939971-56-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 939971-56-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,3,9,9,7 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 939971-56:
(8*9)+(7*3)+(6*9)+(5*9)+(4*7)+(3*1)+(2*5)+(1*6)=239
239 % 10 = 9
So 939971-56-9 is a valid CAS Registry Number.