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Rhenium Solid

Updated: 2026-07-19

Overview

Rhenium solid is a rare and valuable transition metal known for its exceptional physical and chemical properties. It was discovered in 1925 and is one of the densest elements, with a melting point exceeded only by tungsten and carbon. Rhenium is primarily obtained as a byproduct of molybdenum and copper ore processing. Due to its scarcity and high cost, rhenium is often used in specialized applications where its unique properties are indispensable. It is highly resistant to wear and corrosion, making it ideal for extreme environments. The metal is also ductile and can be drawn into wires or rolled into sheets, though it requires careful handling due to its brittleness at room temperature.

Physical and Chemical Properties

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Rhenium solid exhibits remarkable thermal stability, with a melting point of 3186°C and a boiling point of 5596°C, among the highest of all elements. Its density of 21.02 g/cm³ makes it one of the heaviest metals, surpassed only by osmium and iridium. The metal has a hexagonal close-packed crystal structure, contributing to its strength and durability. Chemically, rhenium is relatively inert at room temperature but reacts with oxygen at high temperatures to form rhenium(VII) oxide (Re2O7). It is resistant to most acids, though it dissolves slowly in nitric and sulfuric acids. Rhenium also forms various compounds, including halides, sulfides, and organometallic complexes, which are useful in catalysis and other industrial processes.

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Main Applications

Rhenium solid is critical in aerospace and defense industries, where it is used in turbine blades, rocket nozzles, and other high-temperature components. Its ability to withstand extreme heat and mechanical stress makes it invaluable for jet engines and spacecraft. In electronics, rhenium is used in filaments, electrical contacts, and thermocouples due to its excellent conductivity and stability. The chemical industry employs rhenium-based catalysts, particularly in petroleum refining for producing high-octane gasoline. Additionally, rhenium alloys, such as rhenium-tungsten and rhenium-molybdenum, are used in medical devices and precision instruments.

Safety and Storage

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While rhenium solid is not highly toxic, its dust or powder can pose respiratory hazards if inhaled. Proper personal protective equipment (PPE), including gloves and masks, should be worn when handling the material. Adequate ventilation is essential to prevent dust accumulation in the workplace. Storage conditions for rhenium should prioritize dryness and an inert atmosphere to prevent oxidation. The metal should be kept in sealed containers away from strong acids or oxidizers. In case of fire, use dry chemical or sand extinguishers, as water may react with hot rhenium and exacerbate the situation.

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B2B Procurement Guide

When procuring rhenium solid, buyers should prioritize purity levels, typically ranging from 99.9% to 99.99%, depending on the application. Certificates of analysis (CoA) and material safety data sheets (MSDS) should be requested to ensure compliance with industry standards. Suppliers should be evaluated for their ability to provide consistent quality, traceability, and reliable delivery schedules. Given the metal's high cost, buyers may consider long-term contracts or bulk purchases to secure favorable pricing. It is also advisable to verify the supplier's adherence to environmental and ethical sourcing practices, as rhenium is often sourced from conflict-sensitive regions.

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