Isotope Standards
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]
Sigma Aldrich Fine Chemicals Biosciences Cocaethylene-D8 solution 1
An analog of benzoylecgonine cocaethylene is a metabolite of cocaine formed in the presence of ethanol. This stable-labeled internal standard is suitable for quantitation of cocaethylene levels in urine blood and saliva by LC/MS or GC/MS for urine drug testing clinical toxicology forensic analysis or isotope dilution methods.
Cambridge Isotope Laboratories Formaldehyde (13C, 99%) (~20% W/W IN H2O), 1.2ml
Formaldehyde (13C, 99%) (~20% W/W IN H2O), 3228-27-1, CH2O, 31.02, 1.2ml
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.
Medchemexpress LLC MMAD-d8 | 203849-91-6 | 99.0% | 779.11 | C41H58D8N6O6S | 10 MG
MMAD-d8 is the deuterated form of monomethyl dolastatin 10 (MMAD), a potent microtubule-disrupting agent provided for research use. It is used primarily as a cytotoxic payload in antibody-drug conjugate (ADC) development and for tracer or stability studies where deuteration improves analytical utility. The compound is supplied as a solid powder and is unstable in solution, so solutions should be prepared immediately before use.
![Medchemexpress LLC Glycine, S-[(1R,2E,4E,6Z,9Z)-1-[(1S)-4-carboxy-1-hydroxybutyl]-2,4,6,9-pentadecatetraen-1-yl-14 | 1240398-17-7 | 98.4% | 501.69 | 25 UG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000439930-Logo.png-250.jpg){kind=logo}
Medchemexpress LLC Glycine, S-[(1R,2E,4E,6Z,9Z)-1-[(1S)-4-carboxy-1-hydroxybutyl]-2,4,6,9-pentadecatetraen-1-yl-14 | 1240398-17-7 | 98.4% | 501.69 | 25 UG
Leukotriene D4-d5 is a deuterium-labeled stable isotope.
- Colorless to light yellow liquid appearance
- Purity of 98.4% (HPLC)
- Store as a solution at -20°C for up to 2 years
Medchemexpress LLC Leukotriene E4 | 75715-89-8 | 99.8% | 439.61 | 25 UG
Leukotriene E4 (LTE4) is produced by the action of dipeptidase on LTD4. It is a constituent of slow-reacting substance of anaphylaxis (SRS-A) and accumulates in both plasma and urine. Urinary excretion of Leukotriene E4 is often used as an indicator of asthma.
- Appearance: Liquid
- Color: Colorless to light yellow
- Human endogenous metabolite
- Solution storage at -20°C for 2 years
- Ships at room temperature in continental US
Medchemexpress LLC Imidacloprid | 138261-41-3 | 98.5% | 1 ML
Imidacloprid is an effective neonicotinoid pesticide used for pest control in cereals, vegetables, tea, and cotton. It is intended for research use only and not for sale to patients.
- Molecular weight: 255.66
- Formula: C9H10ClN5O2
- Appearance: Solid
- Color: White to off-white
- Solution storage: -80°C for 2 years or -20°C for 1 year
- Shipping: Room temperature (continental US)
Medchemexpress LLC Osimertinib-d6 | 1638281-44-3 | MFCD00056410 | 99.6% | 505.64 g/mol | C28H27D6N7O2 | 10 MG
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.