← Back to catalogue
Research draft

epoxide

vr.tr.epoxide · PHY.MAT

Let an agent explain epoxides, relay structure, reactivity, uses and hazards from organic chemistry sources, describe the named examples and flag the loosely filed one, note ethylene oxide hazards, and distinguish epoxides from other ethers, ketones, epoxy resins as cured products and diols.

Thing Registry Physical world and living systems

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent explain epoxides, relay structure, reactivity, uses and hazards from organic chemistry sources, describe the named examples and flag the loosely filed one, note ethylene oxide hazards, and distinguish epoxides from other ethers, ketones, epoxy resins as cured products and diols.

A cyclic ether with a strained three-membered ring of two carbon atoms and one oxygen, also called an oxirane, the simplest being ethylene oxide, with examples the registry aliases name such as cyclohexene oxide and epoxyeicosatrienoic acid derivatives, which are signalling lipids, while oxalic anhydride is listed but is a different compound and appears loosely filed; the strained ring makes epoxides reactive, opening with nucleophiles, which underlies epoxy resins and many syntheses. Ethylene oxide is a flammable, toxic and carcinogenic gas used to sterilise medical equipment under strict controls, and some epoxides are reactive irritants and sensitisers, so handling needs care.

What it is for: Reactive intermediates, resins and sterilants.

It can be explain structure and reactivity; relay uses; describe named examples; note hazards.

Distinguishing features

Strained three-membered ring

High reactivity

Ring-opening reactions

Resin precursors

What it looks like

Volatile liquids or gases for simple epoxides; the ring is drawn as a triangle with an oxygen.

Physical character

ring size: 3 atoms - two carbon, one oxygen

ethylene oxide IARC: Group 1 carcinogen note

registry parent: epoxy compound note

How it is recognised

Three-membered cyclic ether

Cyclohexene oxide, oxalic anhydride, epoxyeicosatrienoic acid derivatives

Ordinary ethers have unstrained oxygen links; ketones have C=O; epoxy resins are cured polymers; diols have two hydroxyls

Related models

is a kind of - in registry terms

epoxy compound

reacts to form -

diol

is used in -

epoxy resin

is contrasted with -

ether

In practice

Families and kinds

simple epoxides such as ethylene oxide

cyclic alkene oxides

epoxy fatty acid derivatives

glycidyl compounds

Standards and regulation

Occupational limits for ethylene oxide

GHS classification for reactive and carcinogenic epoxides

Sterilisation standards for medical devices

Failure modes and hazards

Ethylene oxide toxicity and fire

Skin sensitisation from reactive epoxides

Loosely filed alias

Also called

Cyclohexene oxideoxalic anhydride5(6)-EpETrE-EA8(9)-EpETrE-EA14(15)-EpETrE-EA11(12)-EpETrE-EACyclohexene 1-oxidemupirocinepichlorohydrin2-(chloromethyl)-2-methyloxirane15,16-epoxydolabrene(3,4-epoxycyclohexyl)methyl 3,4-epoxycyclohexylcarboxylatebiogenic acyclic epoxide(−)-epichlorohydrin(+)-epichlorohydrin2-(Chloromethyl)(2-¹³C)oxiraneglycidyl ester of fatty acidepoxy fatty acidall-trans-5,6-Epoxyretinoic acidglycidyl etherglycidic acidarene epoxides2-chlorooxirane7,12-Dimethylbenz[a]anthracene 5,6-oxideoxiranolacetolactonediepoxybutane1,2-epoxy-2-methylpropanepropylene oxide3beta-hydroxy-15,16-epoxydolabreneOxirane, labeled with deuterium2-methylideneoxirane(¹³C₂)OxiranePUBCHEM_14450530Oxirane--water (1/1)2-FluorooxiraneOxirane-2-thiolOxiran-2-amineOxiran-2-yliumAluminium--oxirane (1/1)

+10

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Understand What an epoxide is.

Science.

Definition

Definition.

Definition

Definition.

  1. Is there exposure to ethylene oxide gas or a reactive epoxide, in which case follow the safety data sheet and seek medical advice for symptoms? boundary
  2. What is an epoxide, and how does it differ from other ethers, ketones, cured epoxy resins and diols? definition

Examples

Named examples.

Examples

Examples.

  1. What are cyclohexene oxide and epoxy fatty acid derivatives, and why is oxalic anhydride different? definition
  2. Which entry fits the specific compound? action
Chemistry Chemistry.

Science.

Ring strain

Ring strain.

Ring strain

Ring strain.

  1. Why does ring strain make epoxides reactive? provenance
  2. Which references are standard? provenance

Reactions

Ring-opening.

Reactions

Reactions.

  1. How do epoxides open with nucleophiles? provenance
  2. Which sources are cited? provenance
Uses Uses.

Regulation.

Resins

Epoxy resins.

Resins

Resins.

  1. How are epoxides used to make epoxy resins and adhesives? provenance
  2. Which entry fits epoxy resin? action

Sterilant

Ethylene oxide sterilisation.

Sterilant

Sterilant.

  1. How is ethylene oxide used to sterilise medical devices under controls? provenance
  2. Is the information current? boundary
Context Biology and safety.

Attribution.

Biology

Signalling lipids.

Biology

Biology.

  1. How do epoxy fatty acids act as signalling molecules, as research describes? provenance
  2. Is the presentation neutral and attributed? boundary

Hazards

Hazards.

Hazards

Hazards.

  1. Why are ethylene oxide and some epoxides hazardous? provenance
  2. Which entry fits ethylene oxide? action

What the second pass must settle

  • The registry alias oxalic anhydride should be reviewed as a different compound
  • Should ethylene oxide be a separate entry?
  • How should epoxide reactions be linked?
Draft as JSON