1556457-89-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1556457-89-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,5,6,4,5 and 7 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1556457-89:
(9*1)+(8*5)+(7*5)+(6*6)+(5*4)+(4*5)+(3*7)+(2*8)+(1*9)=206
206 % 10 = 6
So 1556457-89-6 is a valid CAS Registry Number.