21057-48-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21057-48-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,5 and 7 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 21057-48:
(7*2)+(6*1)+(5*0)+(4*5)+(3*7)+(2*4)+(1*8)=77
77 % 10 = 7
So 21057-48-7 is a valid CAS Registry Number.