40642-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40642-23-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,6,4 and 2 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 40642-23:
(7*4)+(6*0)+(5*6)+(4*4)+(3*2)+(2*2)+(1*3)=87
87 % 10 = 7
So 40642-23-7 is a valid CAS Registry Number.