Helium - ( He )

Name: Helium - ( He )
Availability: helium-he-273880.html

Category:Fine Chemicals > Other Fine Chemicals
Product Name:Helium - ( He )
CAS No.:7440-59-7
Standard:In-house Standards
Price(USD):Negotiable
Company:Shanghai Wechem Technology Limited

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Basic Info

Grade: Pharmaceutical Grade

Factory Location: Building A311, Building A, No. 1255 Jinhai Road, Pudong New Area, Shanghai (Dingxin Building)

Main Sales Markets: North America,Central/South America,Western Europe,Eastern Europe,Australasia,Asia,Middle East,Africa
Sample Provided: no

Payment Terms: L/L

Specifications
Purity , %	99.999	99.9999	99.99999
Oxygen	≤1.0 ppmv	≤50 ppbv	≤10 ppbv
Nitrogen	≤2.0 ppmv	≤500 ppbv	≤50 ppbv
Carbon Dioxide	≤0.5 ppmv	≤100 ppbv
Carbon Monoxide	≤0.5 ppmv	≤50 ppbv
Carbon Dioxide+Carbon Monoxide			≤5 ppbv
Methane	≤0.5 ppmv	≤100 ppbv	≤5 ppbv
Water	≤3.0 ppmv	≤200 ppbv	≤100 ppbv
Hydrogen	≤1.0 ppmv		≤10 ppbv
Neon	≤4.0 ppmv		≤15 ppbv

Ship
DOT Shipping Name	Helium , Compressed
DOT Classification	2.2
DOT Label	Non-flammable Gas
UN Number	UN 1046
CAS No.	7440-59-7
CGA/DISS/JIS/BS341/DIN477	580/718/W21-14L/NO.3/NO.6
Shipped as	Compressed Gas

Technical Information
Cylinder State @ 21.1°C	Gas
Flammable Limits In Air	Non-flammable
Auto Ignition Temperature (°C )	’-
Molecular Weight (g/mol)	4.0026
Specific gravity (air =1)	0.138
Critical Temperature ( °C )	-267.95
Critical Pressure ( psig )	18.29

Applications
· In various analytical instrument applications, most commonly as a carrier gas in gas chromatography · As a heat transfer material · In the manufacturing of calibration mixtures · As a component in laser gas mixtures · In the semiconductor industry as a carrier/purge gas · Helium mixtures with hydrocarbons are used in Geiger counters employed for the detection of a, b, g and X-rays · In mixtures with oxygen as a breathing gas.

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