642442-75-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642442-75-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,4,4 and 2 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 642442-75:
(8*6)+(7*4)+(6*2)+(5*4)+(4*4)+(3*2)+(2*7)+(1*5)=149
149 % 10 = 9
So 642442-75-9 is a valid CAS Registry Number.