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Isotopically Labeled Compounds

Chemicals to which isotopes have been attached in order to label specific atoms. Isotopically labeled compounds are commonly used in synthetic chemistry, characterization techniques such as NMR, and biology.

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1

Sigma Aldrich Nonadecane

MilliporeSigma Sigma Organics products encompass a wide range of quality reagents, solvents, catalysts, and building blocks for organic synthesis. From benchtop discovery to process development and scale-up, Sigma Organics solutions are built to meet the needs of synthetic chemists.

ENCOMPASS
Boiling Point 330°C (lit.)
Percent Purity 99%
Linear Formula CH3(CH2)17 CH3
CAS 629-92-5
Molecular Weight (g/mol) 268.52
MDL Number MFCD00009012
RTECS Number 211-116-8
Recommended Storage Room Temperature
Molecular Formula C19H40
Density 0.786 g/mL (at 25°C (literature))
Melting Point 30°C to 34°C (lit.)
2

Medchemexpress LLC Sphingosine kinase 1 (SPHK1) protein, human (Sf9, 363 a.a.) | >90.0% | 10UG
SDP

Recombinant human sphingosine kinase 1 (SPHK1), 363 amino acids, produced in Sf9 insect cells. Supplied as a tag-free, 0.22 μm filtered solution in 50 mM HEPES pH 7.5, 200 mM NaCl, 20% glycerol, 1 mM DTT. Intended for biochemical assays and enzymology; shipped on dry ice and recommended for storage at -80 °C.

  • Recombinant human protein expressed in Sf9 insect cells.
  • 363 amino acids, approximately 40.3 kDa molecular weight.
  • Tag-free formulation suitable for functional and binding assays.
  • Purity >90.0% as determined by reducing SDS-PAGE.
  • Supplied in stabilized buffer with glycerol and DTT to preserve activity.
  • Shipped on dry ice; store at -80 °C and avoid repeated freeze-thaw cycles.
  • Available in multiple size options to suit assay scale.

ENCOMPASS_PREFERRED
3

Revvity Health Sciences Inc EasyTag EXPRESS35S Protein Labeling Mix, [35S]-, 7mCi

EasyTag EXPRESS35S Protein Labeling Mix, [35S]-, 7mCi

ENCOMPASS
4

Revvity Health Sciences Inc EasyTag EXPRESS35S Protein Labeling Mix, [35S]-, 2mCi

EasyTag EXPRESS35S Protein Labeling Mix, [35S]-, 2mCi

ENCOMPASS
5

Revvity Health Sciences Inc EasyTag EXPRESS35S Protein Labeling Mix, [35S]-, 14mCi

EasyTag EXPRESS35S Protein Labeling Mix, [35S]-, 14mCi

ENCOMPASS
6

Revvity Health Sciences Inc EXPRE35S35S Protein Labeling Mix, [35S]-, 7mCi (259MBq), 50mM Tricine (pH 7.4), 10mM 2-mercaptoethanol

EXPRE35S35S Protein Labeling Mix, [35S]-, 7mCi (259MBq), 50mM Tricine (pH 7.4), 10mM 2-mercaptoethanol

ENCOMPASS
7

Revvity Health Sciences Inc EXPRE35S35S Protein Labeling Mix, [35S]-, 14mCi (518MBq), 50mM Tricine (pH 7.4), 10mM 2-mercaptoethanol

EXPRE35S35S Protein Labeling Mix, [35S]-, 14mCi (518MBq), 50mM Tricine (pH 7.4), 10mM 2-mercaptoethanol

ENCOMPASS
8

Revvity Health Sciences Inc EXPRE35S35S Protein Labeling Mix, [35S]-, 2mCi (74MBq), 50mM Tricine (pH 7.4), 10mM 2-mercaptoethanol

EXPRE35S35S Protein Labeling Mix, [35S]-, 2mCi (74MBq), 50mM Tricine (pH 7.4), 10mM 2-mercaptoethanol

ENCOMPASS
9

Medchemexpress LLC TCEP-d16 hydrochloride | 1174025-33-2 | 97.0% | 302.75 | 1 MG
SDP

TCEP-d16 hydrochloride is a deuterium-labeled version of TCEP hydrochloride, a stable non-thiol reducing agent. It performs faster S-S reductive reactions and selectively reduces protein disulfides without altering protein properties or interacting with thiol-directed agents. It is also commonly used in DNA/AuNP chemistry.

