520-91-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 520-91-2 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 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 520-91:
(5*5)+(4*2)+(3*0)+(2*9)+(1*1)=52
52 % 10 = 2
So 520-91-2 is a valid CAS Registry Number.
InChI:InChI=1/2C28H44O/c1-18(2)19(3)7-8-20(4)24-11-12-25-23-10-9-21-17-22(29)13-15-27(21,5)26(23)14-16-28(24,25)6;1-19(2)20(3)9-10-22(5)26-15-16-27-23(8-7-17-28(26,27)6)12-13-24-18-25(29)14-11-21(24)4/h7-10,18-20,22,24-26,29H,11-17H2,1-6H3;9-10,12-13,19-20,22,25-27,29H,4,7-8,11,14-18H2,1-3,5-6H3/b8-7+;10-9+,23-12+,24-13-/t19-,20+,22-,24+,25-,26+,27+,28+;20-,22+,25-,26+,27-,28+/m00/s1