99971-54-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99971-54-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,9,7 and 1 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 99971-54:
(7*9)+(6*9)+(5*9)+(4*7)+(3*1)+(2*5)+(1*4)=207
207 % 10 = 7
So 99971-54-7 is a valid CAS Registry Number.