107644-77-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 107644-77-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,7,6,4 and 4 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 107644-77:
(8*1)+(7*0)+(6*7)+(5*6)+(4*4)+(3*4)+(2*7)+(1*7)=129
129 % 10 = 9
So 107644-77-9 is a valid CAS Registry Number.