21619-45-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21619-45-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,6,1 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21619-45:
(7*2)+(6*1)+(5*6)+(4*1)+(3*9)+(2*4)+(1*5)=94
94 % 10 = 4
So 21619-45-4 is a valid CAS Registry Number.