66643-82-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66643-82-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,6,4 and 3 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 66643-82:
(7*6)+(6*6)+(5*6)+(4*4)+(3*3)+(2*8)+(1*2)=151
151 % 10 = 1
So 66643-82-1 is a valid CAS Registry Number.