128333-77-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128333-77-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,3,3 and 3 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 128333-77:
(8*1)+(7*2)+(6*8)+(5*3)+(4*3)+(3*3)+(2*7)+(1*7)=127
127 % 10 = 7
So 128333-77-7 is a valid CAS Registry Number.