6656-26-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6656-26-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,5 and 6 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 6656-26:
(6*6)+(5*6)+(4*5)+(3*6)+(2*2)+(1*6)=114
114 % 10 = 4
So 6656-26-4 is a valid CAS Registry Number.