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squaric acid

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Origin: China

Cas No: 2892-51-5

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 50 mt/month

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  • Products Specification
  • Product Description

  • Quick Details

    CAS No.:
    2892-51-5
    Other Names:
    Squaric acid
    MF:
    C4H2O4
    EINECS No.:
    220-761-4
    Place of Origin:
    China
    Type:
    Pharmaceutical Intermediates
    Purity:
    99%MIN
    Brand Name:
    Richest
    Model Number:
    2892-51-5
    Application:
    organic intermediates
    Appearance:
    colorless liquid

    Packaging&Delivery

    Packaging Details
    1kg/bag,25kg/bag,25kg/drum or customer's request
    Port
    shanghai
    Lead Time:
    Quantity(Kilograms)1 - 25>25
    Est. Time(days)3To be negotiated

  • Property

    CAS No.: 2892-51-5 Formula: C4H2O4 Molecular Weight: 114.05600

    Description

    Squaric acid, also called quadratic acid, because its four carbon atoms approximately form a square, is an organic compound with chemical formula C4H2O4.
    The conjugate base of squaric acid is the hydrogensquarate anion C4HO4−; and the conjugate base of the hydrogensquarate anion is the divalent squarate anion C4O42−. This is one of the oxocarbon anions, which consist only of carbon and oxygen.
    Squaric acid is a reagent for chemical synthesis, used for instance to make photosensitive squaraine dyes and inhibitors of protein tyrosine phosphatases.

    Basic Info

    Chemical Name squaric acid
    Synonyms

    SQUARICACIDDIBUTYLESTERS;
    Squaric acid;
    dihydroxy-cyclobutenedion;
    1-Cyclobutene-3,4-dione-1,2-diol;
    QUADRATIC ACID;
    2-dione;
    Squaric;
    DIKETOCYCLOBUTENEDIOL;
    dihydroxycyclobutenedione;
    3,4-Dihydroxy-3-cyclobutene-1,2-dione;
    SQUARC ACID;

    CAS No. 2892-51-5
    Molecular Formula C4H2O4
    Molecular Weight 114.05600
    PSA 74.60000
    LogP -0.53420

    Properties

    Appearance & Physical State White powder
    Melting Point >300 °C(lit.)
    Flash Point 190 °C
    Water Solubility 20 g/L (30 ºC)

    Safety Info

    RTECS GU1800000
    Hazard Class 8
    Safety Statements S26; S36; S37/39
    HS Code 29144090
    WGK Germany 3
    Packing Group II
    RIDADR 3261
    Risk Statements R36/37/38; R43
    Hazard Codes Xi
    Hazard Declaration H315; H317; H319; H335
    Symbol GHS07
    Caution Statement P261; P280; P305 + P351 + P338
    Signal Word Warning

    Synthesis Route

    1,2-diethoxy-3,3,4,4-tetrafluoro-cyclobutene→squaric acid
    3-hydroxy-4-morpholin-4-ylcyclobut-3-ene-1,2-dione→squaric acid
    poly-silver(I) squarate→squaric acid

    Toxicity

    Exposure Route Type of Test Species Observed Dose/Duration Toxic Effects
    Subcutaneous TDLo - Lowest published toxic dose Rodent - mouse 368 mg/kg/92W-I 1.Tumorigenic-equivocal tumorigenic agent by RTECS criteria
    2.Tumorigenic-tumors at site of application

    Precursor

    3,4-bis[(2-methylpropan-2-yl)oxy]cyclobut-3-ene-1,2-dione
    3-hydroxy-4-morpholin-4-ylcyclobut-3-ene-1,2-dione
    2,4,4-trichloro-3-morpholin-4-ylcyclobut-2-en-1-one
    1,2-diethoxy-3,3,4,4-tetrafluoro-cyclobutene

    Downstream Product

    cyclobutane-1,1,2,2,3,3,4,4-octol
    (4Z)-3-oxo-4-[(1,3,3-trimethylindol-1-ium-2-yl)methylidene]-2-[(E)-(1,3,3-trimethylindol-2-ylidene)methyl]cyclobuten-1-olate
    (4Z)-4-[(1-ethylquinolin-1-ium-2-yl)methylidene]-2-[(E)-(1-ethylquinolin-2-ylidene)methyl]-3-oxocyclobuten-1-olate
    squaric acid dibutyl ester

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