4140-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4140-20-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,1,4 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4140-20:
(6*4)+(5*1)+(4*4)+(3*0)+(2*2)+(1*0)=49
49 % 10 = 9
So 4140-20-9 is a valid CAS Registry Number.
InChI:InChI=1/C27H31NO4/c1-3-25(29)31-19-7-9-20-17(15-19)6-8-22-21(20)12-13-27(2)23(22)10-11-24(27)32-26(30)18-5-4-14-28-16-18/h4-5,7,9,14-16,21-24H,3,6,8,10-13H2,1-2H3/t21-,22-,23+,24+,27+/m1/s1