135957-83-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 135957-83-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,9,5 and 7 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 135957-83:
(8*1)+(7*3)+(6*5)+(5*9)+(4*5)+(3*7)+(2*8)+(1*3)=164
164 % 10 = 4
So 135957-83-4 is a valid CAS Registry Number.
135957-83-4Relevant articles and documents
Perfluoroalkyl migration in the rearrangement of 4-perfluoroalkyl-4-quinols
Uno,Yayama,Suzuki
, p. 8353 - 8368 (2007/10/02)
Heating a DMSO solution of 4-(perfluoro-n-alkyl)-4-hydroxy-2,5-cyclohexadien-1-one (4-perfluoroalkyl-4-quinols) in the presence of a catalytic amount of base brought about 1,2-migration of the perfluoroalkyl group to give 2-(perfluoro-n-alkyl)hydroquinone