40657-82-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40657-82-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,6,5 and 7 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 40657-82:
(7*4)+(6*0)+(5*6)+(4*5)+(3*7)+(2*8)+(1*2)=117
117 % 10 = 7
So 40657-82-7 is a valid CAS Registry Number.