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13331-18-5

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13331-18-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13331-18-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,3,3 and 1 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 13331-18:
(7*1)+(6*3)+(5*3)+(4*3)+(3*1)+(2*1)+(1*8)=65
65 % 10 = 5
So 13331-18-5 is a valid CAS Registry Number.

13331-18-5Downstream Products

13331-18-5Relevant articles and documents

Formation of dimer-type ketals in the reaction of 2,4,6-trichlorophenol and 2,4,6-trichloro-m-cresol with calcium hypochlorite in methanol: Conversion to quinones and other compounds

Heasley, Victor L.,Anderson, James D.,Bowman, Zachery S.,Hanley Jr., John C.,Sigmund, Geoffery A.,Van Horn, David,Shellhamer, Dale F.

, p. 6827 - 6830 (2007/10/03)

2,4,6-Trichlorophenol (2) and 2,4,6-trichloro-m-cresol (5) react with calcium hypochlorite (Ca(OCl)2) in MeOH to give respectively dimer-type ketals 2-(2′,4′,6′-trichlorophenoxy)-4,4-dimethoxy-6 -chlorocyclohexadien-2,5-one (6) and 2-(3′-methyl-2′,4′,6′-trichlorophenoxy)-4, 4-di-methoxy-5-methyl-6-chlorocyclohexadien-2,5-one (7). Ketal 6, which was too unstable to be isolated, and 7 hydrolyzed in H2O/HCl to 2-(2′,4′,6′-trichlorophenoxy)-6-chloro-1,4-ben-zoquinone (8) and 2-(3′-methyl-2′,4′,6′-trichlorophenoxy)-5 -methyl-6-chloro-1,4-benzoquinone (9), respectively. Ketal 6 and quinone 8 were also produced when 2 and Ca(OCl)2 reacted in DMF, followed by addition of MeOH and H2O, respectively. The mechanisms of these reactions are examined. Conversion of the ketals and quinones to other products is described.

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