21138-46-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21138-46-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,3 and 8 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21138-46:
(7*2)+(6*1)+(5*1)+(4*3)+(3*8)+(2*4)+(1*6)=75
75 % 10 = 5
So 21138-46-5 is a valid CAS Registry Number.