81920-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81920-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,2 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81920-20:
(7*8)+(6*1)+(5*9)+(4*2)+(3*0)+(2*2)+(1*0)=119
119 % 10 = 9
So 81920-20-9 is a valid CAS Registry Number.
InChI:InChI=1/C20H34O4/c1-2-3-4-5-6-7-8-9-10-11-12-13-15-18(21)19(22)16-14-17-20(23)24/h6-7,9-10,12-13,18-19,21-22H,2-5,8,11,14-17H2,1H3,(H,23,24)/b7-6+,10-9+,13-12+