90978-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90978-21-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,9,7 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 90978-21:
(7*9)+(6*0)+(5*9)+(4*7)+(3*8)+(2*2)+(1*1)=165
165 % 10 = 5
So 90978-21-5 is a valid CAS Registry Number.