6745-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6745-81-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,7,4 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6745-81:
(6*6)+(5*7)+(4*4)+(3*5)+(2*8)+(1*1)=119
119 % 10 = 9
So 6745-81-9 is a valid CAS Registry Number.