102989-71-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 102989-71-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,2,9,8 and 9 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 102989-71:
(8*1)+(7*0)+(6*2)+(5*9)+(4*8)+(3*9)+(2*7)+(1*1)=139
139 % 10 = 9
So 102989-71-9 is a valid CAS Registry Number.