40437-18-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40437-18-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,4,3 and 7 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 40437-18:
(7*4)+(6*0)+(5*4)+(4*3)+(3*7)+(2*1)+(1*8)=91
91 % 10 = 1
So 40437-18-1 is a valid CAS Registry Number.