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Helium cas no:7440-59-7

Synonyms: Atomichelium; Helium-4; o-Helium; p-Helium

Identification
NameHelium
CAS7440-59-7
SynonymsAtomichelium; Helium-4; o-Helium; p-Helium
EINECS(EC#)231-168-5
Molecular FormulaHe
Molecular Weight4.0026
Chemical Properties
AppearanceCOLOURLESS, ODOURLESS, REFRIGERATED, LIQUEFIED GAS
Globally Harmonized System of Classification adn Labelling of Chemicals(GHS)
Hazardclass2.2
Safety Data

Risk R9
Safety

A simple asphyxiant. A nonflammable gas. The safety issues for cryogenic helium are similar to those of liquid nitrogen; its extremely low temperatures can result in cold burns and the liquid to gas expansion ratio can cause explosions if no pressure-relief devices are installed. Containers of helium gas at 5 to 10 K should be handled as if they contain liquid helium due to the rapid and significant thermal expansion that occurs when helium gas at less than 10 K is warmed to room temperature.
Safety Statements: 9 
S9:Keep container in a well-ventilated place.
RIDADR: UN 1046 2.2
WGK Germany: 3
RTECS: MH6520000
F: 4.5-31


Toxicity
Vapors may cause dizziness or asphyxiation without warning. Vapors from liquefied gas are initially heavier than air and spread along ground.

supplier list

Promy International Group
Tel:+1-(888)-918-3888, 510-758-1388
Address: 130 Travalini Court, El Sobrante, California 94803,
Matheson Tri-Gas
Tel:215 641 2700
Address: Equipment Technology Center 166 Keystone Drive Montgomeryville, PA 18936
Scott Specialty Gases
Tel:+1-(877)-715-8651
Address: 6141 Easton Road Box 310, Plumsteadville, Pennsylvania 18949,
American Air Liquide
Tel:(713)-624-8000
Address: 2700 Post Oak Blvd., Houston, Texas 77056,
P.T. Praxair Indonesia
Tel:+62-(21)-3902567
Address: Ji. M.HH. Thamrin Kav. 9, Jakarta 10350,
Matheson Tri-Gas Inc.
Tel:+1 800-424-9300
Address: 166 Keystone Drive Montgomeryville, PA 18936
Chengdu Qiyu Gas Co., Ltd.
Tel:86-28-83579197
Address: Room 40, 5th Building, No. 517, North Honghe Road,
Wuhan Golden Wing Industry & Trade Co.,Ltd.
Tel:86-27-82645123
Address: Room 1101,Building 2-2,DaJiang Yuan(North Garden), JiangDa Road,JiangAn District
Central China Special Gas Co., Ltd.
Tel:86-734-8755555
Address: Cangjiang Heshui Industrial Park
Central China Special Gas Co., Ltd.
Tel:86-734-8755555
Address: Cangjiang Heshui Industrial Park
Central China Special Gas Co., Ltd.
Tel:86-734-8755555
Address: Cangjiang Heshui Industrial Park
Hongkong wechem chemical co., Ltd
Tel:852-0-30697507
Address: UNIT 04,7/F, Bright Way Tower, NO.33 Mongkok Road , Kowloon , HK .
Yara International ASA
Tel:+47-24-15 70 00
Address: P.O. Box 2464, Solli N-0202 Oslo Norway
Praxair
Tel:
Address:
Air Products and Chemicals, Inc.
Tel:610-481-4911;
Address:

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