Accurate answers for chemistry research

Get accurate answers, precise data and relevant full-text literature from a unique collection that's expertly curated and indexed for maximum discoverability.

See how Reaxys can benefit your organization.

Contact us

How Reaxys delivers the right answers

Even superior search technology can only deliver all the right answers if it accesses a comprehensive collection of relevant material. With Reaxys and Reaxys Medicinal Chemistry, users can be confident that answers received are accurate and relevant.

The answers delivered by Reaxys come from an expertly curated and indexed collection of content that uniquely combines peer-reviewed literature, patents, conference abstracts, and substance data from publicly available and proprietary databases. Reaxys offers extensive coverage of authoritative information in organic, inorganic and organometallic chemistry dating as far back as 1771.

Reaxys contains:

> 105 million

organic, inorganic, and organometallic compounds

≻ 42 million

chemical reactions

> 500 million

published experimental facts

> 16,000


≻ 240

years of chemistry


indexing sources for a cross-disciplinary view of chemistry

Why Reaxys Medicinal Chemistry is a unique solution

Reaxys Medicinal Chemistry gives users access to the world’s largest and best-organized collection of medicinal chemistry content, including literature, patents and third-party databases. All the data are harmonized using Reaxys’ standards for chemicals, targets and bioactivities. Elsevier life science experts normalize the data; map concepts and glossaries; and remove inconsistent data and duplicate citations.

The essential pharmaceutical data includes:

> 33.5 million

data points

> 6.5 million

unique substances
with bioactivity

> 20,000

unique targets

> 54,000


This unique collection of data is sourced from:

> 128,000

chemistry patents

> 354,000

chemistry articles

> 5,000

drug discovery and
pharma journals

Indexing and connections for cross-disciplinary research

Many modern chemistry challenges are being addressed in cross-disciplinary research projects. To ensure that Reaxys users can get a broader picture, Reaxys content is indexed with 6 separate sources of terms.

Learn more about our indexing process

In addition, Reaxys is one of Elsevier's R&D Solutions. Embase, PharmaPendium, Scopus and ScienceDirect enable further exploration of aspects of the information contained in Reaxys.

Discover Elsevier's R&D Solutions

Content management: keeping you up-to-date

Reaxys is updated weekly. The time between date of publication and entry of information in Reaxys records varies depending on the document source and the nature of the information to be excerpted (substance, reaction or property information). In some cases, information in records appears within two weeks of publication; in other cases, information in records will be complete within two months.
See the latest content statistics

Find the latest content statistics - Reaxys | Elsevier Solutions

Excellent chemistry patent coverage

The following table summarizes the patent coverage in Reaxys:

Patent officesPeriod coveredIndexed content
Various 1803–1980
  • 1976–2001 (automatic)
  • 2001–present (manual)
English-language patents from World,
US, and European patent offices
  • 1976–2001 (automatic)
  • 2001–present (manual)
As above and:
  • Markush substance display
  • All patent family members
  • Classification codes
China, Taiwan, South Korea, Japan
patent offices in original language with
English abstracts
  • 2015–present (manual: JP, KR)
  • 2016–present (manual: CN, TW)
As for WO, US and EP patent offices

The following International Patent Classification (IPC) codes are currently indexed in Reaxys for all patent offices listed above:

  • Main IPC C07 (without C07H21 and C07K)
  • Main IPC A61K31 with secondary IPC C07
  • Main IPC A61K without A61K31 and without secondary IPC C07
  • Main IPC C09B
  • Main IPC A01N

Other more specific IPCs that are covered in Reaxys too:

  • A01N - preservation of bodies of humans, animals, plants or parts thereof, and biocides.
  • A61K - preparations for medical, dental or cosmetics.
  • C07B - general methods of organic chemistry, apparatus thereof.
  • C07C - acyclic or carbocyclic compounds.
  • C07F - acyclic or carbocyclic compounds or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium.
  • C07G - compounds of unknown constitution.
  • C07J - steroids.
  • C07H - sugars, derivatives thereof, nucleosides, nucleotides, nucleic acids (without C07H21 nucleic acids).
  • C07M - indexing scheme associated with subclasses C07B to C07K, relating to specific properties of organic compounds.
  • C09B - organic dyes or closely-related compounds for producing dyes, mordants, lakes.

Please note: Reaxys indexes example compounds (incl. associated data and reaction information) and prophetic compounds from patents. For prophetic compounds, the limit is at 500 minus the number of example compounds.

Ready to take the next step?

Contact us