Stable isotope standard for analytical research and method development.
- Module Type
- Stable Isotope Standards
- Category
- Hormones
- CAS
- 1346606-45-8
- PubChem CID
- 71315978
- Molecular Formula
- C18H16D2O2
- Molecular Weight
- 268.3
AI Isotope Property & Application AnalysisShowHide
Isotope Summary
- Labels
- D2
- Labeled atoms
- 2
- Isotope positions
- Partially confirmed in structure
- Calculation reliability
- Medium, some information should be confirmed
Mass & MS Parameters
- Unlabeled exact mass
- 266.13068 Da
- Labeled exact mass
- 268.143233 Da
- Exact mass shift
- 2.012553 Da
- Nominal mass shift
- 2
| Ion | m/z | Status |
|---|---|---|
| [M+H]+ | 269.15051 | Theoretical |
| [M+Na]+ | 291.132451 | Theoretical |
| [M+NH4]+ | 286.177056 | Theoretical |
| [M-H]- | 267.135957 | Theoretical |
Label Stability
- Overall
- Low risk
- Calculation reliability
- Medium, some information should be confirmed
- Carbon-bound deuterium is evaluated by local chemical environment; isotope effects should still be checked experimentally.
Internal Standard Suitability
- Rating
- High
- Chromatographic similarity
- Possible isotope effect
- Natural isotope overlap
- MODERATE
- Exact mass separation is 2.012553 Da; MS channel separation should be verified in the final method.
- The unlabeled parent mass was derived from the isotope structure because a curated parent structure was not matched.
- Overall suitability: High.
Recommended Applications
LC-MS/MS Quantitative Internal Standard is classified as Recommended based on isotope mapping, mass separation, and label-stability rules.
Isotope Dilution Mass Spectrometry is classified as Recommended based on isotope mapping, mass separation, and label-stability rules.
GC-MS Internal Standard is classified as Possible based on isotope mapping, mass separation, and label-stability rules.
Bioanalytical Method Development is classified as Recommended based on isotope mapping, mass separation, and label-stability rules.
AI Interpretation
This analysis is based on isotope-aware structure data. The compound contains D2, with an exact mass shift of 2.012553 Da. Label stability is assessed as Low risk, and internal-standard suitability is High. These results support analytical method development and require experimental validation.
AI-assisted analytical guidance is intended for method-development support. Actual isotope stability, chromatographic behavior, fragmentation and MRM transitions should be experimentally validated.