chemistry

Phenyl dihydrogen phosphate

Phenyl dihydrogen phosphate is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Phenyl dihydrogen phosphate rather than just read about it. In short: Phenyl dihydrogen phosphate, also known as phenyl phosphate, is a monophenyl ester of phosphoric acid, an organophosphorus compound that is an aryl-phosphate formed by the esterification of phosphoric acid with phenol. Its chemical formula is C6H7O4P.

Key takeaways

Phenyl dihydrogen phosphate belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Phenyl dihydrogen phosphate to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Phenyl dihydrogen phosphate from memory before moving on to harder problems.

Reference excerpt

Phenyl dihydrogen phosphate, also known as phenyl phosphate, is a monophenyl ester of phosphoric acid, an organophosphorus compound that is an aryl-phosphate formed by the esterification of phosphoric acid with phenol. Its chemical formula is C6H7O4P. In mice and rats it functions as a metabolite. Phenyl phosphate is the very first detectable compound into which phenol is converted when it is broken down in the absence of oxygen (for example, in the bacteria Thauera aromatica or denitrifying strains of Pseudomonas).

Physical and chemical properties Phenyl dihydrogen phosphate is a clear, colorless liquid with a characteristic odor, slightly thicker than water.

Uses It is used in manufacturing and industrial purposes, mainly as a catalyst for the production of resins and paints.

Metabolism The anaerobic degradation of phenol proceeds via its phosphorylation to phenyl phosphate, which serves as the activated substrate for subsequent carboxylation to 4-hydroxybenzoate. This initial step is catalyzed by a Mn2+ dependent phenol-phosphorylating enzyme through a mechanism involving a phosphorylated enzyme intermediatesimilar to the bacterial sugar phosphotransferase system. In beta-proteobacteria thauera aromatica the anaerobic metabolism of phenol proceeds via its conversion to phenyl phosphate by a three-component phenyl phosphate synthase, which utilizes the energy of MgATP hydrolysis. Proteins 1 and 2 catalyze the following reaction: phenol + MgATP + H2O → phenyl phosphate + MgAMP + orthophosphate, transferring the β-phosphate group to activate the substrate for subsequent carboxylation (Kolbe-Schmitt carboxylation) to 4-hydroxybenzoate; this enzymatic complex consists of three proteins structurally related to phosphoenolpyruvate synthase, enabling efficient phenol capture even at low environmental concentrations (Km 0.04 mM). In rats, after oral administration, 2-ethylhexyl diphenyl phosphate (EHDPP) is rapidly absorbed and metabolized to form the main metabolites diphenyl phosphate and phenol, as well as minor products (p-hydroxyphenylphenyl phosphate and phenyl dihydrogen phosphate), which are primarily excreted in the urine, phenyl dihydrogen phosphate is characterized as a minor product of this metabolism.

References

Illustrations

Worked examples

Example 1 — a first encounter with Phenyl dihydrogen phosphate

Start with the simplest possible case. Write down what Phenyl dihydrogen phosphate claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Phenyl dihydrogen phosphate before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Phenyl dihydrogen phosphate ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Phenyl dihydrogen phosphate

In research: Phenyl dihydrogen phosphate appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Phenyl dihydrogen phosphate in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Phenyl dihydrogen phosphate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Metabolites, Organophosphates, Phenyl compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Phenyl dihydrogen phosphate outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Phenyl dihydrogen phosphate in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Phenyl dihydrogen phosphate means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Phenyl dihydrogen phosphate out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Phenyl dihydrogen phosphate in simple terms?

Why does Phenyl dihydrogen phosphate matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Phenyl dihydrogen phosphate?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Phenyl dihydrogen phosphate.