105657-78-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 105657-78-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,6,5 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 105657-78:
(8*1)+(7*0)+(6*5)+(5*6)+(4*5)+(3*7)+(2*7)+(1*8)=131
131 % 10 = 1
So 105657-78-1 is a valid CAS Registry Number.