213178-43-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 213178-43-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,1,7 and 8 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 213178-43:
(8*2)+(7*1)+(6*3)+(5*1)+(4*7)+(3*8)+(2*4)+(1*3)=109
109 % 10 = 9
So 213178-43-9 is a valid CAS Registry Number.