688734-31-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 688734-31-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,8,7,3 and 4 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 688734-31:
(8*6)+(7*8)+(6*8)+(5*7)+(4*3)+(3*4)+(2*3)+(1*1)=218
218 % 10 = 8
So 688734-31-8 is a valid CAS Registry Number.