Structure Data File

File Format
Name	Structure Data File
Ontology	Electronic File Formats Scientific Data formats Chemical data Structure Data File
Extension(s)	.sdf, .sd
MIME Type(s)	chemical/x-mdl-sdfile
Wikidata ID	Q28530510

The Structure Data File is one of several scientific data file formats known as SDF. It is a component of the CTab format for chemical and molecular data originally created by MDL Information Systems (MDL). For more detail, see CTab.

Specification

The current maintainer, BIOVIA, a company owned by Dassault Systèmes, publishes a specification for all its chemical table file formats, including SDF: CTFile Formats.

Identification

SDF files are a concatenation of MOL files, each of them separated by a new line and the pattern '$$$$'. Consequently, SDF files end with the hexadecimal pattern '(0D|0A|0D0A)24242424'

Sample Files

• Sample SDF files can be downloaded from the Life Chemicals website - requires registration to a free account.
• More Sample Files OTAVA chemicals