71939-53-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71939-53-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,9,3 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 71939-53:
(7*7)+(6*1)+(5*9)+(4*3)+(3*9)+(2*5)+(1*3)=152
152 % 10 = 2
So 71939-53-2 is a valid CAS Registry Number.