1645-18-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1645-18-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,4 and 5 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1645-18:
(6*1)+(5*6)+(4*4)+(3*5)+(2*1)+(1*8)=77
77 % 10 = 7
So 1645-18-7 is a valid CAS Registry Number.