  • Deuterium labeled: Used as a tracer in drug development, potentially influencing pharmacokinetic and metabolic profiles.
  • Non-thiol reducing agent: Offers greater stability and faster S-S reductive reactions compared to other chemical reductants.
  • Selective reduction: Reduces protein disulfides without affecting protein properties or interacting with thiol-directed agents.
  • Applications: Can be used as a tracer or internal standard for quantitative analysis by NMR, GC-MS, or LC-MS, and in DNA/AuNP chemistry.

ENCOMPASS_PREFERRED
10

Medchemexpress LLC 4-Nonylphenol-d5 | 358730-95-7 | 99.2% | C15H19D5O | 10MG
SDP

4-Nonylphenol-d5 is the deuterium-labeled analogue of 4-nonylphenol supplied as a solid analytical standard for research use. It is intended for use as a tracer and internal standard in quantitative analyses and is suitable for environmental and analytical chemistry workflows.

ENCOMPASS_PREFERRED
11

Medchemexpress LLC Tcep-d16 hydrochloride | 1174025-33-2 | 97.0% | 302.75 | 5 MG
SDP

TCEP-d16 (hydrochloride) is the deuterium labeled TCEP hydrochloride. TCEP hydrochloride (Tris(2-carboxyethyl)phosphine hydrochloride) is a non-thiol reducing agent that is more stable and produces a faster S-S reductive reaction than other chemical reductants. TCEP hydrochloride is a trialkylphosphine, selectively reduces protein disulfides without altering the properties or interacting with thiol-directed agents in the reaction mixture. TCEP hydrochloride is also a commonly used reducing agent in the DNA/AuNP chemistry.

  • Can be used as a tracer
  • Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS

ENCOMPASS_PREFERRED
12

Medchemexpress LLC 1-bromoheptane-d5 | 1219805-66-9 | 95.0% | 184.13 g·mol⁻¹ | C7H10D5Br | 25 MG
SDP

1-Bromoheptane-d5 (CAS 1219805-66-9) is the deuterium-labeled analogue of 1-bromoheptane supplied as a research reagent and reference standard. It is used in analytical chemistry, mass spectrometry, tracer studies, and synthetic chemistry where isotopic labeling enables accurate quantification and tracking.

  • Deuterium-labeled (d5) to enable mass-differentiation in MS analyses.
  • Suitable as an internal standard for quantitative assays.
  • Liquid, ready for use in synthetic and analytical workflows.
  • Molecular formula C7H10D5Br and molecular weight 184.13 g·mol⁻¹.
  • Available in small pack sizes appropriate for research use.

ENCOMPASS_PREFERRED
13

Medchemexpress LLC 1-Butynylbenzene-d5 | 1219803-38-9 | 135.22 g/mol | C10H5D5 | 10 MG
SDP

1-Butynylbenzene-d5 is the deuterium-labeled analogue of 1-butynylbenzene provided as an isotope-labeled reagent for research use. It contains an alkyne functional group and is suitable for copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it useful in analytical workflows and synthetic click chemistry applications.

  • Deuterium-labeled for tracer and isotope studies.
  • Contains an alkyne group compatible with CuAAC click chemistry.
  • Useful as an internal standard in analytical quantitation.
  • Molecular formula C10H5D5 and molecular weight 135.22 g/mol.
  • Storage: pure form -20°C (up to 3 years); in solvent -80°C (6 months) or -20°C (1 month).

ENCOMPASS_PREFERRED
14

Medchemexpress LLC 1-Butynylbenzene-d5 | 1219803-38-9 | 135.22 g/mol | C10H5D5 | 50 MG
SDP

1-Butynylbenzene-d5 is a deuterium-labeled alkyne reagent intended for research use. It is designed for synthetic and analytical applications, including click chemistry and use as an internal standard in mass spectrometry or chromatography. The compound provides a stable isotope label to assist in tracing, quantification, and method development.

ENCOMPASS_PREFERRED
15

Medchemexpress LLC Propanoic-13C sodium | 62601-06-3 | MFCD00002758 | 99.6% | 97.05 g/mol | 13C C3H5NaO2 | 10 MG
SDP

Sodium propionate labeled with 13C is the isotopically labeled sodium salt of propionic (propanoic) acid supplied for use as a tracer or internal standard in analytical chemistry (NMR, GC-MS, LC-MS). It is provided as a white solid for research use only and should be stored sealed, away from moisture and light.

ENCOMPASS_PREFERRED