1021171-72-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1021171-72-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,1,1,7 and 1 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1021171-72:
(9*1)+(8*0)+(7*2)+(6*1)+(5*1)+(4*7)+(3*1)+(2*7)+(1*2)=81
81 % 10 = 1
So 1021171-72-1 is a valid CAS Registry Number.