543680-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 543680-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,3,6,8 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 543680-81:
(8*5)+(7*4)+(6*3)+(5*6)+(4*8)+(3*0)+(2*8)+(1*1)=165
165 % 10 = 5
So 543680-81-5 is a valid CAS Registry Number.