217806-61-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217806-61-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,8,0 and 6 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 217806-61:
(8*2)+(7*1)+(6*7)+(5*8)+(4*0)+(3*6)+(2*6)+(1*1)=136
136 % 10 = 6
So 217806-61-6 is a valid CAS Registry Number.