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Phenolphthalein (/fɛˈnɒl(f)θəliːn/[citation needed] feh-NOL(F)-thə-leen) is a
chemical compound with the
formula C20H14O4 and is
often written as "HIn"...
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blood test,
first described in 1903, in
which the
chemical indicator phenolphthalein is used to
detect the
possible presence of hemoglobin. It
relies on...
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precise amount of the
analyte and a
small amount of
indicator (such as
phenolphthalein)
placed underneath a
calibrated burette or
chemistry pipetting syringe...
- 1933. A
universal indicator is
usually composed of water, 1-propanol,
phenolphthalein,
sodium hydroxide,
methyl red,
bromothymol blue,
sodium bisulfite,...
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ranges and
colour transformations ****ociated with
specific indicators:
Phenolphthalein is
widely recognized as one of the most
commonly used acid-base indicators...
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indicator is a
solution containing pot****ium hexacyanoferrate(III) and
phenolphthalein. It
turns blue in the
presence of Fe2+ ions, and pink in the presence...
- used as a
laxative in 1953
because of its
structural similarity to
phenolphthalein. It is on the
World Health Organization's List of
Essential Medicines...
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structure affects a chromop**** in the pH
indicator molecule. For example,
phenolphthalein is a pH
indicator whose structure changes as pH
changes as
shown in...
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during World War I. In
World War II,
neutral or
acidic solutions of
phenolphthalein, a
chemical compound extracted from
pills for constipation, were used...
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chemical reaction. It can be
found by
means of an indicator, for
example phenolphthalein or
methyl orange. The
endpoint (related to, but not the same as the...
