Qlopedia

Chemical structure database website, compounds, identifiers, spectra

Website

ChemSpider

ChemSpider is a chemical structure database website from the Royal Society of Chemistry for searching compounds, identifiers, structures, properties, spectra, and source links.

Official site
chemspider.com is the main public website for ChemSpider.
Publisher
ChemSpider is provided by the Royal Society of Chemistry.
Database focus
ChemSpider focuses on chemical structures, names, identifiers, properties, spectra, source links, and compound lookup.
The ChemSpider logo.View logo on Wikimedia Commons

What ChemSpider is

ChemSpider is a chemical structure database website at chemspider.com from the Royal Society of Chemistry. It helps users search compounds by names, identifiers, formulas, structures, and other chemical clues, then inspect records that connect structures with synonyms, properties, spectra, and external sources.

Compound records

A ChemSpider record centers on a chemical structure and the identifiers attached to it. Names, synonyms, formulas, masses, InChI strings, SMILES strings, and links to source databases help users move from a text name to a more precise molecular representation.

Search and identifiers

Chemistry search is tricky because one compound can have many names, and one name can be ambiguous. Structure search, identifier search, and careful reading of stereochemistry, charges, salts, mixtures, and source links can reduce the chance of choosing the wrong record.

Properties and spectra

ChemSpider can expose chemical properties, spectra, references, and external links when they are available. These data are useful for orientation and comparison, but values may come from different sources, prediction methods, measurement conditions, or imported records.

Developer access

ChemSpider is connected to Royal Society of Chemistry infrastructure, including developer-facing resources. Programmatic and data reuse needs depend on the available RSC services, terms, and interfaces, so software projects should check the current developer portal rather than assuming that every website feature has open API access.

Strengths and limits

ChemSpider is strong at compound lookup and identifier reconciliation, but it is not a substitute for chemical safety data sheets, regulatory databases, primary experimental papers, or expert review. Chemical identity, purity, hazards, biological activity, and legal status require context beyond a structure page.

Why it matters

ChemSpider matters because chemistry work often begins with a messy name, formula, or partial structure. A public chemical database can help students, researchers, writers, software tools, and laboratory teams connect that clue to a more precise structure and a trail of source information.

WHOIS domain data

Data pulled: June 1, 2026View current WHOIS record

Domain
chemspider.com
IP address
76.223.34.124
Registrar
DomainSpot LLC
WHOIS server
whois.domaindiscover.com
Referral URL
http://tierra.net
Created
November 3, 2006
Updated
September 8, 2025
Expires
November 4, 2027
Nameservers
a1-90.akam.net (193.108.91.90); a22-67.akam.net (23.211.61.67); a28-64.akam.net (95.100.173.64); a3-65.akam.net (96.7.49.65); a6-66.akam.net (23.211.133.66); a7-67.akam.net (23.61.199.67)
Domain status
clientTransferProhibited
Contact privacy
Registrant, administrative, and technical contact names are redacted in the Who.is record.
Registrant contact location
UK
Registrant contact email
whois [at] emailaddressprotection [dot] com