21506-06-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21506-06-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,0 and 6 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21506-06:
(7*2)+(6*1)+(5*5)+(4*0)+(3*6)+(2*0)+(1*6)=69
69 % 10 = 9
So 21506-06-9 is a valid CAS Registry Number.