBI CHEBI:30145
MDL Number MFCD00134051
SMILES [Li]
IUPAC Name lithium
InChI Key WHXSMMKQMYFTQS-UHFFFAOYSA-N
Molecular Formula Li
5

WELLINGTON LABORATORIES LLC ISOTOPE PERFORMANCE STANDARD P
SDP

NC2588562 ISOTOPE PERFORMANCE STANDARD P

ENCOMPASS
6

Sigma Organic Chemistry SIGMA ORGANIC CHEMISTRY

NC4042888 EPINEPHRINE-D6 SOLUTION 1ML

ENCOMPASS_PREFERRED
7

BROADPHARM MMAE 100MG

NC2411024 MMAE 100MG

ENCOMPASS
8

ENTEGRIS INC TAURODEOXYCHOLIC ACID-D4-3-S

NC2739543 TAURODEOXYCHOLIC ACID-D4-3-S

ENCOMPASS_PREFERRED
9

VECTOR LABORATORIES LLC IGG2 ISOTOPE CONTROL

NC3355894 IGG2 ISOTOPE CONTROL

ENCOMPASS
10

SANTA CRUZ BIOTECHNOLOGY FURFURAL-D4 25MG
SDP

NC3359014 FURFURAL-D4 25MG

ENCOMPASS
11

LEINCO TECHNOLOGIES INC HUMAN IGG2 ISOTOPE CONTROL
SDP

NC3482431 HUMAN IGG2 ISOTOPE CONTROL

ENCOMPASS_PREFERRED
12

SANTA CRUZ BIOTECHNOLOGY 1 4-DIBROMOBUTANE-D8
SDP

NC3726910 1 4-DIBROMOBUTANE-D8

ENCOMPASS
13

Medchemexpress LLC Omeprazole-d3-1 | 934293-92-2 | 95.1% | C17H16D3N3O3S | 1 MG
SDP

Omeprazole-d3-1 is a deuterium-labeled form of Omeprazole, a proton pump inhibitor (PPI) used for treating acid-related gastrointestinal disorders. It is also a potent brain-penetrant neutral sphingomyelinase (N-SMase) inhibitor.

  • Competitively inhibits CYP2C19 activity with a Ki of 2 to 6 μM.
  • Inhibits the growth of Gram-positive and Gram-negative bacteria.
  • Can be used as a tracer in research.
  • Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.

ENCOMPASS_PREFERRED
14

Medchemexpress LLC Osimertinib-d6 | 1638281-44-3 | MFCD00056410 | 99.6% | 505.64 g/mol | C28H27D6N7O2 | 10 MG
SDP

Osimertinib-d6 is a deuterium-labeled analogue of osimertinib supplied as an analytical standard for research and quantitative mass spectrometry applications. It provides a defined mass shift relative to the parent drug that enables accurate internal standardization in LC-MS and bioanalytical assays.

  • Deuterium-labeled internal standard for quantitative LC-MS and LC-MS/MS assays.
  • Provides a mass-shifted analogue of osimertinib for accurate quantification.
  • High purity (~99.6%), supporting reliable analytical results.
  • Supplied as a solid with recommended storage protected from light at 4°C; in solution store -80°C (6 months) or -20°C (1 month).
  • DMSO stock preparation: 125 mg/mL (247.21 mM) with warming and sonication as needed.

ENCOMPASS_PREFERRED
15

Cambridge Isotope Laboratories Simazine (ring-13C3 99%) 100 ug/mL in acetonitrile 1 2 mL

Simazine (ring-13C3 99%) 100 ug/mL in acetonitrile 1 2 mL

ENCOMPASS