159978-26-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 159978-26-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,9,7 and 8 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 159978-26:
(8*1)+(7*5)+(6*9)+(5*9)+(4*7)+(3*8)+(2*2)+(1*6)=204
204 % 10 = 4
So 159978-26-4 is a valid CAS Registry Number.