chemistry

Oxamyl

Oxamyl 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 Oxamyl rather than just read about it. In short: Oxamyl is a chemical used as a pesticide that comes in two forms: granulated and liquid. The granulated form has been banned in the United States.

Key takeaways

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

Reference excerpt

Oxamyl is a chemical used as a pesticide that comes in two forms: granulated and liquid. The granulated form has been banned in the United States. It is commonly sold under the trade name Vydate. It is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities.

Structure and uses Oxamyl is a carbamate pesticide. According to the WHO Food and Agriculture Organization, "Oxamyl is a colourless crystalline solid with a melting point of 100-102 °C changing to a dimorphic form with a melting point of 108-110 °C. It has a slightly sulfurous odour. Oxamyl is non-corrosive. It has a specific gravity of 0.97 (25°/4°)." According to the United Nations Environment Programme, "This product is efficient in controlling most nematode species in addition to a large number of sucking and chewing insects such as aphids and thrips." Oxamyl is extremely toxic to humans whether ingested, inhaled, or contact with the skin. Its overuse can also lead to residue accumulation in food, though its chemical composition—once coming into contact with the soil—rapidly degrades. Signs of Oxamyl poisoning include: Malaise, muscle weakness, dizziness, sweating, Headache, salivation, nausea, vomiting, abdominal pain, Miosis with blurred vision, incoordination, muscle twitching and slurred speech—though symptoms can worsen with severe poisoning. According to the Food and Agriculture Organization, "Contact with the skin, inhalation of dust or spray, or swallowing may be fatal." Because of its toxicity, its use is restricted in the EU with maximum residue limits for apples and oranges being 0.001 mg/kg since 2024. This is after a 2023 review by the European Food Safety Authority identified areas of concern and chronic consumer exposure concerns.

References

External links Oxamyl in the Pesticide Properties DataBase (PPDB)

Illustrations

Worked examples

Example 1 — a first encounter with Oxamyl

Start with the simplest possible case. Write down what Oxamyl 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 Oxamyl 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 Oxamyl 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 Oxamyl

In research: Oxamyl 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 Oxamyl 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: Oxamyl is common in secondary-school and first-year university syllabi. It links to neighbouring topics Acetylcholinesterase inhibitors, Carbamate insecticides, Highly-toxic chemical substances, so understanding it makes those chapters shorter.
In everyday life: Look for Oxamyl 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 Oxamyl in 20 minutes

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

Frequently asked questions

What is Oxamyl in simple terms?

Oxamyl is a chemical used as a pesticide that comes in two forms: granulated and liquid. The granulated form has been banned in the United States.

Why does Oxamyl 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 Oxamyl?

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 Oxamyl.