From Wikipedia, the free encyclopedia
  (Redirected from BKchem)
Jump to navigation Jump to search
BKChem v0.11.6 running on Mac OS X 10.4.8
BKChem v0.11.6 running on Mac OS X 10.4.8
Original author(s)Beda Kosata
Developer(s)Beda Kosata
Stable release
0.13.0 / February 23, 2009; 11 years ago (2009-02-23)
Preview release
0.14.0-pre2 / August 12, 2010; 10 years ago (2010-08-12)
Repository Edit this at Wikidata
Written inPython, Tcl/Tk
Operating systemWindows, OS X, POSIX
TypeMolecule editor
LicenseGNU GPL

BKChem is a free 2D molecule editor written in Python by Beda Kosata. As such, it is largely platform-independent. It uses Tk via Tkinter.

A library called OASA is available from BKChem's code base,[1] known to be used by InChI.info.

Major features[edit]

Structure drawn originally with BKChem
Redrawn because of W3C-invalidity (with Inkscape)



  • Unlimited undo/redo capabilities
  • Aligning, scaling and rotation (2D and 3D)

Exports to:


  • Molfile
  • SMILES (Stereochemistry is not supported)
  • InChI (Stereochemistry is not supported)

Other features:

  • Searching BKChem files for a molecule or a fragment of a molecule
  • Localization support (currently English, French, Czech and Polish translations are available)
  • Support for user written plugins
  • Validity checking
  • Can be run from source with Python


  1. ^ "OASA". Retrieved 29 October 2018.

External links[edit]