tetrabromo-phenolsulfonephthalein

9.9

A dye that changes color to show acidity between pH 3.0 and 4.6

noun
/ˌtɛtrəˌbroʊmoʊ-fɪˌnoʊsʌlfəˌnɛfθəˌliːn/

Specialized

: tetrabromo-fenolsulfonftaleína

In the experiment, tetrabromo-phenolsulfonephthalein changed color as the solution became more acidic.

Examples

The laboratory technician added tetrabromo-phenolsulfonephthalein to determine the pH of the sample.
Because of its sharp transition range, tetrabromo-phenolsulfonephthalein is often preferred for precise titrations.
The solution turned pink with tetrabromo-phenolsulfonephthalein.
In the lab, we use tetrabromo-phenolsulfonephthalein to measure pH levels.
In the experiment, tetrabromo-phenolsulfonephthalein changed color as the solution became more acidic.
The laboratory technician added tetrabromo-phenolsulfonephthalein to determine the pH of the sample.
In the lab, we use tetrabromo-phenolsulfonephthalein to measure pH levels.

Synonyms

bromphenol blue

vstetrabromo-phenolsulfonephthalein

Specialized

9.6

A dye used to show if a liquid is acidic or basic

is the identical dye but given as a longer technical name

Surface Forms

tetrabromo-phenolsulfonephthalein singular

tetrabromo-phenolsulfonephthaleins plural

Morphology

tetrabromo-phenolsulfonephthalein = phenolsulfonephthalein (opaque) = tetrabromo + phenol + sulfone + phthalein

Although formed by a regular chemical prefixation (addition of tetrabromo-), the morphemes are highly specialized technical combining forms and not transparent to an average B1 learner.

Etymology

Tetrabromo-phenolsulfonephthalein is really a name made of parts that describe the chemical: tetra- means 'four', bromo- comes from the element 'bromine', sulfone is related to 'sulfur', and phthalein is a kind of dye. That's why the name tells you it is a special dye with four bromine atoms and a sulfur part, and this make-up is what makes it change color in acid, so it is used as an acid-base indicator.