3661-28-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3661-28-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,6,6 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 3661-28:
(6*3)+(5*6)+(4*6)+(3*1)+(2*2)+(1*8)=87
87 % 10 = 7
So 3661-28-7 is a valid CAS Registry Number.