491870-91-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 491870-91-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,1,8,7 and 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 491870-91:
(8*4)+(7*9)+(6*1)+(5*8)+(4*7)+(3*0)+(2*9)+(1*1)=188
188 % 10 = 8
So 491870-91-8 is a valid CAS Registry Number.