Crystal forms of amino lipids
Provided herein are novel solid forms of each of four compounds: (1) heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate (“Compound 1”), (2) heptadecan-9-yl 8-((2-hydroxyethyl)(6-oxo-6-(undecyloxy)hexyl)amino)octanoate (“Compound 2”), (3) heptadecan-9-yl 8-((2-hydroxyethyl)(8-(nonyloxy)-8-oxooctyl)amino)octanoate (“Compound 3”), and (6Z,9Z,28Z,31Z)-heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate (“MC3”), and related compositions and methods.
1 . A salt or cocrystal of heptadecan-9-yl 8-((2-hydroxyethyl)amino)octanoate (“Compound 1”) and 4-hydroxybenzoic acid, wherein the salt or cocrystal exhibits an X-ray powder diffraction pattern obtained using Cu Kα radiation, comprising two, three, four, or more characteristic peaks expressed in degrees 2-theta (+/−0.2) selected from the group consisting of 4.5, 6.8, 9.1, 11.4, and 13.7.
2 . The salt or cocrystal of claim 1 , wherein the salt or cocrystal exhibits a differential scanning calorimetry thermogram showing a primary endotherm expressed in units of ° C. at a temperature of 103+/−2° C.
3 . The salt or cocrystal of claim 2 , wherein the salt or cocrystal exhibits a differential scanning calorimetry thermogram showing a second primary endotherm expressed in units of ° C. at a temperature of 68+/−2° C.
4 . The salt or cocrystal of claim 1 , wherein the stoichiometry of Compound 1 and 4-hydroxybenzoic acid is within the range of from about 1:0.2 to 1:5 or from about 1:0.5 to 1:2.
5 . The salt or cocrystal of claim 1 , wherein the stoichiometry of Compound 1 and 4-hydroxybenzoic acid is about 1:1.
6 . The salt or cocrystal of claim 1 , being an anhydrate, a solvate, or a hydrate.
7 . The salt or cocrystal of claim 1 , wherein the salt or cocrystal exhibits an X-ray powder diffraction pattern obtained using Cu Kα radiation, having characteristic peaks expressed in degrees 2-theta (+/−0.2) at 4.5, 6.8, 9.1, 11.4, 13.7, 18.3, 20.1, and 20.6.
8 . The salt or cocrystal of claim 1 , wherein the salt or cocrystal contains less than 1% by weight of impurities.
9 . The salt or cocrystal of claim 1 , wherein the salt or cocrystal is a crystalline solid containing less than 1% by weight of other crystalline forms of the salt or cocrystal.
10 . The salt or cocrystal of claim 1 , wherein the salt or cocrystal is contains less than 1% by weight of Polymorph B of 4-hydroxybenzoate of Compound 1.