chemistry

Pirimiphos-methyl

Pirimiphos-methyl 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 Pirimiphos-methyl rather than just read about it. In short: Pirimiphos-methyl, marketed as Actellic and Sybol, is a phosphorothioate used as an insecticide. It was originally developed by Imperial Chemical Industries Ltd., now Syngenta, at their Jealott's Hill site and first marketed in 1977, ten years after its discovery.

Key takeaways

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

Reference excerpt

Pirimiphos-methyl, marketed as Actellic and Sybol, is a phosphorothioate used as an insecticide. It was originally developed by Imperial Chemical Industries Ltd., now Syngenta, at their Jealott's Hill site and first marketed in 1977, ten years after its discovery. This is one of several compounds used for vector control of Triatoma. These insects are implicated in the transmission of Chagas disease in the Americas. Pirimiphos-methyl can be applied as an interior surface paint additive, in order to achieve a residual pesticide effect.

Synthesis Pirimiphos methyl is manufactured in a two-step process in which N,N-diethylguanidine is reacted with ethyl acetoacetate to form a pyrimidine ring and its hydroxy group is combined with dimethyl chlorothiophosphate to form the insecticide.

Pyrimiphos-ethyl is a related insecticide in which the methoxy groups are replaced with ethoxy groups.

References

External links Pirimiphos-methyl in the Pesticide Properties DataBase (PPDB)

Illustrations

Worked examples

Example 1 — a first encounter with Pirimiphos-methyl

Start with the simplest possible case. Write down what Pirimiphos-methyl 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 Pirimiphos-methyl 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 Pirimiphos-methyl 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 Pirimiphos-methyl

In research: Pirimiphos-methyl 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 Pirimiphos-methyl 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: Pirimiphos-methyl is common in secondary-school and first-year university syllabi. It links to neighbouring topics Acetylcholinesterase inhibitors, Aminopyrimidines, Diethylamino compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Pirimiphos-methyl 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 Pirimiphos-methyl in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pirimiphos-methyl 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 Pirimiphos-methyl out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pirimiphos-methyl in simple terms?

Why does Pirimiphos-methyl 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 Pirimiphos-methyl?

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 Pirimiphos-methyl.