sulfur
Let an agent identify sulfur and its properties, relay production, uses, isotopes and biological roles from reference sources, relay safety and environmental information such as sulfur dioxide emissions, and distinguish it from its compounds.
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 identify sulfur and its properties, relay production, uses, isotopes and biological roles from reference sources, relay safety and environmental information such as sulfur dioxide emissions, and distinguish it from its compounds.
A chemical element with symbol S and atomic number 16, a yellow, brittle, non-metallic solid at room temperature that forms many allotropes and occurs in nature as the element, in sulfide and sulfate minerals and in fossil fuels; sulfur is produced mainly by recovery from oil and gas, is used chiefly to make sulfuric acid, fertilisers, rubber and chemicals, and is essential to life in amino acids and proteins.
What it is for: Sulfuric acid, fertilisers, rubber and chemicals.
It can be relay properties, allotropes and isotopes; explain production and uses; relay safety and environmental information; distinguish element from compounds.
Distinguishing features
Yellow non-metal
Many allotropes
Essential element
Sulfuric acid feedstock
What it looks like
A bright yellow crystalline or powdery solid, odourless when pure, burning with a blue flame.
Physical character
atomic number: 16 Z
standard atomic weight: 32.06 u
melting point: 115.2 degrees C - alpha form
density: 2.07 g/cm3 - alpha form
How it is recognised
Element 16, symbol S
Yellow non-metal with many allotropes
Sulfur compounds such as sulfides and sulfates are separate entries
Related models
is a kind of - in registry terms
is a kind of - group 16
is used to make - the main use
is adjacent to - element 15
In practice
Families and kinds
allotropes such as alpha and beta orthorhombic and monoclinic sulfur
isotopes from sulfur-26 to sulfur-49, with four stable isotopes
elemental and recovered sulfur
sulfur in biology and geochemistry
Identifiers
symbol S
CAS 7704-34-9
Standards and regulation
Air quality rules on sulfur dioxide
Fuel sulfur limits for vehicles and shipping
Chemical safety data sheets
Fertiliser regulations
Failure modes and hazards
Sulfur dioxide from combustion and acid rain
Dust fire and explosion
Hydrogen sulfide in production
Confusion with compounds
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.sulfur
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Identify What sulfur is.
Identity.
Properties
Properties and allotropes.
Properties
Properties.
- What are the properties and allotropes of sulfur? definition
- Is the question about the element or a compound? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and how are they used in geochemistry? definition
- Which entry fits the specific isotope? action
Industry Production and uses.
Supply.
Production
Production.
Production
Production.
- How is sulfur produced, from Frasch mining to recovery from oil and gas, and who produces it, with sources? provenance
- Which sources are cited? provenance
Uses
Uses.
Uses
Uses.
- How is sulfur used in sulfuric acid, fertilisers, rubber and other products? provenance
- Which entry fits sulfuric acid? action
Environment Environment and biology.
Science.
Emissions
Emissions.
Emissions
Emissions.
- How do sulfur emissions cause acid rain and pollution, and how are they regulated? provenance
- Which entry fits sulfur dioxide? action
Biology
Biological role.
Biology
Biology.
- What role does sulfur play in proteins, metabolism and the sulfur cycle? provenance
- Which references are standard? provenance
Context History and safety.
Context.
History
History.
History
History.
- How was sulfur known and used from antiquity, and when was it recognised as an element? provenance
- Which entry fits the history of chemistry? action
Safety
Safety.
Safety
Safety.
- What hazards does sulfur present, and what handling rules apply? provenance
- Is the user asking about a personal exposure, which needs a clinician or poison centre? boundary
What the second pass must settle
- Should allotropes and isotopes be separate entries?
- How should reference data be linked?
- The registry entry has merged aliases naming isotopes and allotropes; should they be split off?