216970-91-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216970-91-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,9,7 and 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 216970-91:
(8*2)+(7*1)+(6*6)+(5*9)+(4*7)+(3*0)+(2*9)+(1*1)=151
151 % 10 = 1
So 216970-91-1 is a valid CAS Registry Number.