US Patent 10174362 Nucleic acid preservation solution and methods of manufacture and use

Disclosed is nucleic acid preserving compositions and methods of manufacturing and using the same. Compositions include a carrier, a chaotropic agent, a buffering agent, a chelating agent, a surfactant, an alcohol, an acid, and a mucolytic agent. Compositions as aqueous solutions can include water as a carrier. Preferred embodiments include water, guanidine thiocyanate, Tris, EDTA, SLS, SDA 3C, HCl, and N-acetyl-L-cysteine. Some embodiments include a colored dye as a visual indicator. Methods of manufacturing include combining the components into a mixture, such as an aqueous solution. Methods of use include providing a biological sample that includes nucleic acid and contacting the biological sample with the composition. Kits include the composition disposed in a portion of a biological sample collection apparatus.