221052-40-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221052-40-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,0,5 and 2 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221052-40:
(8*2)+(7*2)+(6*1)+(5*0)+(4*5)+(3*2)+(2*4)+(1*0)=70
70 % 10 = 0
So 221052-40-0 is a valid CAS Registry Number.