1009507-55-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1009507-55-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,0,9,5,0 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1009507-55:
(9*1)+(8*0)+(7*0)+(6*9)+(5*5)+(4*0)+(3*7)+(2*5)+(1*5)=124
124 % 10 = 4
So 1009507-55-4 is a valid CAS Registry Number.