20653-54-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20653-54-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,5 and 3 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 20653-54:
(7*2)+(6*0)+(5*6)+(4*5)+(3*3)+(2*5)+(1*4)=87
87 % 10 = 7
So 20653-54-7 is a valid CAS Registry Number.