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Methadone Hydrochloride impurities and related standards

Methadone Hydrochloride is held here as a working collection of 14 reference materials across 10 CAS numbers. Within the range, numbered impurities go up to 24 and 1 EP-designated impurity is named explicitly. 13 of the entries are impurity-type materials of the parent, 14 are salt or counter-ion variants. 9 entries carry a verified structure drawing, a coverage of 64%. 9 of them sit in tier A or B, meaning the data behind the page is complete enough to be indexed and quoted directly, while 5 remain tier C and are kept for search coverage. Because these are degradation and process impurities of a single parent, the useful comparison between suppliers is not the headline count but which letters are actually covered and whether each one arrives with a structure and a stated content basis. Asking for the specific impurity by letter and by structure is faster than asking for a percentage of total related substances, because the second question has no single answer.

Sources: DailyMed (US NLM) - METHADONE HYDROCHLORIDE TABLET [VISTAPHARM, LLC].

9 reference standards related to Methadone Hydrochloride held in the RSSE catalogue — pharmacopoeial impurities, non-compendial impurities, metabolites and labelled analogues where available.

In this group: 8 impurity reference standards · 1 general reference standard. CAS numbers are listed for 9 of 9; 9 entries carry a structure drawing.

On this page

9 reference standards

All entries — structure, identifiers and pack sizes

9 reference standards

Frequently asked

How many Methadone Hydrochloride-related reference standards do you hold?
9 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 9 of them and 9 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Methadone Hydrochloride impurity that is not listed here?
Yes. Non-compendial impurities can be quoted from a structure — a CAS number is not required. Send the structure, a SMILES string or the parent drug substance with your enquiry and we will come back with availability.
What documentation is supplied with Methadone Hydrochloride impurities?
Every lot ships with its own certificate of analysis. The certificate records the catalogue number, the batch number, the tests performed, the specification applied and the result obtained for that lot. A safety data sheet is supplied with the shipment.
Do you publish prices or a lead time for Methadone Hydrochloride impurities?
No price list is published: quotations are prepared per enquiry, because availability and packing depend on the lot and the quantity you need. Send the catalogue number and the quantity and a technical contact will answer with availability and a quotation.

Cannot find the impurity you need? Non-compendial impurities can be quoted from a structure — a CAS number is not required. Write to sales@rssechem.com.