102309-71-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 102309-71-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,2,3,0 and 9 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 102309-71:
(8*1)+(7*0)+(6*2)+(5*3)+(4*0)+(3*9)+(2*7)+(1*1)=77
77 % 10 = 7
So 102309-71-7 is a valid CAS Registry Number.