15640-98-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 15640-98-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,6,4 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 15640-98:
(7*1)+(6*5)+(5*6)+(4*4)+(3*0)+(2*9)+(1*8)=109
109 % 10 = 9
So 15640-98-9 is a valid CAS Registry Number.