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Phthalein dye

class of chemical compounds

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionApr 16, 2026
Entity authorityQ3381798 ↗
Source-derived summary

Phthalein dyes are a class of dyes mainly used as pH indicators, due to their ability to change colors depending on pH. They are formed by the reaction of phthalic anhydride with various phenols. They are a subclass of triarylmethane dyes.

Editorial summary

The public source identifies “Phthalein dye” as class of chemical compounds. This brief keeps that definition visible, then builds a research path around Phthalein, class and chemical.

Editorial reviewA sound reference starting point where classification, measurement and the date of the underlying evidence remain visible. The current 41-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Phthalein, class and chemical providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Phthalein dye”, the useful work is to connect “class of chemical compounds” to the records capable of establishing context and consequence.

Evidence profile

Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Apr 16, 2026. The linked authority identifier is Q3381798. None of the 0 selected statements returned an explicit reference.

Critical limits

A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.

Three-step research path

  1. Establish the record: confirm the title “Phthalein dye”, its source revision and the description used here.
  2. Expand the search: follow Phthalein dye primary sources, Phthalein dye archive and Phthalein research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

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  2. Has classification or technical consensus changed since the cited source?
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Source & attribution

This entry incorporates text from “Phthalein dye” 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.