521-93-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 521-93-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,2 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 521-93:
(5*5)+(4*2)+(3*1)+(2*9)+(1*3)=57
57 % 10 = 7
So 521-93-7 is a valid CAS Registry Number.
InChI:InChI=1/C22H25NO5/c1-13-15-5-6-18(25-3)22(26-4)17(15)11-23(2)8-7-14-9-19-20(28-12-27-19)10-16(14)21(13)24/h5-6,9-10,13H,7-8,11-12H2,1-4H3/t13-/m1/s1