Pyridines and derivatives
Medchemexpress LLC Phosphatidylcholines, egg | 97281-44-2 | 99.8% | Mixture; no single chemical formula | 10MG
Phosphatidylcholines, egg is an egg-derived mixture of phosphatidylcholine lipids provided for research use. It is used as a natural phospholipid source in studies of membrane structure, lipid metabolism, intestinal lipid absorption, and neuroprotection. The material is a solid (white to off-white) and is supplied with manufacturer certificate of analysis and safety documentation; recommended storage is -20°C for long-term stability.
Medchemexpress LLC TLCK-treated chymotrypsin | 2594868 | 25,666 Da | Not applicable - protein (no simple chemical formula) | 5 MG
TLCK-treated chymotrypsin is a serine protease preparation treated with Nα-tosyl-L-lysine chloromethyl ketone (TLCK) to inactivate residual trypsin activity. It digests proteins at the carboxyl side of aromatic amino acids and is supplied as a solid enzyme preparation for proteolytic workflows, peptide mapping, and enzymology studies.
- Serine protease that cleaves at the carboxyl side of aromatic residues.
- Treated with TLCK to minimize residual trypsin activity.
- Specific activity ≥45 U/mg protein for consistent proteolytic performance.
- White to off-white solid, suitable for storage and handling per datasheet instructions.
- Applicable to protein digestion, peptide mapping, and enzymology assays.
Medchemexpress LLC Caramel | 8028-89-5 | MFCD00146294 | 99.0% | Composition complex and indefinite (no single chemical formula) | 1 G
Caramel is a biochemical reagent used as an organic compound or biological material in life-science research. Supplied as a brown-to-black solid in research-scale quantities, it is typically employed in biochemical assays, formulation studies, and applications that require a complex carbohydrate-derived colorant or melanoidin-containing material.
- Brown-to-black solid appearance suitable for assay use.
- Available in small research quantities to support laboratory studies.
- Composition is complex and indefinite, characteristic of caramel colors.
- Recommended storage: 4°C, protect from light; solvent stability varies.
Medchemexpress LLC Fluorescein isothiocyanate-dextran | 60842-46-8 | MFCD00131092 | 500,000 | No fixed chemical formula (polymeric conjugate) | 5 MG
FITC-Dextran (MW 500000) is a fluorescein isothiocyanate-labeled dextran polymer used as a fluorescent tracer in biological research. It is employed to study permeability, diffusion, and tissue labeling where a large, water-soluble fluorescent marker is required. The product is supplied as a yellow-orange solid and is soluble in water with sonication.
- Average molecular weight 500,000 for large-molecule tracking.
- Bright fluorescein fluorescence (Ex 495 nm; Em 525 nm).
- Water soluble; may require ultrasonication to dissolve.
- Yellow to orange solid for easy visual identification.
- Store protected from light; solution storage at low temperatures extends stability.
Medchemexpress LLC Leishman's stain | 12627-53-1 | MFCD00131498 | 100.0% | Mixture (Romanowsky-type stain); no single chemical formula | 1 G
Leishman's stain is a Romanowsky-type histological dye used to stain peripheral blood and bone marrow smears for hematological and microscopic examination. Stained cells range from pale bluish-grey to deep blue under oil-immersion, enabling clear morphological differentiation of blood cell components.
- Suitable for peripheral blood and bone marrow smears.
- Yields pale bluish-grey to deep blue staining under oil-immersion.
- Provided as a solid for preparation of staining solutions.
- Store at 4°C and protect from light for stability.
- Available in multiple package sizes to suit laboratory needs.
Medchemexpress LLC Cephalin form bovine brain | 90989-93-8 | MFCD00065961 | 98.0% | Mixture - no single chemical formula (natural phospholipid mixture) | 50 MG
Cephalin form bovine brain is a bovine-derived phosphatidylethanolamine used as a biochemical reagent for cell biology and lipid research. It participates in autophagosome membrane formation and is reported to enhance autophagic flux, promote cell differentiation, regulate lipid droplet fusion, and influence membrane integrity. The product is supplied as a purified natural phospholipid preparation for laboratory research.
- High purity (98.0%) natural phospholipid preparation.
- Useful for studies of autophagy and autophagosome membrane formation.
- Promotes cell differentiation and regulates lipid droplet fusion.
- Provided in a 50 mg pack for laboratory use.
- Intended for research use only; not for human or clinical use.
- Documentation available: data sheet, COA, SDS, handling instructions.
Medchemexpress LLC Iron dextran | 9004-66-4 | 35-40% | No defined chemical formula (polymeric iron-dextran complex) | 1 G
Iron dextran (Fe 35-40% w/w) is a polymeric iron-dextran complex supplied for laboratory research. It serves as an iron-containing biochemical reagent for assays and biological studies where a soluble iron source is required. Product documentation includes a safety data sheet and storage recommendations for research use only.
- Iron content 35-40% w/w.
- Polymeric iron-dextran complex with no single defined formula.
- Intended for life-science research and biochemical assays.
- Available in research pack sizes, including 1 g.
- Safety data sheet and handling instructions provided.
- Relative density approximately 1.17 g/cm3.
Medchemexpress LLC Manganese peroxidase | 114995-15-2 | MFCD03792385 | 39,557 Da (≈39.6 kDa) | Not applicable - enzyme/protein (no single chemical formula) | 5 MG
Manganese peroxidase is a heme-containing oxidative enzyme that catalyzes the oxidation of Mn2+ to Mn3+. It participates in lignin depolymerization and is used in laboratory research on biodegradation and environmental remediation, including dye wastewater decolorization. Supplied as a lyophilized powder for research use.
