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194712-95-3

3H-Naphtho[2,1-b]pyran, 3-(4-methylphenyl)-3-phenyl- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

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  • 194712-95-3 Structure

  • Basic information

    1. Product Name: 3H-Naphtho[2,1-b]pyran, 3-(4-methylphenyl)-3-phenyl-
    2. Synonyms:
    3. CAS NO:194712-95-3
    4. Molecular Formula: C26H20O
    5. Molecular Weight: 348.444
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 194712-95-3.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: 3H-Naphtho[2,1-b]pyran, 3-(4-methylphenyl)-3-phenyl-(CAS DataBase Reference)
    10. NIST Chemistry Reference: 3H-Naphtho[2,1-b]pyran, 3-(4-methylphenyl)-3-phenyl-(194712-95-3)
    11. EPA Substance Registry System: 3H-Naphtho[2,1-b]pyran, 3-(4-methylphenyl)-3-phenyl-(194712-95-3)

  • 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: 194712-95-3(Hazardous Substances Data)

194712-95-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 194712-95-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,7,1 and 2 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 194712-95:
(8*1)+(7*9)+(6*4)+(5*7)+(4*1)+(3*2)+(2*9)+(1*5)=163
163 % 10 = 3
So 194712-95-3 is a valid CAS Registry Number.

194712-95-3Downstream Products

194712-95-3Relevant articles and documents

Photochromic properties of naphthopyrans - PMMA thin film

Guo, Kunpeng,Chen, Yi

experimental part, p. 62 - 71 (2010/04/02)

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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