Promethazine Impurity 28
Impurity reference standard · Promethazine
- CAS number
- 36144-72-6
- InChIKey
- UGAKQDULMLEJBP-UHFFFAOYSA-N
- Molecular formula
- C12H8N2OS
- Molecular weight
- 228.27
- Exact mass
- 228.0357 Da
About Promethazine Impurity 28
Promethazine Impurity 28 is a specified impurity of Promethazine. It is registered under CAS number 36144-72-6.
The compound is characterised by its molecular formula C12H8N2OS and a molecular weight of 228.27, with the two-dimensional structure shown above. Because it shares the Promethazine scaffold, it is typically used to track process-related and degradation impurities of Promethazine during method development, forced degradation and stability studies.
Computed from the structure, the compound has a monoisotopic mass of 228.0357 Da, a calculated LogP of 3.97, a topological polar surface area of 32.67 Ų. It presents 0 hydrogen-bond donors and 3 acceptors. These values are commonly used to anticipate chromatographic retention and to plan ionisation conditions during method development.
Each pack ships with a certificate of analysis together with the supporting analytical data — HNMR, MS and HPLC or GC traces — so the material can be released straight into your own QC workflow.
Available from stock in milligram to gram quantities; larger or custom synthesis requirements are quoted on request.
Calculated properties
Derived from the two-dimensional structure above using RDKit. Computed values describe the parent structure and are provided as a reference for method development — they are not measured data.
- LogP (Crippen)
- 3.97
- Topological polar surface area
- 32.67 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 3
- Rotatable bonds
- 1
- Heavy atoms
- 16
- Rings
- 3
- Elemental composition
- C 63.14% · H 3.53% · N 12.27% · O 7.01% · S 14.05%
Frequently asked questions
Does Promethazine Impurity 28 come with a certificate of analysis?
Yes. Every pack ships with a certificate of analysis plus the supporting analytical data — HNMR, MS and HPLC or GC traces.
How is Promethazine Impurity 28 uniquely identified?
The InChIKey UGAKQDULMLEJBP-UHFFFAOYSA-N identifies the structure unambiguously, so it can be matched against your own registry or a public database.
Is a structure file available for Promethazine Impurity 28?
Yes. The two-dimensional structure is drawn on this page from the SMILES record, and the SMILES or a molfile can be supplied on request.
What pack sizes are available for Promethazine Impurity 28?
Standard packs run from milligram to gram quantities and ship from stock. Larger or custom synthesis requirements are quoted on request.
Other Promethazine impurities
The same parent compound, neighbouring impurity numbers.
Need this standard, or a related one?
Send the compound name, CAS number or a structure file — we confirm availability, pack size and lead time, usually within one business day.