fatty acid
Let an agent explain what fatty acids are and how they are classified, relay nutritional and industrial information from reference and health sources in general terms, distinguish them from fats, oils and lipids as wholes, and route personal dietary advice to professionals.
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 what fatty acids are and how they are classified, relay nutritional and industrial information from reference and health sources in general terms, distinguish them from fats, oils and lipids as wholes, and route personal dietary advice to professionals.
A carboxylic acid with a long aliphatic chain, saturated or unsaturated, typically with an even number of carbon atoms from four to twenty-eight; fatty acids are the building blocks of fats, oils and membrane lipids, an energy store and fuel in organisms, and raw materials for soaps, detergents and oleochemicals.
What it is for: Energy storage, membranes and signalling in organisms; oleochemical feedstock in industry.
It can be explain structure and classification; identify a fatty acid by name, chain length and saturation; relay nutritional guidance in general terms; explain industrial uses.
Distinguishing features
Carboxylic acid with an aliphatic tail
Saturated, monounsaturated or polyunsaturated
Omega numbering for double bond position
Essential fatty acids cannot be made by the body
What it looks like
Waxy solids or oily liquids depending on chain length and saturation; not visible as such in foods.
Physical character
chain length: 4-28 carbon atoms - commonly 12-22 in foods
melting point of stearic acid: about 69 degrees C - saturated C18
melting point of oleic acid: about 13 degrees C - monounsaturated C18:1
How it is recognised
Carboxyl group on a long hydrocarbon chain
Named by chain length and double bonds, such as C18:1
A fat or oil is a triglyceride of fatty acids, a different entry
Related models
is a kind of - the chemical class
is part of - fats and oils are esters of fatty acids
is part of - the broader class
is studied by - dietary role
In practice
Families and kinds
saturated fatty acids such as palmitic and stearic
monounsaturated such as oleic
polyunsaturated omega-3 and omega-6 such as linoleic, alpha-linolenic, EPA and DHA
trans fatty acids
short and medium chain fatty acids
branched and hydroxy fatty acids
Identifiers
lipid number C18:1 style chain length and double bonds
CAS number per acid for example 112-80-1 for oleic acid
IUPAC name per acid systematic naming
Standards and regulation
Dietary guidelines on saturated and trans fats from health authorities
Food labelling rules for fat content
Codex and ISO methods for fatty acid analysis
Failure modes and hazards
Rancidity through oxidation of unsaturated acids
Health effects of high trans and saturated fat intake as described by authorities
Agents giving personal dietary advice
Confusing fatty acids with fats
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.fatty-acid
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Chemistry What fatty acids are.
Structure.
Structure
Structure and naming.
Structure
Structure.
- What is the structure of a fatty acid, and how are chain length and saturation named? definition
- Is the question about a fatty acid, a fat, or a lipid class? boundary
Properties
Physical properties.
Properties
Properties.
- How do melting point and oxidation depend on chain length and saturation? measurement
- Which entry fits a specific acid? action
Biology Role in organisms.
Biology.
Metabolism
Metabolism.
Metabolism
Metabolism.
- How are fatty acids synthesised, stored and oxidised for energy? provenance
- Which entry fits lipid metabolism? action
Membranes
Membranes and signalling.
Membranes
Membranes.
- What roles do fatty acids play in membranes and signalling? provenance
- Which references are standard? provenance
Nutrition Diet and health.
General guidance only.
Diet
Dietary sources and guidance.
Diet
Diet.
- What do health authorities say about saturated, unsaturated, trans and essential fatty acids? provenance
- Is the user asking for personal dietary advice, which needs a professional? boundary
Labelling
Labels and analysis.
Labelling
Labelling.
- How is fatty acid content measured and labelled on foods? measurement
- Which entry fits food labelling? action
Industry Oleochemicals.
Industry.
Uses
Industrial uses.
Uses
Uses.
- How are fatty acids used in soaps, detergents, lubricants and biodiesel? provenance
- Which entry fits oleochemistry? action
Supply
Sources and trade.
Supply
Supply.
- From which crops and animal fats are fatty acids obtained, and what sustainability debates exist, with attribution? provenance
- Is the presentation neutral? boundary
What the second pass must settle
- Should individual fatty acids be separate entries?
- How should dietary guidelines be linked by country?
- How should analytical methods be represented?