Impurity reference standards
Timolol impurity standards
17 characterised compounds linked to Timolol are catalogued here, from named pharmacopoeial impurities to synthesis intermediates and breakdown products. Highlights of the range are 8 pharmacopoeial impurities and 1 nitrosamine.
17reference materials
8pharmacopoeial
1nitrosamines
Each lot ships with a certificate of analysis, and characterisation data such as 1H-NMR, mass spectrum and HPLC purity can be shared before you order. Laboratories use them to validate related-substance methods, set specification limits under ICH Q3A and Q3B, and identify unknown peaks in stability samples. The nitrosamine entries support ICH M7 risk assessments and confirmatory testing at trace levels.
By impurity type
Pharmacopoeial8EP, USP, BP or JP named impurities
Nitrosamines1N-nitroso impurities for ICH M7 work
Counts are based on product names. One compound can fall into more than one type.
All Timolol reference materials
1–17 of 17 standards
Questions
Timolol impurities, answered
How many Timolol impurity standards does Zemixal list?
The catalogue currently lists 17 compounds for Timolol, including 8 pharmacopoeial impurities and 1 nitrosamine. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Timolol impurity standard?
A certificate of analysis travels with every lot. On request we share the characterisation set, usually 1H-NMR, mass spectrum, HPLC purity and IR, and for some materials TGA or water content. Ask for the data before ordering if your QA team needs to review it.
Can Zemixal make a Timolol impurity that is not listed?
Often yes. Send the structure, name or CAS number with the quantity you need and our sourcing team checks custom synthesis options, usually from 10 mg up to gram scale, with a quoted lead time.
Do you supply Timolol nitrosamine impurities?
Yes. 1 N-nitroso compound is listed for Timolol. They are used for confirmatory testing and method validation in line with ICH M7 and the nitrosamine guidance from the major regulators.