Frequently Asked Questions

1. Are preprints posted on ChemRxiv peer-reviewed? Are they checked prior to publication?

Preprints posted on ChemRxiv are not peer-reviewed, edited, or typeset. All preprints are subject to a basic screening following submission for plagiarism, offensive, dangerous, and/or non-scientific content. The organizers of ChemRxiv provide no endorsement to any information in or linked from the preprints.

2. What is a preprint?

Generally speaking, a preprint is a freely accessible preliminary communication that contains new research findings and data not yet published in a peer-reviewed outlet, such as a journal. A draft or final version may be submitted, so long as the preprint’s content is not yet published at submission and all the authors consent to the posting.

3. What type of information is posted on ChemRxiv?

ChemRxiv is a preprint server intended for the posting of technical, scientific information spanning the chemical and related sciences. News, advertisements, policy statements are not appropriate for posting and will be declined. Findings clearly falling into the physics, math, or life science fields with no connections to the chemical sciences should be submitted to similar resources, such as arXiv or bioRxiv.

4. Is there a fee to submit or read a preprint on ChemRxiv?

Preprints on ChemRxiv are free for authors to post and free to readers.

5. How long does it take from submission to posting on ChemRxiv?

Preprints are typically posted within 1 - 2 business days after submission.

6. What file formats may I submit for a preprint on ChemRxiv? What file formats may I download from a preprint posted on ChemRxiv?

Authors may submit any file format up to 5GB to ChemRxiv through the simple submission drag/drop process. This is a unique feature for preprint servers; ChemRxiv is pleased to offer functionality that preserves the information available in the original files for authors and readers. Original file formats are preserved through the checking and posting process, may be viewed by all readers on ChemRxiv through a special web browser viewing tool, and are available for download. ChemRxiv requests that authors also create and submit a PDF version alongside the original file(s) to assist readers who wish to download a PDF; if a PDF is not submitted, ChemRxiv will make every effort to create a PDF version for users to download and will post this PDF alongside the original files without an author proofing process.

Authors should also utilize appropriate subject repositories where available and link to those repositories; the location of related files in other repositories will be linked directly from the ChemRxiv record when the author includes such links in the “Reference” input on the submission form. Examples include Protein Data Bank (PDB) and Cambridge Crystallographic Data Centre (CCDC).

7. Can I post a preprint in any language?

English is the only language accepted at this time.

8. What happens once I submit my preprint to ChemRxiv prior to posting?

ChemRxiv has a triage process in place that every preprint undergoes. All preprints are screened for plagiarism, offensive, dangerous, and/or non-scientific content. Ph.D. chemists are engaged in the triage process; however, this process is not peer review; no assessment is made of the accuracy, completeness, or import of the science presented. The goal of a preprint server is to post scientific findings quickly for broader discussion by the community.

In cases where authors do not include a PDF version alongside original files, ChemRxiv administrators also create a PDF version for posting and download by readers without additional author proofing. ChemRxiv retains the right to deny posting any preprint deemed inappropriate by the ChemRxiv administrators.

9. I have already submitted my article to a journal. Can I also submit to ChemRxiv?

Preprints must be submitted to ChemRxiv before acceptance by a journal. Articles that are submitted to journals, but not yet accepted, can be submitted to ChemRxiv. However, it is the authors’ responsibility in this unusual case to check with the journal Editor and ensure that submission to ChemRxiv will not interfere with the journals’ prior publication policies, or have an impact on the manuscript already under review at the journal.

10. Can I remove a preprint that is already posted on ChemRxiv?

No. Preprints receive DOI's during the ChemRxiv posting process. Preprints are fully citable and part of the scientific record, including being indexed by Chemical Abstracts Services, CrossRef, and Google Scholar. Ethical publication guidelines require that files are preserved. ChemRxiv retains the right to remove any preprint in cases of copyright infringement or other issues that the preprint server’s management deems critical.

