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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

International Gases and Chemicals Ltd.
Tel:+44-0-1782-565556
Address: Unit 5 Speedwell Road Parkhouse East, Newcastle-under-Lyme Staffordshire ST5 7RG United Kingdom
Matheson Tri-Gas Inc.
Tel:+1 800-424-9300
Address: 166 Keystone Drive Montgomeryville, PA 18936
Shanghai Hynote Import & Export Co., Ltd.
Tel:+86-(379)-65867058
Address: R. 906A, Tomson Center, 228 Zhangyang Rd., Pudong, Shanghai 200120,
Air Liquide S.A.
Tel:+33-(149)-83-55-55
Address: 57 AV Carnot, Chambigny-Sur-Marne,Cedex F-94503,
Govind Poy Oxygen Ltd.
Tel:+91-(0832)-2702599
Address: Govind Poy House, Rua do Padre, Miranda, Margao, Goa 403601,
Ellenbarrie Industrial Gases Ltd.
Tel:+91-(33)-22491922
Address: 3A, Ripon Street, Kolkata, West Bengal 700016,
Mitsubishi Chemical Corporation
Tel:+81-(3)-6414 3730
Address: 14-1 Shiba 4-chome, Minato-ku, Tokyo 108-0014,
BOC Gases Korea Co. Ltd.
Tel:+82-(2)-780 9331
Address: 10th Fl.,Samsung 10th Floor, Samsung Bldg., 36-1 Yoido-dong, Youngdeungpo-ku, Seoul 150-010,
Consolidated Industrial Gases Inc.
Tel:631-8251
Address: 30th Floor, Wynsum Corporate Plaza, Ortigas Center, Pasig City,
Praxair (Thailand) Co. Ltd.
Tel:+66-(2)-3131290
Address: 156,Moo 16, Theparak Road, Bangasothong, King amphur Bangsaothong, Samut Prakam 10540,
American Air Liquide
Tel:(713)-624-8000
Address: 2700 Post Oak Blvd., Houston, Texas 77056,
Air Products & Chemicals, Inc.
Tel:+1-(610)-481-4911
Address: 7201 Hamilton Blvd, Allentown, Pennsylvania 18195,
International Industrial Gases Ltd.
Tel:
Address:
Pann Industries
Tel:912402340685
Address: B-8, pride plaza,near station MIDC, Aurangabad, Maharashtra 431005,
Shanghai Wechem Chemical Co., Ltd
Tel:86-21-51987501
Address: China ( Shanghai ) Pilot Free Trade Zone , Meisheng Road NO. 177 , Three Building 619, 6F Room.

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