Liquid Mercury[2]
Overview
Liquid Mercury is the only metal that remains liquid at standard room temperature and pressure. Its unique properties, such as high density and electrical conductivity, make it indispensable in various industrial and scientific applications. Historically, mercury has been used in mining, medicine, and manufacturing, though its toxicity has led to stricter regulations in recent decades. Recycled liquid mercury is increasingly important due to environmental concerns. Proper recovery and purification processes ensure its reuse in compliant applications, reducing the need for primary mercury mining. B2B buyers often source recycled mercury for cost-efficiency and sustainability.
Physical and Chemical Properties
Mercury's low melting point (-38.83°C) and high boiling point (356.73°C) allow it to remain liquid across a wide temperature range. Its density of 13.534 g/cm³ makes it one of the heaviest liquids. The metal forms amalgams with many other metals, including gold and silver, but not iron or platinum. Chemically, mercury is relatively inert and does not react with most acids. However, it oxidizes in air over time to form mercury oxide and reacts violently with some compounds, such as ammonia. These properties dictate its handling and storage requirements.
Main Applications
Mercury is used in thermometers, barometers, and manometers due to its thermal expansion properties. In electronics, it serves in tilt switches and fluorescent lamps. The dental industry uses mercury in amalgams for fillings, though alternatives are now preferred. Industrial applications include chlorine production (chlor-alkali process) and as a catalyst in chemical manufacturing. Recycled mercury is often reprocessed for these uses, ensuring compliance with environmental standards. Niche applications include gold extraction and precision instruments.
Safety and Storage
Mercury vapor and soluble compounds are highly toxic, affecting the nervous system and kidneys. Storage requires airtight containers, preferably under a layer of water or inert gas to minimize evaporation. Spills must be cleaned meticulously using specialized kits. Workers handling mercury must wear nitrile gloves, respirators, and work in well-ventilated areas. Facilities should have mercury vapor detectors and emergency protocols. Disposal must follow local hazardous waste regulations to prevent environmental contamination.
B2B Procurement Guide
Buyers should prioritize suppliers with certifications (e.g., ISO 14001) and transparent sourcing practices. Key procurement criteria include purity (≥99.9%), minimal impurities (e.g., lead, arsenic), and proper packaging (steel flasks with secure seals). Prices vary based on purity and market demand. Recycled mercury may cost 10-20% less than virgin material but requires verification of processing methods. Contracts should include safety data sheets (SDS) and transportation compliance documentation.
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