chemistry

Lactisole

Lactisole 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 Lactisole rather than just read about it. In short: Lactisole is the sodium salt and commonly supplied form of 2-(4-methoxyphenoxy)propionic acid, a natural carboxylic acid found in roasted coffee beans. Like gymnemic acid, it has the property of masking sweet flavors and is used for this purpose in the food industry.

Key takeaways

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

Reference excerpt

Lactisole is the sodium salt and commonly supplied form of 2-(4-methoxyphenoxy)propionic acid, a natural carboxylic acid found in roasted coffee beans. Like gymnemic acid, it has the property of masking sweet flavors and is used for this purpose in the food industry.

Chemistry Chemically, lactisole is a double ether of hydroquinone. Since it contains an asymmetric carbon atom, the molecule is chiral, with the (S)-enantiomer predominating in natural sources and being primarily responsible for the sweetness-masking effect. Commercial lactisole is a racemic mixture of the (R)- and (S)-forms.

Natural occurrences The parent acid of lactisole was discovered in 1989 in roasted Colombian arabica coffee beans in a concentration of 0.5 to 1.2 ppm.

Anti-sweet properties At concentrations of 100–150 parts per million in food, lactisole largely suppresses the ability to perceive sweet tastes, both from sugar and from artificial sweeteners such as aspartame. A 12% sucrose solution was perceived like a 4% sucrose solution when lactisole was added. However, it is significantly less efficient than gymnemic acid with acesulfame potassium, sucrose, glucose and sodium saccharin. Research found also that it has no effect on the perception of bitterness, sourness and saltiness. According to a recent study, lactisole acts on a sweet taste receptor heteromer of the TAS1R3 sweet protein receptor in humans, but not on its rodent counterpart.

As a food additive The principal use of lactisole is in jellies, jams, and similar preserved fruit products containing large amounts of sugar. In these products, by suppressing sugar's sweetness, it allows fruit flavors to come through. In the United States, lactisole is designated as generally recognized as safe (GRAS) by the Flavor and Extract Manufacturers Association (Fema number: 3773) and approved for use in food as flavoring agent up to 150 ppm. Currently, lactisole is manufactured and sold by Domino Sugar and its usage levels are between 50 and 150 ppm. In the European Union lactisole is allowed to be used as a flavouring substance in foods, FL No. 16.041.

See also Gymnemic acid Hodulcine Ziziphin

References

External links List of substances scheduled for evaluation or re-evaluation at the fifty-ninth meetingof the Joint FAO/WHO Expert Committee on Food Additives (JECFA). 2002 EAFUS: A Food Additive Database

Illustrations

Worked examples

Example 1 — a first encounter with Lactisole

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

In research: Lactisole 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 Lactisole 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: Lactisole is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Methoxyphenyl compounds, Food additives, Organic sodium salts, so understanding it makes those chapters shorter.
In everyday life: Look for Lactisole 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 Lactisole in 20 minutes

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

Frequently asked questions

What is Lactisole in simple terms?

Why does Lactisole 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 Lactisole?

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 Lactisole.