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83986-05-4

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83986-05-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83986-05-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,9,8 and 6 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 83986-05:
(7*8)+(6*3)+(5*9)+(4*8)+(3*6)+(2*0)+(1*5)=174
174 % 10 = 4
So 83986-05-4 is a valid CAS Registry Number.

83986-05-4Relevant articles and documents

Tricyclic compounds

-

, (2008/06/13)

A technique is described for the preparation of a wide variety of basic derivatives of linearly condensed tricyclic systems formed by two external benzene nuclei and a 7-membered central ring having 2 chalcogen atoms as hetero atoms. Derivatives of 11H-dibenzo(b,e)-1,4-dioxepin are obtained when the chalcogens are both oxygen atoms; derivatives of 11H-dibenzo(b,f)-1,4-dithiepin are obtained when the chalcogens are both sulfur atoms; derivatives of 6H-dibenz(b,e)-1,4-oxathiepin and 11H-dibenz(b,f)-1,4-oxathiepin are obtained with combinations of sulfur and oxygen atoms as chalcogens.

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