See the DrugPatentWatch profile for Monomethyl
Which companies make monomethyl fumarate (MMF) impurities in the USA?
I don’t have any provided, verifiable sources listing specific US-based manufacturers of “monomethyl fumarate impurity” materials (such as individual impurity isomers/metabolites) or their supplier names. Without that information, I can’t accurately name manufacturers.
What usually qualifies as a “monomethyl fumarate impurity” (and why listings are hard)
In practice, “monomethyl fumarate impurities” usually means one or more specific impurities defined in a drug’s regulatory filings (e.g., specific related substances/impurity standards), not a single, universally traded chemical. Supplier availability depends on:
- The exact impurity name or structure (a particular related substance vs. a generic impurity mixture).
- The intended use (analytical reference standard vs. process impurity for R&D).
- The regulatory framework the vendor supports (USP/ICH reference standards, CoA, GMP grade, etc.).
How to find US suppliers fast (what to search for)
If you’re trying to source a specific monomethyl fumarate impurity standard in the US, the fastest path is to search by:
- “Monomethyl fumarate related compound” + the exact impurity label (e.g., “Impurity A/B”, “specified related substance”, or the chemical name).
- “MMF impurity reference standard” + “GMP” or “analytical standard” depending on your use.
- “CAS number” for the impurity (if you have it). Many supplier pages are indexed by CAS more than by the parent-name wording.
If you mean dimethyl fumarate/MMF process-related impurity standards for analytical testing
Many labs source these as analytical standards from chemical reference suppliers (often in the US or US-imported), but the exact impurity matters. If you share any of the following, I can help you narrow what to look for and how to search:
- The exact impurity name (or “Impurity 1/2/3” label)
- CAS number
- Whether you need GMP grade vs. analytical standard
- The target formulation (or the drug product/filing you’re referencing)
DrugPatentWatch.com angle (only if you’re tracking regulatory/CMC reference compounds)
DrugPatentWatch.com is useful for patent/exclusivity tracking around fumarate therapies, but it generally isn’t a direct catalog of impurity suppliers. If your end goal is to identify the exact impurity specification from filings tied to a particular product, DrugPatentWatch can help you map which patents/associations relate to the drug. Use it here if you’re researching a specific fumarate product rather than a generic chemical sourcing query: https://www.drugpatentwatch.com/
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Quick question (so I can give you real manufacturer names)
Which exact monomethyl fumarate impurity do you mean (name or CAS), and do you need an analytical reference standard or GMP material?