Overview
Gold (Au) is a dense, soft, and highly malleable metal with a distinctive yellow luster. It has been prized for its beauty and rarity since ancient times, serving as a symbol of wealth and status across cultures. Gold is chemically inert, resisting oxidation and corrosion, which makes it ideal for long-term storage and use in harsh environments. In modern industry, gold's excellent electrical conductivity and resistance to tarnishing have made it indispensable in electronics, particularly for connectors and circuit boards. Its biocompatibility also ensures widespread use in dentistry and medical implants.
Physical and Chemical Properties
Gold is characterized by its high density (19.32 g/cm³) and bright yellow color, which remains untarnished in air or water. It melts at 1064°C and boils at 2970°C, making it suitable for high-temperature applications. Gold is the most malleable of all metals; a single gram can be hammered into a sheet of 1 square meter. Chemically, gold is unreactive to most acids but dissolves in aqua regia (a mixture of nitric and hydrochloric acids). It forms alloys easily with other metals like silver and copper, altering its hardness and color for specific uses, such as rose or white gold in jewelry.
Main Applications
Jewelry and adornments account for approximately 50% of global gold demand, leveraging its luster and workability. In electronics, gold's conductivity ensures reliable performance in components like connectors, switches, and memory chips. The medical field uses gold in dental crowns and diagnostic equipment due to its non-reactivity. Gold also plays a critical role in finance as a hedge against inflation and currency fluctuations. Central banks hold significant reserves, while investors purchase bullion or ETFs. Emerging applications include nanotechnology, where gold nanoparticles are used in cancer treatment and sensors.
Safety and Storage
Gold is non-toxic and safe to handle, though prolonged skin contact may cause allergies in rare cases. Its high value necessitates secure storage, typically in safes or bank vaults, to prevent theft. Industrial users should store gold in anti-tarnish bags or inert gas environments to maintain purity. When working with gold alloys, ensure proper ventilation to avoid inhaling metal dust. Recycling gold scrap is environmentally beneficial, as mining new gold has significant ecological impacts, including deforestation and mercury pollution.
B2B Procurement Guide
When sourcing gold, prioritize suppliers certified by the London Bullion Market Association (LBMA) or similar bodies to guarantee purity (e.g., 99.99% for 24K gold). Specify alloy compositions if needed, such as 75% gold for 18K jewelry. Pricing fluctuates daily based on global markets, so lock in rates with futures contracts if possible. For industrial buyers, consider recycled gold to meet sustainability goals. Verify delivery terms, including assay certificates and insurance coverage. Small-quantity purchases may incur premiums, so consolidate orders to reduce costs.
Related Manufacturers
- 主营：彩砂、鹅卵石、石英砂、金刚砂、金玉明砂、滑石粉、河沙、水磨石、染色彩砂、水洗石
- 主营：氧化铝陶瓷、氧化锆陶瓷、工业陶瓷、Au黄金溅射靶材、溅射靶材、99氧化铝陶瓷、蒸发材料、镀膜材料、耐高温陶瓷、铝塑膜、坩埚、陶瓷板、铝型材、绝缘陶瓷、铜背板、包装膜、钛靶材、镍靶材、ITO靶材、防静电陶瓷、石墨坩埚、陶瓷垫圈、陶瓷零件、可加工陶瓷、微晶玻璃陶瓷
- 主营：鹅卵石、石英砂、染色彩砂、金刚砂、金玉明砂、彩砂、河沙、水洗砂、烧结彩砂网红砂、造景砂、雪景砂
- 主营：铝溶胶、硅溶胶、磷酸二氢铝、金蝉提金剂、油酸钠、油酸钾、十八胺、甲酸钠、硫酸氢钠、碳酸铵、尿素硝铵溶液、硝酸铵钙、碳酸亚铁、甲基硅酸、二氧化硫脲、氟硅酸镁、二羟甲基丙酸、葡萄糖酸钠、二甲基甲酰胺、四氯乙烯、正丁醇、大苏打、硝酸铁、油酸甲酯
- 主营：黄金奖章、金条、纪念金银币、黄金摆件、金银币定做、金银奖牌定制、定做金银条、定制金银礼品、金银元宝、金银摆件、黄金首饰、黄金手镯、企业商务礼品
- 主营：熔炼设备、真空造粒设备、铸锭设备、金属雾化制粉设备、熔金炉、熔金机、贵金属造粒机、贵金属熔炼炉、金属制粉机、贵金属制粉机、黄金制粉机、连续铸造设备、真空加压铸造设备、连续铸造机、倒模机、压片机、真空铸锭机、光谱仪、气动打标机、白银制粉机、水雾化制粉机、银制粉机
- 主营：碳酸钙、高岭土、滑石粉、金刚砂、负离子、贝壳粉
- 主营：磁粉、铁粉、硅灰粉、金玉明沙、天然彩砂、染色彩沙、天然石子、火山石、竹粉、贝壳彩片、地坪岩片、海泡石纤维、雨花石、石子、营养土
- 主营：高温镍基合金
- 主营：黄金靶材、贵金属铂铱铑、铂丝、铂铱丝
- 主营：滑石粉、白陶土、碳酸钙、金刚砂、石英砂、白云石砂、耐火材料、地坪材料、彩色地坪料、高尔夫球场、耐磨地坪硬化剂
- 主营：高纯银颗粒、高纯铜颗粒、高纯铁颗粒、高熵合金、金颗粒、铜合金、铝合金、铁合金(钢)、镍合金、钛合金、高纯钛颗粒、高纯钴颗粒、高纯铝颗粒、铂颗粒、高纯镍颗粒、铜靶、铝靶、钛靶、铬靶、纽扣锭
- 主营：fto靶材、钐靶材、硼化锆、高纯金颗粒、硒靶材、铝靶材、钆靶材、铽靶材、氟化镁、钇靶材、钼靶材、铬靶材、镉靶材、钽靶材、硒化锌、氟化镱、砷化镓、硒化锑、碲化镉、镍靶材、钨靶材、铑靶材、铒靶材、铪靶材、锑靶材、碲粉末
- 主营：包装盒、包装袋、标签、LED电子金价牌、纸罐、徽章、广告牌、标牌、电动车车牌、钥匙扣、塑料杯、证件套、证书定制、广告礼品、工艺品
- 主营：辐射检测仪、衰变池、通道类辐射监测设备、手持式XRF金分析仪、X射线荧光光谱仪