Typically ?98% purity with high isotopic enrichment for reliable quantification.

Store at 2?8?C or ?20?C, protected from light and moisture.

Yes, SIL compounds are widely used in pharmacokinetic and drug metabolism studies.

They improve accuracy, linearity, precision, and robustness in analytical method validation.

13C avoids chromatographic shifts sometimes seen with deuterium, improving co-elution.

They are more expensive due to complex synthesis but provide superior accuracy.

Yes, custom labeling at specific molecular sites is available.

A SIL-IS is a labeled version of an analyte used for accurate LC-MS/MS quantification.

They mimic analyte behavior, correcting matrix effects and ion suppression.

Shelf life is typically 1?3 years with proper storage conditions.

13C and 15N labels do not affect chromatography; deuterium may cause slight retention shifts.

No, they are internal standards and cannot replace reference standards.

Yes, some compounds may degrade over time depending on stability and storage.

Yes, they improve precision in detecting pollutants, pesticides, and residues.

Ideal isotopic enrichment is typically above 95% for clear MS separation.

These are standards where isotopes are inserted at exact molecular positions.

Used in proteomics for protein quantification and metabolic profiling.

Yes, many drugs are available in deuterated or 13C-labeled versions.

Synthesized using isotope-enriched precursors through controlled organic chemistry.

Yes, labeled molecules show predictable mass shifts for easier identification.