217447-47-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217447-47-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,4,4 and 7 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 217447-47:
(8*2)+(7*1)+(6*7)+(5*4)+(4*4)+(3*7)+(2*4)+(1*7)=137
137 % 10 = 7
So 217447-47-7 is a valid CAS Registry Number.