131188-68-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131188-68-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,1,8 and 8 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 131188-68:
(8*1)+(7*3)+(6*1)+(5*1)+(4*8)+(3*8)+(2*6)+(1*8)=116
116 % 10 = 6
So 131188-68-6 is a valid CAS Registry Number.
131188-68-6Relevant articles and documents
A New Synthesis of 1,4,5,8-Tetramethylnaphthalene
Kamada, Toshihiro,Wasada, Nobuhide
, p. 967 - 968 (1990)
A convenient four-step preparation of 1,4,5,8-tetramethylnaphthalene from commercially available 1,4,5,8-naphthalenetetracarboxylic acid is presented.