742107-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 742107-31-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,4,2,1,0 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 742107-31:
(8*7)+(7*4)+(6*2)+(5*1)+(4*0)+(3*7)+(2*3)+(1*1)=129
129 % 10 = 9
So 742107-31-9 is a valid CAS Registry Number.