Lvbang Chemical绿邦化工
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Product Catalogue产品目录

Hydrocarbon, refrigerant, cryogenic & industrial gas — one supplier.碳氢、制冷剂、深冷与工业气体——一家供应商。

Browse the full Lvbang catalogue below. Purity grades and packaging can be customized to your spec.浏览绿邦全产品目录，纯度等级与包装可按需定制。

Nitrogen (R728)氮气（R728）

N₂ · CAS 7727-37-9 · UN 1066

High-purity nitrogen (R728) — inert gas, widely used in semiconductor wafer processing, metal heat treatment, petrochemical nitrogen sealing, food and pharmaceutical preservation.高纯氮气（R728）——惰性气体，广泛用于半导体晶圆加工、金属热处理、石化氮封、食品医药保鲜。

Chemical Formula化学式N₂
CAS NumberCAS 号7727-37-9
UN NumberUN 编号UN 1066
Boiling Point (1 atm)沸点（1 atm）−196 °C
Packaging包装47L/50L steel cylinders, ISO tank on request
Purity Grade纯度等级≥99.999%
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Product Quality Index产品质量指标

Nitrogen Concentration(Volume Fraction)氮气浓度(体积分数)≥99.999%
Oxygen Content(Volume Fraction, ppm)氧含量(体积分数,ppm)≤3
Hydrogen Content(Volume Fraction, ppm)氢含量(体积分数,ppm)≤1
CO Content(Volume Fraction, ppm)CO含量(体积分数,ppm)≤1
CO₂ Content(Volume Fraction, ppm)CO₂含量(体积分数,ppm)≤1
Methane Content(Volume Fraction, ppm)甲烷含量(体积分数,ppm)≤1
Water Content(Volume Fraction, ppm)水含量(体积分数,ppm)≤3

Physical Property物理性质

Component成分Nitrogen氮气
Appearance and Character外观和性状Colorless, odorless compressed gas无色、无味、压缩气体
Melting Point (℃)熔点(℃)−209.9 ℃
Boiling Point (℃)沸点(℃)−196 ℃
Relative Density (water=1)相对密度(水=1)0.81（−196℃时）
Relative Vapor Density (air=1)相对蒸气密度(空气=1)0.97
Saturated Vapor Pressure饱和蒸汽压 1026.42 kPa (-173 ℃) 1026.42千帕（-173 ℃）
Critical Temperature (℃)临界温度(℃)−147.1 ℃
Critical Pressure (MPa)临界压力(MPa)3.40 MPa
Flash Point (℃)闪点(℃)Non-flammable
Lower Explosion Limit (%v/v)爆炸下限%(v/v)Non-explosive
Upper Explosion Limit (%v/v)爆炸上限%(v/v)Non-explosive
Auto-ignition Temperature (℃)自燃温度(℃)Non-flammable
Solubility溶解度Slightly soluble in water and ethanol, soluble in liquid ammonia微溶于水、乙醇，溶于液氨

Main Use主要用途

Application用途Electronics & Semiconductors: protective gas, carrier gas and purge gas for wafer processing, CVD deposition, photolithography and SMT wave soldering. Metal processing & heat treatment: shielding gas for welding, bright annealing and continuous casting of stainless steel, aluminum profiles, auxiliary gas for laser cutting. Petrochemical industry: nitrogen inerting replacement (explosion-proof) for reactors and storage tanks, pipeline purging & drying, catalyst protection. Food & pharmaceutical: nitrogen filling for food fresh-keeping packaging, sterile protection and drug freeze-drying process in pharmaceutical production.电子半导体：用于晶圆加工、CVD沉积、光刻、SMT波峰焊等工艺的保护气、载气和吹扫气。金属加工与热处理：用作不锈钢、铝型材等金属焊接、光亮退火、连续铸造的保护气，以及激光切割的辅助气体。石油化工：用于反应釜和储罐的氮封惰化置换（防爆）、管道吹扫干燥及催化剂保护。食品医药：用于食品充氮保鲜包装、制药过程中的无菌保护和药品冻干工艺。

Packing Specification包装规格

Package包装47L/50L cylinders, ISO tank on request47L/50L气瓶，可按需提供ISO罐