211805-84-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 211805-84-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,1,8,0 and 5 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 211805-84:
(8*2)+(7*1)+(6*1)+(5*8)+(4*0)+(3*5)+(2*8)+(1*4)=104
104 % 10 = 4
So 211805-84-4 is a valid CAS Registry Number.