91805-67-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91805-67-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,8,0 and 5 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 91805-67:
(7*9)+(6*1)+(5*8)+(4*0)+(3*5)+(2*6)+(1*7)=143
143 % 10 = 3
So 91805-67-3 is a valid CAS Registry Number.