23949-73-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23949-73-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,9,4 and 9 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 23949-73:
(7*2)+(6*3)+(5*9)+(4*4)+(3*9)+(2*7)+(1*3)=137
137 % 10 = 7
So 23949-73-7 is a valid CAS Registry Number.