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1257405-32-5

C26H20O is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

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  • 1257405-32-5 Structure

  • Basic information

    1. Product Name: C26H20O
    2. Synonyms:
    3. CAS NO:1257405-32-5
    4. Molecular Formula:
    5. Molecular Weight: 348.444
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 1257405-32-5.mol

  • 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: C26H20O(CAS DataBase Reference)
    10. NIST Chemistry Reference: C26H20O(1257405-32-5)
    11. EPA Substance Registry System: C26H20O(1257405-32-5)

  • 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: 1257405-32-5(Hazardous Substances Data)

1257405-32-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257405-32-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,4,0 and 5 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1257405-32:
(9*1)+(8*2)+(7*5)+(6*7)+(5*4)+(4*0)+(3*5)+(2*3)+(1*2)=145
145 % 10 = 5
So 1257405-32-5 is a valid CAS Registry Number.

1257405-32-5Upstream product

1257405-32-5Downstream Products

1257405-32-5Relevant articles and documents

Photochromic properties of naphthopyrans - PMMA thin film

Guo, Kunpeng,Chen, Yi

, p. 62 - 71 (2009)

A class of naphthopyran derivatives (3a-10a) with electron-donating and electron-acceptor substituent is prepared by condensation of 1,2-diaryl-2-propyn-1-ol with -naphthol in the presence of pyridinium para-toluenesulfonate (PPTS) as catalyst. All compounds go ring-opening isomerization in polymethylmethacrylate (PMMA) matrix with UV light irradiation (30watt) and the maximum absorption of ring-opening isomers is at the range of 426-556nm. Ring-opening isomers are completely back to ring-closing isomers when samples are kept in darkness, the bleach rate of ring-opening isomers in PMMA film increased significantly when temperature is more than 45C. Fatigue testing showed that no significant change of optical density was detected after 10cycles.

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