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3-chloro-2-<2-chloro-3(2H)-oxobenzothien-2-yl>thiochromen-4-one S-oxide is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

81576-34-3

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  • 81576-34-3 Structure

  • Basic information

    1. Product Name: 3-chloro-2-<2-chloro-3(2H)-oxobenzothien-2-yl>thiochromen-4-one S-oxide
    2. Synonyms:
    3. CAS NO:81576-34-3
    4. Molecular Formula:
    5. Molecular Weight: 395.287
    6. EINECS: N/A
    7. Product Categories: N/A

  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: N/A
    3. Flash Point: N/A
    4. Appearance: N/A
    5. Density: N/A
    6. Refractive Index: N/A
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. CAS DataBase Reference: 3-chloro-2-<2-chloro-3(2H)-oxobenzothien-2-yl>thiochromen-4-one S-oxide(CAS DataBase Reference)
    10. NIST Chemistry Reference: 3-chloro-2-<2-chloro-3(2H)-oxobenzothien-2-yl>thiochromen-4-one S-oxide(81576-34-3)
    11. EPA Substance Registry System: 3-chloro-2-<2-chloro-3(2H)-oxobenzothien-2-yl>thiochromen-4-one S-oxide(81576-34-3)

  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 81576-34-3(Hazardous Substances Data)

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81576-34-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81576-34-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,7 and 6 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81576-34:
(7*8)+(6*1)+(5*5)+(4*7)+(3*6)+(2*3)+(1*4)=143
143 % 10 = 3
So 81576-34-3 is a valid CAS Registry Number.

81576-34-3Downstream Products

81576-34-3Relevant academic research and scientific papers

Ring Contractions of Thiochroman-4-ones and Thiochromen-4-ones

MacKenzie, Neil E.,Thomson, Ronald H.

, p. 395 - 402 (2007/10/02)

3-Bromothiochroman-4-one and its S-oxide undergo ring contraction on heating, especially in the presence of sodium acetate, to give mixtures which include thioindigo (9) and the ethanediylidenethioindigo (10).Brominated 2,2-dimethylthiochroman-4-one reacts on silica gel to form thioindigo, thioindirubin, and the bis(benzothieno)pyran (17).Bromination of thiochromanone gives a number of products, including 2,3-dibromothiochromen-4-one S-oxide which, on heating with sodium acetate in acetic acid, is converted efficiently into thioindigo.The mechanism of this reaction is investigated.

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