Available in 1 mg, 5 mg, 10 mg vials or custom aliquots.

U-13C means uniformly labeled with ??C; D-labeled means deuterated.

No radiation handling is needed, but standard chemical precautions apply.

Yes, used for accurate quantification of drugs of abuse.

They ensure sensitivity, reproducibility, and precise quantification.

Labeled compounds have isotope shifts but identical chemistry to unlabeled versions.

1?C and ??N labels have minimal effects; deuterium may affect kinetics slightly.

A labeled metabolite used for PK, metabolomics, and drug studies.

They help quantify biomarkers with high accuracy and low variability.

Available through specialized manufacturers offering high-purity SIL standards.