1644540-78-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1644540-78-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,4,5,4 and 0 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1644540-78:
(9*1)+(8*6)+(7*4)+(6*4)+(5*5)+(4*4)+(3*0)+(2*7)+(1*8)=172
172 % 10 = 2
So 1644540-78-2 is a valid CAS Registry Number.