ChemRxiv (pronounced "chem-archive") is a free online submission, distribution, and archival service for unpublished preprints in chemistry and related areas. Preprints can lead to greater reliability of research findings by fostering broad collaborations,improving the speed to sharing research findings, providing greater transparency to the communication cycle, and increasing the accessibility of findings. Preprints are not peer-reviewed, are unedited, and are not prepared for publication beyond the author's original submitted files. ChemRxiv conducts a basic screen for plagiarism, offensive language, and non-scientific content. Materials that may pose a health or other security risks, where identified, are excluded.

ChemRxiv is operated by the American Chemical Society, a non-profit and the world's largest scientific society, in collaboration with partners.


ChemRxiv accepts preprints in all areas of research in chemistry. Authors self-select the appropriate category(ies) from the following 15 options: Agriculture and food chemistry, Analytical chemistry, Biological and medicinal chemistry, Catalysis, Chemical engineering and industrial chemistry, Earth, space, and environmental chemistry, Energy, Inorganic chemistry, Materials science, Nanoscience, Organic chemistry, Organometallic chemistry, Physical chemistry, Polymer science, Chemical Education and Theoretical and computational chemistry.

Articles not relevant to the chemical sciences should be posted to complementary preprint services, such as arXiv and bioRxiv.