105543-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 105543-91-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,5,4 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 105543-91:
(8*1)+(7*0)+(6*5)+(5*5)+(4*4)+(3*3)+(2*9)+(1*1)=107
107 % 10 = 7
So 105543-91-7 is a valid CAS Registry Number.