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19939-77-6

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19939-77-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19939-77-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,3 and 9 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 19939-77:
(7*1)+(6*9)+(5*9)+(4*3)+(3*9)+(2*7)+(1*7)=166
166 % 10 = 6
So 19939-77-6 is a valid CAS Registry Number.

19939-77-6Relevant articles and documents

Synthesis of trans-1,2-bis(alkylthio)-1,2-bis(4'-bromophenyl)ethylenes and their corresponding bis-sulphones

Peeran, S. G.,Venkateswarlu, R.,Reddy, G. Hanumantha

, p. 223 - 227 (2007/10/02)

The synthesis of cis- and trans-1,2-dichloro-1,2-bis(4'-bromophenyl)ethylenes (6 and 7) has been carried out.The trans-1,2-dichloro-1,2-bis(4'-bromophenyl)ethylene (7) on treatment with strong nucleophiles like thiol ions gives the trans-1,2-bis(alkylthio

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