156640-12-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156640-12-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,6,4 and 0 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 156640-12:
(8*1)+(7*5)+(6*6)+(5*6)+(4*4)+(3*0)+(2*1)+(1*2)=129
129 % 10 = 9
So 156640-12-9 is a valid CAS Registry Number.