phenolphthalein


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Related to phenolphthalein: methyl orange

phenolphthalein

 [fe″nol-thal´ēn]
a cathartic and pH indicator.

phe·nol·phthal·e·in

(fē'nol-thal'ē-in, -thal'ēn),
A hydrogen ion indicator obtained by the action of phenol on phthalic anhydride; formerly used as a laxative.

phenolphthalein

/phe·nol·phthal·ein/ (fe″nol-thal´ēn) a cathartic and pH indicator, with a range of 8.5 to 9.0.

phenolphthalein

(fē′nōl-thăl′ēn′, -thăl′ē-ĭn, -thā′lēn′, -thā′lē-ĭn)
n.
A white or pale yellow crystalline powder, C20H14O4, used as an acid-base indicator, in making dyes, and formerly in medicine as an over-the-counter laxative.

phenolphthalein

[fē′nolthal′ē·in, -thā′lēn]
1 a cathartic and pH indicator with a range of 8.5 (colorless) to 9.0 (red).
2 an indicator of hydrogen ion in urine and gastric juice.

phenolphthalein

1. an acid-base indicator dye; it is colorless below pH 8.5, but turns red above pH 9.0.
2. in monogastric animals, a cathartic administered orally, usually with a bulk laxative such as agar. When ingested by ruminants causes the urine to change color to red on exposure to air.
References in periodicals archive ?
Figure 4 shows the results from a salt immersion test of steel panels coated with a clear urethane coating blended with 10 wt% of phenolphthalein encapsulated into micro-particles.
The physical and chemical parameters tested were odor, color, turbidity, magnesium hardness, calcium hardness, phenolphthalein alkalinity, chloride, dissolved oxygen, silica, ammonia, carbon dioxide, nitrate, phosphate, zinc, iron and chromate.
About 2 to 5 drops of phenolphthalein were included in this juice.
It said laboratory analysis revealed the presence of phenolphthalein and sibutramine in these capsules.
Five drops of phenolphthalein indicator were added and the suspension was immediately titrated with 0.
1M sodium hydroxide standard solution using phenolphthalein indicator.
Municipalities also issued a circular ordering the prohibition of circulation of (Japan Rapid Weight Loss Diet Pills) and withdrawal from the market as it contains the prohibited Phenolphthalein.
Phenolphthalein test conducted on the two gave positive results.
Samples were taken from the well, after the injector, after the oxidation tank, after the degas separator, from the filter body (various heights), and from filtrate I and filtrate II to measure temperature, pH, dissolved oxygen (electrode Marvet Junior 156), and dissolved carbon dioxide (HACH colorimetric express method, phenolphthalein and NaOH solution).
If 1-2 drops of phenolphthalein indicator coloured the samples in violet, then the CAACW crumbs were mixed further, prolonging the mixing by extra 15 s until they no longer changed colour (remained colourless) after an application of the indicator.
There he devised the first radiographic demonstration of the gall bladder, using iodine-labelled phenolphthalein, which is excreted in the bile and is also radio-opaque.
A phenolphthalein solution was used to check the depth of loss of alkali in the specimen termed as 'depth of dealkalization' by spraying it on freshly cut surface of specimen.