217089-18-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217089-18-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,0,8 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 217089-18:
(8*2)+(7*1)+(6*7)+(5*0)+(4*8)+(3*9)+(2*1)+(1*8)=134
134 % 10 = 4
So 217089-18-4 is a valid CAS Registry Number.