216171-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216171-57-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,1,7 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 216171-57:
(8*2)+(7*1)+(6*6)+(5*1)+(4*7)+(3*1)+(2*5)+(1*7)=112
112 % 10 = 2
So 216171-57-2 is a valid CAS Registry Number.