642430-15-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642430-15-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,4,3 and 0 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 642430-15:
(8*6)+(7*4)+(6*2)+(5*4)+(4*3)+(3*0)+(2*1)+(1*5)=127
127 % 10 = 7
So 642430-15-7 is a valid CAS Registry Number.