CAS Registry Number

CAS 3722-51-8 — Sieber Linker (3-Hydroxyxanthen-9-one)

Sieber Linker (3-Hydroxyxanthen-9-one) is a fluorescent organic compound widely used in synthetic chemistry, particularly for peptide and oligonucleotide conjugation. It enables efficient bioconjugation under mild conditions, making it valuable in drug discovery and molecular biology research. CAS 3722-51-8, molecular formula C13H8O3, molecular weight 212.2008. Stored at ambient conditions, it carries no signal word for hazard classification. Molekula supplies Sieber Linker from research to bulk quantities with full documentation and ISO 9001:2015 traceability.