21983-19-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21983-19-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,8 and 3 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21983-19:
(7*2)+(6*1)+(5*9)+(4*8)+(3*3)+(2*1)+(1*9)=117
117 % 10 = 7
So 21983-19-7 is a valid CAS Registry Number.