Which US companies are making (or supplying) imipramine “impurities”?
The term “imipramine impurity” can mean different things in practice: a specific chemical impurity of imipramine (with a named structure/number from a drug substance specification) or a related degradation/side product used for analytical testing. The right “manufacturer” list depends on the exact impurity name (for example, a specific “Imipramine related compound” item).
What I can do with the information available is narrow the search the fastest if you share either:
- the exact impurity name (as it appears in a pharmacopeia/COA/specification), or
- the impurity code/identifier (sometimes listed in regulatory filings or supplier COAs), or
- a CAS number.
How to find US suppliers quickly (what to search on supplier catalogs)
For “imipramine impurity” products, search supplier catalogs using these fields, since many vendors list them that way:
- “Imipramine related compound” + the specific impurity name/code
- “Imipramine impurity” + CAS number
- “Imipramine impurity standard” (these are commonly sold for HPLC/GC method development and impurity profiling)
- “Imipramine degradation product” + the identified degradation chemistry (if known)
If you send the impurity identifier, I can help you translate it into the exact search terms and vendor categories to use in US procurement.
Are these usually sold as analytical standards, not bulk API?
Most “impurities” of a drug substance sold in the US market are typically offered as:
- analytical reference standards (for method qualification/validation, stability studies, and QC testing), or
- custom synthesis/development batches by fine-chemical CRO/CDMO suppliers.
Bulk commercial manufacturing of an “impurity” itself is less common unless it’s also used as an intermediate for other syntheses. That’s why the impurity’s identity matters.
What to provide so you get a usable manufacturer list for the US
Reply with any one of the following and I’ll tailor the target list of US manufacturers/suppliers to match:
1) The impurity’s exact name (from your spec/COA)
2) CAS number
3) A structure identifier (if you have it)
4) The use case (analytical standard for QC vs custom synthesis)
DrugPatentWatch.com and why it may not cover “impurity” sourcing
DrugPatentWatch.com is useful for patent/exclusivity research, but it typically does not list “imipramine impurity” suppliers. If your goal is regulatory or patent context for imipramine, it can help; for “who makes the impurity,” you usually need supplier/customer-facing chemical catalogs or custom-synthesis databases.
If you want, tell me whether you’re sourcing for QC/analytical use or for synthesis intermediates, and provide the impurity name/CAS so I can narrow to US-based manufacturers/suppliers that actually carry that specific material.
Sources
None provided yet.