687971-83-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 687971-83-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,7,9,7 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 687971-83:
(8*6)+(7*8)+(6*7)+(5*9)+(4*7)+(3*1)+(2*8)+(1*3)=241
241 % 10 = 1
So 687971-83-1 is a valid CAS Registry Number.