Closed and moved resources

Resources that closed or moved, kept here on purpose: library guides still link to them. 5 entries, each with the closure date where an official notice gives one and where the content went.

5 entries Listed, not ranked Last verified 5 October 2026

01 · Closed and moved

Where they went

Library guides and old safety manuals still link to these addresses. Each card gives the closure date when an official notice states one, and where the content went.

chemistry.about.com

About.com (now Dotdash)

Closed May 2017

Former chemistry section of About.com; About.com renamed itself Dotdash in May 2017 and moved its content into vertical brands such as ThoughtCo (education). source

Closed: May 2017source
Where it went: Dotdash vertical brands; ThoughtCo is the education/science brand (the release does not say explicitly where chemistry content went)

Household Products Database

U.S. National Library of Medicine United States source

Closed December 2019

Former NLM database of ingredients in household products; NLM lists its content as moved to the Consumer Product Information Database (whatsinproducts.com). source

Closed: December 2019source
Where it went: Consumer Product Information Database (CPID), whatsinproducts.com, by DeLima Associates

Oxford Chemistry MSDS site (msds.chem.ox.ac.uk)

University of Oxford

Closed

Former University of Oxford chemistry safety-data (MSDS) site; the hostname no longer resolves and no retirement notice was found. source

sciencelab.com MSDS library

ScienceLab.com United States source

Closed

Former free MSDS library on sciencelab.com; the domain is now a chemical-supply web shop and the old MSDS URLs return 404. source

TOXNET

U.S. National Library of Medicine United States source

Closed December 2019

NLM toxicology database network retired on 16 December 2019; most-used content (HSDB, ChemIDplus) moved to PubChem, LactMed and LiverTox to NCBI Bookshelf. source

Closed: December 2019source
Where it went: PubChem, PubMed and NCBI Bookshelf (some databases moved to outside providers or were retired)
Old address: www.nlm.nih.gov/toxnet/index.html

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