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Dihydropyran

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Origin: China

Cas No: 110-87-2

Specification: 99%min

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  • Products Specification
  • Product Description

  • Property

    CAS No.: 110-87-2 Formula: C5H8O Molecular Weight: 84.11640

    Description

    Dihydropyran is a heterocyclic compound with the formula C5H8O. The six-membered, non-aromatic ring has five carbon atoms and one oxygen atom. It contains one double bond. There are two isomers of dihydropyran that differ by the location of the double bond. 3,4-Dihydro-2H-pyran has a double bond at position 5; 3,6-dihydro-2H-pyran has the double bond at position 4.

    Basic Info

    Chemical Name Dihydropyran
    Synonyms

    DIHYDROPYRANE;
    dihydro-2H-pyran;
    3,4-2H-dihydropyran;
    2H-Pyran, 3,4-dihydro-;
    DHP;
    3,4-DIHYDROPYRAN;
    2,3-dihydro-4H-pyran;
    3,4-Dihydro-2H-pyran (DHP);
    pyran,dihydro;
    2,3-dihydropyran;
    2H-3,4-dihydropyran;
    3,4-Dihydro-2H-pyran;
    5,6-dihydro-4H-pyran;

    CAS No. 110-87-2
    Molecular Formula C5H8O
    Molecular Weight 84.11640
    PSA 9.23000
    LogP 1.31050

    Properties

    Appearance & Physical State Colorless liquid
    Density 0.922
    Boiling Point 86ºC
    Melting Point -70ºC
    Flash Point -9ºC
    Refractive Index 1.4405-1.4425
    Water Solubility 20 g/L (20 ºC)
    Stability Stable under normal temperatures and pressures.
    Storage Condition Flammables area
    Vapor Density 2.9 (vs air)
    Vapor Pressure 74.4mmHg at 25°C

    Safety Info

    Hazard Class 3
    Safety Statements S16-S26-S37/39
    HS Code 29329995
    WGK Germany 3
    Packing Group II
    RIDADR UN 2376
    Risk Statements R11; R36/38
    Hazard Codes F
    Symbol GHS02, GHS07
    Hazard Declaration H225; H315; H319; H335
    Signal Word Danger
    Caution Statement P210; P261; P305 + P351 + P338

    Synthesis Route

    2-(2,4,6-trimethylphenoxy)oxane+phenol→Dihydropyran+2-Phenoxytetrahydropyran
    2-Methyl-2-hexanol+2-(2,4,6-trimethylphenoxy)oxane→Dihydropyran+2,4,6-Trimethylphenol
    oxane→Tetrahydrofuran+2,3-dihydrofuran

    GC Analysis

    Column type Active phase Temperature (°C) Retention Index (I) Temperature Control Method
    Packed Apiezon L 120. 697. isothermal
    Packed Apiezon L 160. 708. isothermal
    Packed Apiezon L 170. 720. isothermal
    Capillary VF-5 - 748. temperature ramp
    Capillary DB-1 - 664. temperature ramp

    Precursor

    methyl benzoate
    2-ETHOXY-3,4-DIHYDRO-2H-PYRAN
    Tetrahydrofurfuryl Alcohol
    dimethoxymethane

    Downstream Product

    N-(furan-2-ylmethyl)-9-(oxan-2-yl)purin-6-amine
    (3R)-3-methyl-4-(oxan-2-yloxy)butanenitrile
    ethyl tetrahydro-2H-pyran-2-carboxylate
    2-Hydroxy-4-(tetrahydropyran-2-yloxy)acetophenone

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