42977-89-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42977-89-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,7 and 7 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 42977-89:
(7*4)+(6*2)+(5*9)+(4*7)+(3*7)+(2*8)+(1*9)=159
159 % 10 = 9
So 42977-89-9 is a valid CAS Registry Number.