18921-54-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18921-54-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,9,2 and 1 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 18921-54:
(7*1)+(6*8)+(5*9)+(4*2)+(3*1)+(2*5)+(1*4)=125
125 % 10 = 5
So 18921-54-5 is a valid CAS Registry Number.
InChI:InChI=1/C16H22N2O5/c1-3-7-13(15(20)21)18-14(19)11(2)17-16(22)23-10-12-8-5-4-6-9-12/h4-6,8-9,11,13H,3,7,10H2,1-2H3,(H,17,22)(H,18,19)(H,20,21)