176684-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 176684-20-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,6,6,8 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 176684-20:
(8*1)+(7*7)+(6*6)+(5*6)+(4*8)+(3*4)+(2*2)+(1*0)=171
171 % 10 = 1
So 176684-20-1 is a valid CAS Registry Number.