Description

Francium CAS NO 7440-73-5 is a highly reactive alkali metal element, notable for being one of the rarest and most unstable naturally occurring elements. Its extreme radioactivity and fleeting existence make it a subject of intense scientific research rather than a commodity chemical. This product is specifically synthesized and handled for advanced research applications in nuclear physics, fundamental particle studies, and specialized spectroscopic analysis.

Application

• Fundamental Scientific Research: Used in studies of atomic structure, decay processes, and the properties of superheavy elements.
• Nuclear Physics Experiments: Serves as a tracer or target material in particle accelerators and nuclear reaction studies.
• Spectroscopic Analysis: Employed in specialized atomic spectroscopy to understand electronic transitions in heavy alkali metals.
• Educational Reference Standards: Provides ultra-trace material for calibrating sensitive radiation detection equipment in academic and government laboratories.

Basic Information

Product Name	Francium
CAS No.	7440-73-5
Molecular Formula	Fr
Molecular Weight	223.02 g/mol (for most stable isotope Fr-223)
Synonyms	Francium-223; Element 87; Eka-Caesium; Alkali Metal Fr; Actinium K (AcK); (227)Ac daughter product; Radiofrancium
EINECS	231-163-0

Quality Control

Given its specialized nature, our francium is produced and handled under stringent, controlled conditions to ensure isotopic purity and radiochemical integrity. Quality is verified through γ-ray spectroscopy and half-life measurement against certified reference standards. A detailed Certificate of Analysis (COA) is provided with each shipment, specifying the isotopic composition, activity, and radiochemical purity.

Storage

Due to its high radioactivity and extreme reactivity, francium requires specialized containment protocols. It must be stored in a securely sealed, approved container within a shielded, controlled-access facility. The material is strictly light-sensitive (protect from all light exposure) and must be handled under an inert atmosphere to prevent rapid oxidation. Specific storage and handling procedures are provided with the material safety data sheet (MSDS).

Specification

Item	Specification
Appearance	Metallic (theoretical)
Isotopic Purity (Fr-223)	≥ 95% (by activity)
Radiochemical Purity	≥ 98%
Specific Activity	Provided on COA
γ-ray Spectroscopy	Conforms to reference spectrum

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.