1544021-99-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1544021-99-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,4,4,0,2 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1544021-99:
(9*1)+(8*5)+(7*4)+(6*4)+(5*0)+(4*2)+(3*1)+(2*9)+(1*9)=139
139 % 10 = 9
So 1544021-99-9 is a valid CAS Registry Number.