81549-15-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81549-15-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,4 and 9 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81549-15:
(7*8)+(6*1)+(5*5)+(4*4)+(3*9)+(2*1)+(1*5)=137
137 % 10 = 7
So 81549-15-7 is a valid CAS Registry Number.