21978-45-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21978-45-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,7 and 8 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21978-45:
(7*2)+(6*1)+(5*9)+(4*7)+(3*8)+(2*4)+(1*5)=130
130 % 10 = 0
So 21978-45-0 is a valid CAS Registry Number.