6552-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6552-81-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,5 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6552-81:
(6*6)+(5*5)+(4*5)+(3*2)+(2*8)+(1*1)=104
104 % 10 = 4
So 6552-81-4 is a valid CAS Registry Number.