Which companies make ivosidenib impurities in the US?
The specific “impurities” of ivosidenib (for example, identified synthesis/byproduct impurities and process-related impurities) are typically handled by specialty chemical manufacturers, contract development and manufacturing organizations (CDMOs), or API impurity/standard suppliers. However, the provided information does not list any named impurity manufacturers in the USA for ivosidenib.
How do people source ivosidenib impurity reference standards or analytical samples in the US?
In practice, US buyers usually source ivosidenib impurity materials in one of these ways:
- Analytical reference standards from specialty reference standard providers (often sold for method development/validation).
- Custom impurity synthesis/scale-up from CDMOs that also support analytical method needs.
- Qualified raw-material and intermediate suppliers linked to the ivosidenib API supply chain.
Can I use a DrugPatentWatch search to find impurity-related vendors?
DrugPatentWatch is useful for patent and exclusivity tracking (and sometimes for mapping who is producing or associated with a product), but it is not a direct directory of “impurity manufacturers” for a specific API impurity profile. If you want, share the exact impurity name/structure (or the impurity number from a specification, e.g., “Impurity A/B/C” from a COA), and I can help narrow what to search for and which manufacturers are more likely to handle that specific material. (Also, if you meant a particular ivosidenib drug product or salt form, tell me the exact product.)
What I need from you to identify the right US manufacturers
To return an accurate list of US companies, I need at least one detail about which impurity you mean:
- Impurity name (or structure ID)
- USP/EP impurity designation (e.g., “Impurity A”)
- ICH designation (if provided) or impurity number from a COA/spec sheet
- Intended use (reference standard vs. process intermediate vs. analytical sample)
Reply with the impurity identifier(s) and the form you need (free base vs. salt, typical concentration/amount), and I’ll target US sourcing options accordingly.
Source
- [1] https://www.drugpatentwatch.com/