Tolcapone

SKU:BHB11900319
Suppliers
StressMarq Biosciences Inc.
StressMarq Biosciences Inc.
Details Products
Overview
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Tolcapone is a research-grade small-molecule inhibitor of COMT supporting Neuroscience and Neurodegeneration research. Supplied as a yellow powder with >98% purity (CAS 134308-13-7, MW 273.2) soluble in DMSO, or ethanol; store at -20°C. For research use only.
Cas No. 134308-13-7
Molecular Formula C14H11NO5
Purity >98% (TLC); NMR (Conforms)
Application Notes COMT inhibitor
Options selector
Catalog no. Size
SIH-540-10MG 10 mg
SIH-540-50MG 50 mg
Available Options

Select the variant that best fits your experiment. Availability and lead time may vary by option.

  • Options: Size (2) — 10 mg, 50 mg.
  • Lead time: options listed as “in stock at manufacturer” typically ship in 2-3 business days; other statuses may take longer.
  • Storage: -20ºC
  • Shipping: ships at ambient temperature.
  • Upon receipt: store at the recommended temperature as soon as possible.
  • Sales terms and conditions: Please review prior to ordering.
Field Specification
Mfr No SIH-540
Activity
  • Inhibitor
Alternative Names (3,4-dihydroxy-5-nitrophenyl)-(4-methylphenyl)methanone, Tolcapone, Tasmar, Ro 40-7592
Cas No. 134308-13-7
Form Yellow powder
Molecular Weight 273.2
Product Type
  • Biochemicals
  • Small Molecules
Purity >98% (TLC); NMR (Conforms)
Shipping Shipped Ambient
SMILES Cc1ccc(cc1)C(=O)c2cc(O)c(O)c(c2)[N+]([O-])=O
Solubility Soluble in DMSO (25 mg/ml), or ethanol (25 mg/ml)
Source Synthetic
Storage -20ºC

Tolcapone is a potent catechol-O-methyltransferase (COMT) inhibitor that enhances dopaminergic signaling by preventing dopamine degradation. It is clinically used in Parkinson’s disease and has demonstrated neuroprotective effects by inhibiting alpha-synuclein and beta-amyloid aggregation. Tolcapone also binds transthyretin (TTR), stabilizing it and preventing TTR-induced cytotoxicity. These multifaceted actions make Tolcapone a valuable compound in neurodegenerative disease research, particularly in Parkinson’s and Alzheimer’s disease models.

Classification: Not WHMIS controlled

Hazard statement(s):

  • H303 - May be harmful if swallowed.
  • H400 - Very toxic to aquatic life.
  • Precautionary statement(s)
  • P273 Avoid release to the environment.

Tolcapone (StressMarq Biosciences Inc., Victoria BC CANADA, Catalog # SIH-540)

Need this compound in a format that drops straight into your assay? We can tailor formulation, chemistry, and documentation so your results stay consistent across runs and re-orders.

  • Format options: solid or pre-dissolved solution (choose solvent), target concentration, aliquots, light/moisture-protected packaging
  • Chemistry options: free base/acid vs salt forms, hydrate/solvate preference, stereoisomer control (single enantiomer or racemate), close analogs
  • Add-on labels & handles: D/¹³C/¹⁵N isotopes (LC-MS/internal standards), azide/alkyne or other functional handles for conjugation
  • QC & documentation: standard COA or enhanced analytical pack (HPLC/LC-MS/NMR), chiral purity, residual solvents, water content (KF), method-specific specs
  • Scale & continuity: mg to gram scale, bulk pricing, lot reservation, repeat-order continuity

To quote quickly, tell us: compound name + CAS/structure (SMILES or mol file), intended assay context, solvent preference, salt/stereochemistry requirements, purity/QC level, and the amount (mg–g).

Can’t find the compound you’re looking for?
Send the CAS or structure and your specs. We can help source it, suggest close equivalents, or discuss custom synthesis with the right QC documentation (RUO).

1. PT Manisto et al. Br. J. Pharmacol. 1992 105:569
2. S Di Giovanni et al. J. Biol. Chem. 2010 285:14941
3. R Sant’Anna et al. Nat. Commun. 2016 7:10787
4. SC Forester and JD Lambert J. Funct. Foods 2015 17:183

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