642978-15-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642978-15-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,9,7 and 8 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 642978-15:
(8*6)+(7*4)+(6*2)+(5*9)+(4*7)+(3*8)+(2*1)+(1*5)=192
192 % 10 = 2
So 642978-15-2 is a valid CAS Registry Number.