21029-18-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21029-18-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,2 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 21029-18:
(7*2)+(6*1)+(5*0)+(4*2)+(3*9)+(2*1)+(1*8)=65
65 % 10 = 5
So 21029-18-5 is a valid CAS Registry Number.