Helium (cas 7440-59-7) Molecular Structure

CAS No. 7440-59-7 (Helium )

Molecular Formula: HeMolecular Weight: 4.0026

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    DetailDesc: High quality, 99.999% ~99.9999%He Specification Certified Concentration Units Analytical Method Helium (He) ≥ 99.9999 ≥ 99.9999 % GC/PDID nitrogen (N 2 ) ≤ 0.5 ≤ 0.5 ppmv GC/PDID Oxygen (O 2 ) ≤ 0.2 ≤ 0.2 ppmv GC/PDID carbon Monoxide (CO) ≤ 0.1 ≤ 0.1 ppmv GC Carbon Dioxide (CO 2 ) ≤ 0.1 ≤ 0.1 ppmv GC Other H...

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    DetailDesc: Helium - ( He ) Description Helium is a colorless , odorless , nontoxic , nonflammable gas that is lighter than air . It is shipped in steel cylinders under high pressure . 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 ...

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    DetailDesc:Name: Helium Synonyms: Atomichelium; Helium-4; o-Helium; p-Helium CAS Registry number: 7440-59-7 EINECS:231-168-5 Molecular Formula: He Boiling Point: -268.934 °C(lit.) Flash Point: none Density: 0.1785(0℃) Water:Soluble in water 0.86 ml/100 ml at 20oC Appearance: COLOURLESS, ODOURLESS, REFRIGERATED, LIQUEFIED GAS Safety Statements: A simple asphyxiant. A nonflammable gas. See ARGON for a de...

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    DetailDesc: Quick Details CAS No.: 7440-59-7 Melting Point: -272.2 °C(lit.) Boiling Point: -268.934 °C(lit.) Flash Point: none Solubility: Soluble in water 0.86 ml/100 ml at 20ºC Appearance: COLOURLESS, ODOURLESS, REFRIGERATED, LIQUEFIED GAS Risk Codes: 9 Safety: A simple asphyxiant. A nonflammable gas. See ARGON for a description of simple asphyxiants. Transport Information: UN 1046 Occurrence:...

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References of Helium cas 7440-59-7

} Toxicity

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

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