11. Is there an open API for ChemRxiv?

Yes, ChemRxiv is Open API compatible; you can review the full documentation, or download the Open API Swagger specification. Additionally, ChemRxiv will support OAuth 2.0 Authorization Framework; of note, the ChemRxiv specific OAuth tokens are not yet available, coming soon.

12. What is the Impact Factor of ChemRxiv? What other metrics are available for ChemRxiv? Where are ChemRxiv preprints indexed?

ChemRxiv is not a journal, it is a preprint service. As a result, ChemRxiv, like other preprint servers such as arXiv and bioRxiv, does not have an impact factor.

Preprint based usage and Altmetrics (tracking attention to the preprint based on blogs, tweets, news articles, and other media) are updated in real time, and can be found on the right side of the preprint record.

ChemRxiv preprints are indexed by Chemical Abstracts Services, Google, Google Scholar, CrossRef, and other search tools. Preprints are not indexed by Web of Science.

13. Who determines how ChemRxiv will operate and the specific details?

A broad consultation took place to shape the scope, governance and operating principles for ChemRxiv as a community centric endeavor. This consultative process included input from the ACS, RSC and GDCh, along with other preprint services, not for profit organizations, chemistry community members writ large, publishers, and funding agencies. This helped identify the specific requirements for launching ChemRxiv, is a continuing process, and will guide the next steps of the service that will come.

We are in the final stages of forming both a Governance and Scientific Board, with responsibility to oversee the strategic direction for ChemRxiv. More information will be forthcoming in the next months.

A group of Ph.D. chemists employed by or contracted by ChemRxiv are engaged in the triage process, as discussed in question 8 above. Additionally, a Publishing Manager for ChemRxiv is currently being recruited to oversee the day-to-day operations.

14. Is ChemRxiv a regional or global service?

ChemRxiv is open to all interested authors for submissions and will be available globally for downloading and viewing files for all interested readers.

15. What are the benefits of a chemistry preprint server to authors?

A chemistry preprint server enables researchers working across diverse areas of inquiry to share early results and data with their scientist colleagues ahead of formal peer review and publication, to elicit informal feedback from other scientists to help in shaping their work, to allow authors the option of establishing priority, and to advance the pace of scientific discovery and dissemination.

16. Do journals in chemistry allow authors who have posted preprints to submit to the journal?

Today, the majority of journals in the chemistry space allow authors to first post preprints. You can find this information in the journals’ policies, most often prior publication or preprint policies, or by reaching out to the journal editor. Researchers may also find the information available here useful in assessing publisher policies.

17. Why is there a need for a chemistry-specific preprint server? Can’t chemists utilize arXiv or bioRxiv?

Chemistry is the central science. We believe each major discipline will ultimately have a discipline-specific preprint server. While we are engaged in efforts to find commonalities with arXiv, bioRxiv, and are exploring leveraging common resources and tools, we recognize that chemistry authors and readers will benefit from a space dedicated to their field and their needs, as our colleagues at arXiv have for physics and math, and bioRxiv for the life sciences.

18. How do I revise my preprint or correct errors?

A preprint submitted to ChemRxiv can be revised at any time until posting.

Once posted, authors may submit a revision by logging into their account and going to My Submissions at any time, then choosing the appropriate preprint to submit modifications.

Please note – revisions submitted as such will be posted under the same DOI as the original preprint unless ChemRxiv’s management deems the changes to be substantial warranting a new preprint. All original files will remain accessible in earlier versions, with appropriate time/date stamps.

19. How will the preprint on ChemRxiv be linked to a related journal article once published?

ChemRxiv plans to add a link to the preprint within a few weeks of journal publication. The timing depends on when the journal posts its’ files to CrossRef, allowing ChemRxiv to check and make matches between preprints and published articles.

20. Does ChemRxiv allow text data mining? If so, under what terms?

ChemRxiv does allow metadata mining and allows all associated files to be downloaded. Interested users should refer to the Open API documentation.

The terms applicable to the mining of preprints are determined by the authors’ selection of a Creative Commons license – including CC-BY-NC-ND, CC-BY-NC, and CC-BY. Interested parties may limit searches to specific license types to meet their specific reuse needs.