氦气 (CAS No.7440-59-7)
- 物化性质
- 无色、无味、无毒的惰性气体。标准状况下密度约0.1785 g/L，是空气中密度最小的气体之一。沸点-268.93°C，熔点-272.2°C，临界温度-267.96°C，临界压力0.228 MPa。分子量4.0026，化学性质极不活泼，几乎不与任何物质反应。
- 纯度
- ≥99.999%
- 外观
- 无色、无味
English description（英文原文，共 1012 字符）
Product Name:Helium
English Name:Helium
CAS No.:7440-59-7
Aliases:High-purity helium, Liquid helium
Molecular Formula:He
Physical Properties:A colorless, odorless, non-toxic inert gas. Its density is about 0.1785 g/L at standard conditions, making it one of the least dense gases in air. Boiling point -268.93°C, melting point -272.2°C, critical temperature -267.96°C, critical pressure 0.228 MPa. Molecular weight 4.0026, extremely low chemical reactivity, essentially no reaction with any substance.
Uses:Mainly used for cooling superconducting magnets in MRI equipment, and in cryogenic superconducting systems of particle accelerators and nuclear fusion devices; provides extremely low temperature environments for quantum physics and condensed matter experiments; also used as an industrial shielding gas, precision instrument coolant, and cryogenic rocket propellant.
Technical Specifications:
Purity: ≥99.999%
Packaging: 100L-500L dewars
Appearance: colorless, odorless
Molar mass: 4.0026 g/mol
English Name:Helium
CAS No.:7440-59-7
Aliases:High-purity helium, Liquid helium
Molecular Formula:He
Physical Properties:A colorless, odorless, non-toxic inert gas. Its density is about 0.1785 g/L at standard conditions, making it one of the least dense gases in air. Boiling point -268.93°C, melting point -272.2°C, critical temperature -267.96°C, critical pressure 0.228 MPa. Molecular weight 4.0026, extremely low chemical reactivity, essentially no reaction with any substance.
Uses:Mainly used for cooling superconducting magnets in MRI equipment, and in cryogenic superconducting systems of particle accelerators and nuclear fusion devices; provides extremely low temperature environments for quantum physics and condensed matter experiments; also used as an industrial shielding gas, precision instrument coolant, and cryogenic rocket propellant.
Technical Specifications:
Purity: ≥99.999%
Packaging: 100L-500L dewars
Appearance: colorless, odorless
Molar mass: 4.0026 g/mol
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常见问题
- 氦气的 CAS 号是多少？
- 氦气的 CAS 号是 7440-59-7。
- 氦气的分子式和分子量是什么？
- 氦气的分子式为 He。
- 氦气的英文名称是什么？
- 氦气的英文名称为 Helium。
- 氦气还有哪些别名？
- 氦气又称 高纯氦、液氦。
- 氦气有哪些供应商和生产厂家？
- 掌上化工当前收录 1 条氦气供应报价，来自 1 家供应商，可按地区、纯度、级别筛选对比。
- 氦气的供应商主要分布在哪些地区？
- 氦气的供应商主要分布在 上海市（1 条） 等地。
- 氦气有哪些级别可选？
- 平台上氦气的供应级别包括 工业级。
- 氦气的报价单位是什么？
- 氦气的报价单位主要有 千克。
- 哪里可以查到氦气的价格？
- 掌上化工氦气产品页汇总了各供应商的最新报价与规格，地址：/chemicals/7440-59-7/。部分供应商价格为电议，可通过页面上的询价功能直接获取。
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