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Chemical Drawing Atlas

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Chem4Word

A Microsoft Word add-in for drawing and editing chemical structures and reactions in documents.

WebsiteManualGitHub

Open source. 30 of 65 checklist features confirmed.

Official demo

Adding chemical reactions in Chem4Word, published by Chemistry For Word, linked from chem4word.co.uk

Main canvas

Needs Windows

light mode

Needs Windows

dark mode

Default drawings

Needs Windows

Caffeine

Needs Windows

Paclitaxel

Needs Windows

Cholesterol in 3D

Facts

GitHub stars
16 stars on 6 Nov 2026
First commit
19 Aug 2022
Repository activity
177 commits, 2 contributors, last push 5 Nov 2026
Latest version
V3.3.17
Runs on
Windows
License
Apache 2.0; bundled ChemDoodle Web files use GPLv3.
Price
Free
Relies on
No third-party engine found. Current ACME canvas is original; ChemDoodle license notice references an absent legacy ZIP.
Draws with
WPF DrawingVisual/DrawingContext in the editor; OOXML DrawingML in Word documents
Chemistry from
In-house Chem4Word.Model2; online services for names and identifiers
Interface
WPF/XAML and Windows Forms; Microsoft Word VSTO add-in
Main language
C#
Other languages
C: Native SQLite structure library storage
Renderer
Original: Chem4Word ACME (WPF DrawingVisual) and OoXmlV4 (DrawingML)
Third-party licenses
MIT/Apache-2.0/BSD-3-Clause/MS-PL dependencies, public-domain SQLite and CC0 oils data; proprietary Microsoft VSTO terms; Arial glyph-data license unspecified.

Features

  • Tested by running it
  • Seen in the app
  • The manual says yes
  • Partly, with the reason shown
  • Not supported
  • Not established, which is not the same as no

Select a mark for its proof. A filled mark opens our screenshot, or the manual if the check left nothing to picture. A ring opens the manual.

Drawing structures

APIs and automation

Embedding and extension

Open the full pageManual