Amorphous sodium 4-[4-chloro-2-hydroxybenzoyl)amino]butanoate

1. Amorphous sodium 4-[(4-chloro-2-hydroxybenzoyl)amino]butanoate.

2. A pharmaceutical composition comprising

(a) the amorphous sodium 4-[(4-chloro-2-hydroxybenzoyl)amino]butanoate of claim 1 ; and

(b) a biologically active agent.

3. The pharmaceutical composition of claim 2 , wherein the biologically active agent comprises at least one protein, polypeptide, peptide, hormone, polysaccharide, mucopolysaccharide, small polar organic molecules, carbohydrate, or lipid.

4. The pharmaceutical composition of claim 2 , wherein the biologically active agent is selected from the group consisting of growth hormones, human growth hormones (hGH), recombinant human growth hormones (rhGH), bovine growth hormones, porcine growth hormones, growth hormone-releasing hormones, interferons, α-interferon, β-interferon, γ-interferon, interleukin-1, interleukin-2, insulin, porcine insulin, bovine insulin, human insulin, human recombinant insulin, insulin-like growth factor (IGF), IGF-1, heparin, unfractionated heparin, heparinoids, dermatans, chondroitins, low molecular weight heparin, very low molecular weight heparin, ultra low molecular weight heparin, calcitonin, salmon calcitonin, eel calcitonin, human calcitonin, erythropoietin (EPO), atrial naturetic factor, antigens, monoclonal antibodies, somatostatin, protease inhibitors, adrenocorticotropin, gonadotropin releasing hormone, oxytocin, leutinizing-hormone-releasing-hormone, follicle stimulating hormone, glucocerebrosidase, thrombopoietin, filgrastim, prostaglandins, cyclosporin, vasopressin, cromolyn sodium, sodium chromoglycate, disodium chromoglycate, vancomycin, desferrioxamine, bisphosphonates, alendronate, tiludronate, etidronate, clodronate, pamidronate, olpadronate, incadronate, BIBN-4096BS, parathyroid hormone, fragments of parathyroid hormone, antimicrobials, daptomycin, anti-fungal agents, vitamins, analogs, fragments, mimetics and polyethylene glycol-modified derivatives of these compounds, and any combination thereof.

5. The pharmaceutical composition of claim 2 , wherein the biologically active agent is insulin.

6. A dosage unit form comprising:

(A) the pharmaceutical composition of claim 2 ; and

(B) (a) an excipient

(b) a diluent,

(c) a disintegrant,

(d) a lubricant,

(e) a plasticizer,

(f) a colorant,

(g) a dosing vehicle, or

(h) any combination thereof.

7. A dosage unit form comprising:

(A) the pharmaceutical composition of claim 5 ; and

(B) (a) an excipient

(b) a diluent,

(c) a disintegrant,

(d) a lubricant,

(e) a plasticizer,

(f) a colorant,

(g) a dosing vehicle, or

(h) any combination thereof.

8. A method of administering an active agent to an animal in need thereof, the method comprising the step of administering the pharmaceutical composition of claim 2 to the animal.

9. A method of treating diabetes in an animal in need thereof, comprising the step of administering the pharmaceutical composition of claim 5 to the animal.

10. A method of treating diabetes in a human in need thereof, comprising the step of administering the pharmaceutical composition of claim 5 to the human.

11. A method of preparing amorphous sodium 4-[(4-chloro-2-hydroxybenzoyl)amino]butanoate comprising the step of solidifying a melt of sodium 4-[(4-chloro-2-hydroxybenzoyl)amino]butanoate.

12. A method of preparing amorphous sodium 4-[(4-chloro-2-hydroxybenzoyl)amino]butanoate comprising the step of lyophilizing sodium 4-[(4-chloro-2-hydroxybenzoyl)amino]butanoate.

13. A method of preparing amorphous sodium 4-[(4-chloro-2-hydroxybenzoyl)amino]butanoate comprising the step of recrystallizing sodium 4-[(4-chloro-2-hydroxybenzoyl)amino]butanoate in an aqueous alcohol solution, where the molar ratio of alcohol to water is greater than 1.

14. The method of claim 13 , wherein the molar ratio is greater than 10.