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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

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

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
2

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

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
4

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

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

Cambridge Isotope Laboratories N-Propanol (D8 98%) 1 g

N-Propanol (D8 98%) 1 g

ENCOMPASS
6

WELLINGTON LABORATORIES LLC ISOTOPE PERFORMANCE STANDARD P
SDP

NC2588562 ISOTOPE PERFORMANCE STANDARD P

ENCOMPASS
7

Cerilliant Corporation COCAETHYLENE-D8(BENZOYLECG,1ML

Cocaethylene-D8 (Benzoylecgonine ethyl ester-D8), 100 μg/mL

ENCOMPASS
8

Sigma Organic Chemistry Cerilliant (±)-Epinephrine-D6 Solution, Certified Reference Material, 100 µg/mL, 1 mL

(±)-Epinephrine-D6 solution is a certified reference material used as an internal standard for the quantification of catecholamine levels in clinical samples. It is suitable for diagnostic testing in endocrinology, specifically for monitoring markers associated with pheochromocytoma, paraganglioma, and neuroblastoma via LC-MS/MS or GC-MS techniques.

  • Provided as a 100 μg/mL single component solution in methanol with 5% 1 M HCl.
  • Supplied in a 1 mL ampule for convenient use.
  • Features Snap-N-Spike technology for reliable analytical performance.
  • Suitable for both liquid chromatography and gas chromatography applications.
  • Requires storage at −70°C in an ultra freezer.

ENCOMPASS
9

eMolecules​ 557794-38-4 | Medchem Express | Dapsone-d8 | 1mg | 673359086 | HY-B0688S | MFCD03701158 | 256.35 | C12H12N2O2S

Medchem Express | Dapsone-d8 | 1mg | 673359086 | HY-B0688S | 557794-38-4 | MFCD03701158 | 256.350 | C12H12N2O2S

ENCOMPASS_PREFERRED
10

eMolecules​ 349554-00-3 | Medchem Express | Enalaprilat-d5 | 1mg | 415688613 | HY-B0231AS | MFCD06656364 | 353.43 | C18H24N2O5

Pharmablock | 6-formylpyridine-2-carbonitrile | 25mg | 689239304 | PBP11023 | 85148-95-4 | MFCD01108768 | 132.122 | C7H4N2O

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eMolecules Building Block Tool

ENCOMPASS_PREFERRED
11

Cayman Chemical 3-CholIc AcId-d4 500ug

An internal standard for the quantification of 3β-cholic acid by GC- or LC-MS

ENCOMPASS_PREFERRED
12

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
13

eMolecules​ 1189480-47-4 | Medchem Express | Hydroxyzine D8 | 1mg | 533803403 | HY-B0548S1 | MFCD09840787 | 382.96 | C21H27ClN2O2

ChemScene | 2-Bromo-4-chloro-3-fluoroaniline | 100mg | 673264354 | CS-0146364 | 1253889-54-1 | MFCD30829189 | 224.460 | C6H4BrClFN

If you are unable to find the chemical you are looking for, make sure you are logged into your fishersci.com account and click on the following link:
eMolecules Building Block Tool

ENCOMPASS_PREFERRED
14

Medchemexpress LLC LEUKOTRIENE A4 HYDRO 100UG
SDP

5000175960 LEUKOTRIENE A4 HYDRO 100UG

ENCOMPASS_PREFERRED
15

Cayman Chemical ω-Muricholic Acid-d4, Purity: ≥99% deuterated forms (d1-d4), 1 mg

An internal standard for the quantification of ω-MCA by GC- or LC-MS

ENCOMPASS_PREFERRED