71442-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71442-91-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,4,4 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 71442-91:
(7*7)+(6*1)+(5*4)+(4*4)+(3*2)+(2*9)+(1*1)=116
116 % 10 = 6
So 71442-91-6 is a valid CAS Registry Number.