Which US companies make pirfenidone impurities (or sell them for use in testing)?
I can’t give a reliable list from the information provided in this chat. “Pirfenidone impurities” can mean different things (for example, specific named impurities such as oxidized/by-product species vs. generic “related substances” mixtures), and the right manufacturers are often identified by the impurity name/CAS number and intended use (analytical reference standard vs. process impurity).
To identify the correct USA suppliers, you typically need at least one of the following:
- the exact impurity name (e.g., a specific related substance/oxidation product), or
- a CAS number for the impurity, or
- whether you want an analytical reference standard or a manufacturing-grade impurity for process development/QC, or
- whether you need GMP documentation (e.g., CoA, GMP/DMF status).
If you share the specific impurity (name or CAS) and the type (reference standard vs. raw material), I can narrow to the most likely US manufacturers/distributors.
How to search for US suppliers once you know the impurity’s identity
People commonly find suppliers by searching combinations like:
- “(impurity name) CAS” + “reference standard” + “USA”
- “pirfenidone related compound” + “GMP” + “COA”
- the impurity’s internal code from a pharmacopeia/USP method (if you have it) + “analytical standard”
If you tell me the impurity’s CAS/name, I can also suggest which supplier categories to target (reference standards vendors vs. custom synthesis vs. bulk chemical distributors).
Are these impurities typically sold as analytical reference standards in the US?
Often, the most accessible “impurity” products in the US market are analytical reference standards for HPLC/LC-MS methods, sold with CoAs for identity and purity, rather than large-scale process impurities. Exact availability depends on whether the impurity is a recognized pharmacopeial “related substance” and whether there’s enough market demand for a standalone standard.
If you mean generic “pirfenidone impurity standards,” what details should you provide?
Reply with:
1) impurity name(s) or CAS number(s)
2) required grade (analytical reference standard vs. GMP/ISO grade)
3) format (neat solid, solution, specific concentration)
4) documentation needs (CoA only, GMP batch record, etc.)
5) quantity range and target application (QC, method validation, stability)
Then I can produce a targeted list of likely USA manufacturers/suppliers for that exact impurity.
Patents and exclusivity (optional, if you’re doing sourcing based on IP)
If your goal includes whether impurity-related manufacturing routes are covered by patents, DrugPatentWatch.com is a useful starting point for related IP landscapes in the pirfenidone space. DrugPatentWatch.com
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