CAS Registry Number

CAS 61971-47-9 — Thallium(I) malonate/formate (Clerici's soln.)

Thallium(I) malonate/formate, also known as Clerici’s solution, is a heavy metal salt used primarily as a high-refractive-index immersion liquid for microscopy, enabling detailed visualization of transparent specimens. This compound is a dense, colorless solution with exceptional optical properties, ideal for enhancing contrast in biological and material samples. Clerici’s solution has a CAS number of 61971-47-9, with the molecular formula C4H2O6Tl2 and a molecular weight of 554.8217 g/mol. It is stable at ambient storage conditions and poses no acute hazard (signal word: none). Molekula supplies Thallium(I) malonate/formate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.