71389-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71389-42-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,3,8 and 9 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 71389-42:
(7*7)+(6*1)+(5*3)+(4*8)+(3*9)+(2*4)+(1*2)=139
139 % 10 = 9
So 71389-42-9 is a valid CAS Registry Number.