7688-61-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7688-61-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,6,8 and 8 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7688-61:
(6*7)+(5*6)+(4*8)+(3*8)+(2*6)+(1*1)=141
141 % 10 = 1
So 7688-61-1 is a valid CAS Registry Number.