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helium atom

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Origin: China

Cas No: 7440-59-7

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 80 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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  • Products Specification
  • Product Description

  • Property

    CAS No.: 7440-59-7 Formula: He Molecular Weight: 4.00260

    Basic Info

    Chemical Name helium atom
    Synonyms

    HELIUM;

    CAS No. 7440-59-7
    Molecular Formula He
    Molecular Weight 4.00260
    PSA 0.00000
    LogP 0.00000

    Properties

    Appearance & Physical State COLOURLESS, ODOURLESS, REFRIGERATED, LIQUEFIED GAS
    Density 0.1785（0ºC）
    Boiling Point -268.934ºC(lit.)
    Melting Point -272.2ºC(lit.)
    Flash Point none
    Stability Stable; extremely unreactive.

    Safety Info

    RTECS MH6520000
    Hazard Class 2.2
    HS Code 2804290000
    WGK Germany 3
    RIDADR UN 1046
    Risk Statements R9
    Symbol GHS04
    Hazard Declaration H280
    Caution Statement P410 + P403
    Signal Word Warning

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