chemistry

Metaproscaline

Metaproscaline 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 Metaproscaline rather than just read about it. In short: Metaproscaline (MP), also known as 3,4-dimethoxy-5-propoxyphenethylamine, is a chemical compound of the phenethylamine and scaline families related to mescaline. It is the derivative of mescaline in which the methoxy group at the 3 position has been replaced with a propoxy group.

Key takeaways

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

Reference excerpt

Metaproscaline (MP), also known as 3,4-dimethoxy-5-propoxyphenethylamine, is a chemical compound of the phenethylamine and scaline families related to mescaline. It is the derivative of mescaline in which the methoxy group at the 3 position has been replaced with a propoxy group. In addition, it is a positional isomer of proscaline. In his book PiHKAL (Phenethylamines I Have Known and Loved) and other publications, Alexander Shulgin lists metaproscaline's dose as greater than 240 mg orally and its duration as unknown. The drug produced no clear effects at tested doses of up to 240 mg orally. The chemical synthesis of metaproscaline has been described. Analogues of metaproscaline include mescaline, proscaline, and metaescaline, among others. Metaproscaline was first described in the scientific literature by Shulgin and Peyton Jacob III in 1984. Subsequently, it was described in greater detail by Shulgin in PiHKAL in 1991. The drug is not a controlled substance in Canada as of 2025.

See also Scaline TWEETIO § Scalines Metaescaline Proscaline

References

External links Metaproscaline - Isomer Design Metaproscaline - PiHKAL - Erowid Metaproscaline - PiHKAL - Isomer Design

Illustrations

Worked examples

Example 1 — a first encounter with Metaproscaline

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

In research: Metaproscaline 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 Metaproscaline 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: Metaproscaline is common in secondary-school and first-year university syllabi. It links to neighbouring topics Drugs not assigned an ATC code, PiHKAL, Propoxy compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Metaproscaline 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 Metaproscaline in 20 minutes

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

Frequently asked questions

What is Metaproscaline in simple terms?

Why does Metaproscaline 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 Metaproscaline?

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 Metaproscaline.