- Heme-containing enzyme that oxidizes Mn2+ to Mn3+.
- Facilitates lignin depolymerization for biomass and paper research.
- Applicable to biodegradation and environmental contaminant removal.
- Useful for dye wastewater decolorization and remediation studies.
- Provided as lyophilized powder suitable for storage and reconstitution.
Medchemexpress LLC Phosphatidylglycerols (egg) sodium salt | 383907-64-0 | MFCD00213550 | >99.0% | 782.284 | Mixture - no single chemical formula (natural egg phosphatidylglycerols) | 50 MG
Phosphatidylglycerols (egg) sodium salt is a naturally derived mixture of anionic phospholipids from egg yolk for research use. It modulates innate immune signaling (CD14/MD-2-TLR4), can inhibit LPS- and virus-mediated inflammatory responses, and is supplied as the sodium salt to aid dispersion in aqueous systems.
- Natural mixture with variable fatty acid composition.
- Acts as an anionic phospholipid modulator of innate immune signaling.
- Shown to inhibit LPS- and virus-mediated inflammatory pathways.
- Sodium salt form for enhanced aqueous dispersibility.
- Available in research-scale quantities suitable for in vitro and in vivo studies.
- High purity typical of research-grade lipid preparations.
Medchemexpress LLC Alkali lignin | 8068-05-1 | MFCD09039274 | ≥98.0% | 10,000-14,200 Da | No single defined chemical formula (complex, polydisperse polymer) | 5 G
Lignin alkali is a high-purity alkali lignin supplied as a biochemical reagent for life-science and materials research. It is a heterogeneous, polydisperse aromatic polymer derived from lignocellulosic biomass and is provided as a solid reagent for assay development, surface modification, and polymer studies. The material is offered in laboratory pack sizes with supporting documentation for safe handling and characterization.
- High purity (≥98.0%).
- Heterogeneous, polydisperse polymeric structure suitable for material studies.
- Suitable for biochemical assays and surface or polymer modification research.
- Available in 5 g, 10 g, 25 g, and 50 g pack sizes.
- Recommended sealed storage at 4°C; in solvent: -80°C (6 months) or -20°C (1 month).
- Supplied with certificate of analysis and safety data sheet documentation.
Medchemexpress LLC Blue dextran | 87915-38-6 | MFCD00130661 | 2,000,000 Da | Not applicable (polymeric; no single chemical formula - repeat unit: (C6H10O5)n) | 500 MG
Blue dextran (MW 2,000,000) is a high-molecular-weight, water-soluble dextran conjugated to a blue chromophore used as an inert tracer and molecular-weight marker in laboratory research. Supplied as a blue powder, it is commonly used for column calibration, permeability and diffusion studies, and as a size-exclusion chromatography standard. Intended for research use only.
- High molecular weight (2,000,000 Da).
- Water-soluble blue powder.
- Useful as a void-volume marker and size-exclusion chromatography standard.
- Suitable for permeability, diffusion, and tracer studies.
- Degree of substitution typically around 0.10-0.12 mmol dye per gram of dextran.
- Supplied for research use only.
- Available in 500 mg and larger pack sizes.
Medchemexpress LLC The chemical/IUPAC name is not explicitly listed in the manufacturer's datasheet (SDS). | 1861449-70-8 | MFCD31657327 | 98.2% | 611.79 g/mol | C37H46FN5O2 | 50 MG
ATM-3507 is a small-molecule tropomyosin inhibitor provided for research use. It has reported activity in human melanoma cell lines with IC50 values in the low micromolar range and is supplied as a high-purity research reagent intended for cell-based and cytoskeleton studies.
- High purity (98.16%).
- Molecular weight 611.79 g/mol.
- Chemical formula C37H46FN5O2.
- Reported activity in human melanoma cell lines (IC50 3.83-6.84 μM).
- Suitable for cell-based and cytoskeleton studies.
- Supplied with supporting documentation (COA and SDS).
- Intended for research use only.
Medchemexpress LLC Ovalbumin | 9006-59-1 | MFCD00804581 | 98.1% | 42,881 Da (≈42.9 kDa) | Not applicable (protein - no single chemical formula) | 100 MG
Ovalbumin (OVA) is the main protein found in egg white, provided as a purified solid reagent for biochemical and immunological research. It is commonly used as an antigen for immunization, an ELISA standard, and a reagent in protein assays.
- Purity: 98.1% (batch certificate of analysis).
- Appearance: white to light yellow solid.
- Solubility: soluble in water at ≥100 mg/mL.
- Intended uses: suitable for immunization, ELISA standards, and biochemical assays.
- Origin: chicken egg protein (CAS 9006-59-1).
- Packaging: 100 MG single package.
Medchemexpress LLC PNU-74654 (no explicit chemical/IUPAC name on product page) | 113906-27-7 | 99.9% | 320.34 g/mol | C19H16N2O3 | 100 MG
PNU-74654 is a small-molecule inhibitor of the Wnt/β-catenin signaling pathway that disrupts β-catenin/TCF interactions and modulates downstream signaling in cell-based assays (cell-based IC50 129.8 μM in NCI-H295 cells). Supplied as a high-purity solid for research use.
- Inhibits β-catenin/TCF interaction in biochemical and cell assays.
- Reduces nuclear β-catenin accumulation and downstream target expression.
- Decreases cell proliferation and induces apoptosis in relevant cell lines.
- High purity suitable for research applications.
- Soluble in DMSO at 100 mg/mL for preparation of stock solutions.
- Powder stable at -20°C for long-term storage; short-term storage at 4°C.