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An expert-curated chemistry database

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A chemical database that improves R&D productivity

Chemists in every field search for chemistry literature and bioactivity data with Reaxys. Query and filter for chemical substances and reactions with an intuitive interface. And discover more property types than with any other chemistry database.

Start with quick search and customize with query builder — the most powerful query engine in a chemistry database. Reaxys has the largest number of customization options and a transparent query process. You can easily follow your chosen path through to results.

Designed by chemists, Reaxys is more than a fast and flexible chemistry database. It’s a cheminformatics solution that delivers chemistry facts the way chemists need them.

Chemist in a lab

Why choose Reaxys for your chemistry research?

Reaxys is built on expert-curated chemistry information and enriched with cutting-edge technology. It is also the leading database for bioactivity data. Scientists in corporate R&D and academia gain actionable insights that lead to innovation, while saving time and money. Reaxys also supports teaching excellence in chemistry education.

Reaxys excerpts and quickly retrieves the most relevant chemical information, so you can:

  • Decide how and which compounds to make with confidence

  • Find state-of-the-art routes to synthesize molecules with superior properties

  • Discover novel molecules with improved activities against specified targets

  • Stay current with updates on new chemistry publications and patents

  • Find the most reliable vendors of starting materials and intermediates

By integrating in-house and external data, Reaxys creates a streamlined research workflow. Critical in-house knowledge becomes searchable and actionable.

A woman holding a molecule replica

What chemistry content is in Reaxys?

  • 179 million organic, inorganic and organometallic substances, including data on natural products with their species derivation

  • 72 million chemical reactions

  • 500 million published experimental facts, including substance property, spectral and reaction data

  • 86 million documents from a collection of over 16,000 chemistry-related periodicals from multiple publishers

  • 30 million patents from 105 patent offices. Titles, abstracts and claims are translated to English

  • 6 indexing sources for a cross-disciplinary view of chemistry

Reaxys also surfaces patents with biological target information and has options to purchase various datasets for applied analytics.

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How is searching in Reaxys different than searching in other chemistry databases?

Find accurate answers to chemistry questions faster than any other database:

  • Search structures, reactions, keywords and property values

  • Best-in-class predictive retrosynthesis planner

  • Normalized, linked biological information from patents and journals

  • Heatmaps showing relationships between substances and their targets

  • Structure-activity-relationships (SAR) analysis

  • More types of property and spectral data than any other chemistry database

  • Monthly updates of commercial supplier information

After searching, you can export bioactivity data to visualize and analyze in your preferred application.

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What chemistry questions are chemists answering with Reaxys?

When developing chemical compounds, chemists use Reaxys to answer questions about:

  • Synthesis planning

  • Predictive retrosynthesis

  • Commercial suppliers for starting materials

  • Analysis of physico-chemical properties

  • Compound-target affinity information

  • Toxicology data from in-vitro and in-vivo models

  • Competitive landscape

  • Novelty search

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"We always prefer research methods that get us to the answers faster: specific reaction and property searches such as can be done in Reaxys are very useful to us."

Hironao Sajiki


Hironao Sajiki

Professor at Gifu Pharmaceutical University