6657-36-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6657-36-9 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 7 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 6657-36:
(6*6)+(5*6)+(4*5)+(3*7)+(2*3)+(1*6)=119
119 % 10 = 9
So 6657-36-9 is a valid CAS Registry Number.