42778-71-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42778-71-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,7,7 and 8 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 42778-71:
(7*4)+(6*2)+(5*7)+(4*7)+(3*8)+(2*7)+(1*1)=142
142 % 10 = 2
So 42778-71-2 is a valid CAS Registry Number.