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Home > All categories> Dyes and Pigments> Dyes> Disperse Dyes> (2Z)-2-(3-oxo-1-benzothiophen-2-ylidene)-1-benzothiophen-3-one
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(2Z)-2-(3-oxo-1-benzothiophen-2-ylidene)-1-benzothiophen-3-one

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Origin: China

Cas No: 522-75-8

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 100 mt/month

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

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  • Products Specification
  • Product Description

  • Property

    CAS No.: 522-75-8 Formula: C16H8O2S2 Molecular Weight: 296.36400

    Description

    Thioindigo is an organosulfur compound that is used to dye polyester fabric. A synthetic dye, thioindigo is related to the plant-derived dye indigo, replacing two NH groups with two sulfur atoms.
    Thioindigo is generated by the alkylation of the sulfur in thiosalicylic acid with chloroacetic acid. The resulting thioether cyclizes to 2-hydroxythianaphthene, which is easily converted to thioindigo. The related compound 4,7,4',7'-tetrachlorothioindigo, also a commercially important dye, can be prepared by chlorination of thioindigo.

    Basic Info

    Chemical Name (2Z)-2-(3-oxo-1-benzothiophen-2-ylidene)-1-benzothiophen-3-one
    Synonyms

    Durindone Red BP;
    Durindone Red B;
    Antinolo Red B;
    Ciba Pink B;
    Helindon Red BB;
    Benzo[b]thiophen-3(2H)-one, 2-(3-oxobenzo[b]thien-2(3H)-ylidene)-;
    Isothioindigo;
    Thioindigo Red S;
    Fluorescent Red Dye;
    Tetra Pink B;
    Thioindigo;
    Thioindigo Red B;

    CAS No. 522-75-8
    Molecular Formula C16H8O2S2
    Molecular Weight 296.36400
    PSA 84.74000
    LogP 4.17520

    Properties

    Density 1.544 g/cm3
    Boiling Point 409.2ºC at 760 mmHg
    Flash Point 177ºC
    Refractive Index 1.797

    Safety Info

    RTECS DT4330000
    Safety Statements 26-36
    HS Code 3204159000
    Risk Statements R36/37/38

    Toxicity

    Exposure Route Type of Test Species Observed Dose/Duration Toxic Effects
    Intraperitoneal LD50 - Lethal dose, 50 percent kill Rodent - rat 4170 mg/kg 1.Behavioral-somnolence (general depressed activity)

    Downstream Product

    2-aminobenzenesulfonic acid

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