134917-21-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 134917-21-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,9,1 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 134917-21:
(8*1)+(7*3)+(6*4)+(5*9)+(4*1)+(3*7)+(2*2)+(1*1)=128
128 % 10 = 8
So 134917-21-8 is a valid CAS Registry Number.
134917-21-8Relevant articles and documents
Synthesis of 1,2,4-Triazolopyrimidine-2-sulfonamides
Shankar, Ravi B.,Pews, R. Garth
, p. 169 - 172 (2007/10/02)
The 1,2,4-triazolopyrimidine-2-sulfonamides are a new class of highly active herbicides.A novel cyclization method for the synthesis of these compounds is discussed.