156559-80-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156559-80-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,5,5 and 9 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 156559-80:
(8*1)+(7*5)+(6*6)+(5*5)+(4*5)+(3*9)+(2*8)+(1*0)=167
167 % 10 = 7
So 156559-80-7 is a valid CAS Registry Number.