Phthalates
Any ester derived from phthalic acid
Phthalates (US: UK: THAL-ates ), or phthalate esters, are esters of phthalic acid. They are colorless, odorless, oily compounds, although commercial samples can be yellowish with faint odors. Being fairly chemically inert and easily produced, they are widely used as plasticizers, i.e., substances added to polymers to increase their flexibility, transparency, durability, and longevity. They are used primarily to soften polyvinyl chloride (PVC). While phthalates are commonly used as plasticizers, not all plasticizers are phthalates. The two terms are specific, unique, and not used interchangeably.
The use of phthalate plasticizers has had a profound effect on the commercialization of PVC, promoting its use for major industrial and consumer applications where flexibility is required, such as for tubing, siding, packaging and wire sheathing.
Phthalates are controversial because, when ingested, they pose a threat as endocrine disruptors. Consequently their use is regulated, e.g. in the United States, Canada, and European Union.
“Phthalates” enters the record as any ester derived from phthalic acid. Crown Archives preserves that source wording while asking what Phthalates, ester and derived can confirm, complicate or overturn.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 21, 2026. The linked authority identifier is Q84483575. The Library of Congress control number is sh87003034. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Phthalates” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.