631909-78-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 631909-78-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,1,9,0 and 9 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 631909-78:
(8*6)+(7*3)+(6*1)+(5*9)+(4*0)+(3*9)+(2*7)+(1*8)=169
169 % 10 = 9
So 631909-78-9 is a valid CAS Registry Number.