1644-58-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1644-58-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,4 and 4 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1644-58:
(6*1)+(5*6)+(4*4)+(3*4)+(2*5)+(1*8)=82
82 % 10 = 2
So 1644-58-2 is a valid CAS Registry Number.