111997-77-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 111997-77-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,9,9 and 7 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 111997-77:
(8*1)+(7*1)+(6*1)+(5*9)+(4*9)+(3*7)+(2*7)+(1*7)=144
144 % 10 = 4
So 111997-77-4 is a valid CAS Registry Number.
111997-77-4Relevant articles and documents
1,3-Dithienium and 1,3-Dithiolenium Salts, VII. - Synthesis of 1,3-Dithian-2-ylium Tribromides
Stahl, Ingfried
, p. 617 - 620 (2007/10/02)
The 2-substituted 1,3-dithianes 1 react in good yields with bromine in diethyl ether to give the 2-substituted 1,3-dithian-2-ylium tribromides 3.