1287709-17-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1287709-17-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,8,7,7,0 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1287709-17:
(9*1)+(8*2)+(7*8)+(6*7)+(5*7)+(4*0)+(3*9)+(2*1)+(1*7)=194
194 % 10 = 4
So 1287709-17-4 is a valid CAS Registry Number.