217947-52-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217947-52-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,9,4 and 7 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 217947-52:
(8*2)+(7*1)+(6*7)+(5*9)+(4*4)+(3*7)+(2*5)+(1*2)=159
159 % 10 = 9
So 217947-52-9 is a valid CAS Registry Number.