742103-77-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 742103-77-1 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 3 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 742103-77:
(8*7)+(7*4)+(6*2)+(5*1)+(4*0)+(3*3)+(2*7)+(1*7)=131
131 % 10 = 1
So 742103-77-1 is a valid CAS Registry Number.