143220-71-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143220-71-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,2,2 and 0 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 143220-71:
(8*1)+(7*4)+(6*3)+(5*2)+(4*2)+(3*0)+(2*7)+(1*1)=87
87 % 10 = 7
So 143220-71-7 is a valid CAS Registry Number.