77233-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77233-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,2,3 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77233-81:
(7*7)+(6*7)+(5*2)+(4*3)+(3*3)+(2*8)+(1*1)=139
139 % 10 = 9
So 77233-81-9 is a valid CAS Registry Number.