391681-51-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 391681-51-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,9,1,6,8 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 391681-51:
(8*3)+(7*9)+(6*1)+(5*6)+(4*8)+(3*1)+(2*5)+(1*1)=169
169 % 10 = 9
So 391681-51-9 is a valid CAS Registry Number.