218431-37-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 218431-37-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,4,3 and 1 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 218431-37:
(8*2)+(7*1)+(6*8)+(5*4)+(4*3)+(3*1)+(2*3)+(1*7)=119
119 % 10 = 9
So 218431-37-9 is a valid CAS Registry Number.