99643-67-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99643-67-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,6,4 and 3 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 99643-67:
(7*9)+(6*9)+(5*6)+(4*4)+(3*3)+(2*6)+(1*7)=191
191 % 10 = 1
So 99643-67-1 is a valid CAS Registry Number.