4642-58-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4642-58-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,4 and 2 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4642-58:
(6*4)+(5*6)+(4*4)+(3*2)+(2*5)+(1*8)=94
94 % 10 = 4
So 4642-58-4 is a valid CAS Registry Number.