20777-31-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20777-31-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,7 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20777-31:
(7*2)+(6*0)+(5*7)+(4*7)+(3*7)+(2*3)+(1*1)=105
105 % 10 = 5
So 20777-31-5 is a valid CAS Registry Number.