Difference between revisions of "Cresol purple"

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A purplish crystalline powder used as an [[indicator dye|acid-base indicator]]. Cresol purple changes from red to yellow over a pH range of 1.2 -1.8 and changes again from yellow to purple from pH 7.4 - 9.0.
 
A purplish crystalline powder used as an [[indicator dye|acid-base indicator]]. Cresol purple changes from red to yellow over a pH range of 1.2 -1.8 and changes again from yellow to purple from pH 7.4 - 9.0.
 
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[[[SliderGallery rightalign|cresol purple.jpg~Chemical structure]]]
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
 
meta-cresolsulfonphthalein; m-cresol purple; púrpura de m-cresol (Esp.); porpora cresolo (It.)
 
meta-cresolsulfonphthalein; m-cresol purple; púrpura de m-cresol (Esp.); porpora cresolo (It.)
  
[[[SliderGallery rightalign|cresol purple.jpg~Chemical structure]]]
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== Risks ==
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* Inhalation, ingestion and contact may cause irritation and redness. 
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* ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC228200050&productDescription=META-CRESOL+PURPLE%2C+INDI+5GR&vendorId=VN00032119&countryCode=US&language=en SDS]
  
== Other Properties ==
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==Physical and Chemical Properties==
  
 
Soluble in ethanol, water, dilute acid and dilute alkalis.
 
Soluble in ethanol, water, dilute acid and dilute alkalis.
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== Hazards and Safety ==
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==Resources and Citations==
 
 
Inhalation, ingestion and contact may cause irritation and redness. 
 
 
 
Mallinckrodt Baker: [http://www.jtbaker.com/msds/englishhtml/c5522.htm MSDS]
 
 
 
== Sources Checked for Data in Record ==
 
  
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993

Latest revision as of 12:52, 7 July 2022

Description

A purplish crystalline powder used as an acid-base indicator. Cresol purple changes from red to yellow over a pH range of 1.2 -1.8 and changes again from yellow to purple from pH 7.4 - 9.0.

Chemical structure

Cresol purple.jpg

Synonyms and Related Terms

meta-cresolsulfonphthalein; m-cresol purple; púrpura de m-cresol (Esp.); porpora cresolo (It.)

Risks

  • Inhalation, ingestion and contact may cause irritation and redness.
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in ethanol, water, dilute acid and dilute alkalis.

Composition C21H18O5S
CAS 2303-01-7
Molecular Weight mol. wt. = 382.44

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
  • Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC: formula= C21H18O5S, CAS= 2303-01-7