19816-40-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19816-40-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,8,1 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 19816-40:
(7*1)+(6*9)+(5*8)+(4*1)+(3*6)+(2*4)+(1*0)=131
131 % 10 = 1
So 19816-40-1 is a valid CAS Registry Number.