77648-18-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77648-18-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,6,4 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 77648-18:
(7*7)+(6*7)+(5*6)+(4*4)+(3*8)+(2*1)+(1*8)=171
171 % 10 = 1
So 77648-18-1 is a valid CAS Registry Number.