19803-49-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19803-49-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,8,0 and 3 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 19803-49:
(7*1)+(6*9)+(5*8)+(4*0)+(3*3)+(2*4)+(1*9)=127
127 % 10 = 7
So 19803-49-7 is a valid CAS Registry Number.