mathematics

Quinoline Yellow WS

Quinoline Yellow WS is a mathematics 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 Quinoline Yellow WS rather than just read about it. In short: Quinoline Yellow WS () is a mixture of organic compounds derived from the dye Quinoline Yellow SS (spirit soluble). Owing to the presence of sulfonate groups, the WS dyes are water-soluble (WS).

Key takeaways

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

Reference excerpt

Quinoline Yellow WS () is a mixture of organic compounds derived from the dye Quinoline Yellow SS (spirit soluble). Owing to the presence of sulfonate groups, the WS dyes are water-soluble (WS). It is a mixture of disulfonates (principally), monosulfonates and trisulfonates of 2-(2-quinolyl)indan-1,3-dione with a maximum absorption wavelength of 416 nm.p. 119

Uses Quinoline Yellow is used as a greenish yellow food additive in certain countries, designated in Europe as the E number E104. In the EU and Australia, Quinoline Yellow is permitted in beverages and is used in foods, like sauces, decorations, and coatings; Quinoline Yellow is not listed as a permitted food additive in Canada or the US, where it is permitted in medicines and cosmetics and is known as D&C Yellow 10. The Codex Alimentarius does not list it.

Health effects Quinoline Yellow WS has not been associated with any significant long-term toxicity, is not genotoxic or carcinogenic and there is no evidence of adverse effects on reproduction or development. Food colorants in general have been the subject of much scrutiny for their effect on health.

Possible cause of hyperactivity Since the 1970s and the well-publicized advocacy of Benjamin Feingold, there has been public concern that food colorings may cause ADHD-like behavior in children. These concerns have led the U.S. FDA and other food safety authorities to regularly review the scientific literature, and led the UK FSA to commission a study by researchers at the University of Southampton to assess the effect of a mixture of six food dyes (Tartrazine, Allura Red, Ponceau 4R, Quinoline Yellow WS, Sunset Yellow FCF and Carmoisine (dubbed the "Southampton 6")) and sodium benzoate (a preservative) on children in the general population, who consumed them in beverages; the study published in 2007. The study found "a possible link between the consumption of these artificial colours and a sodium benzoate preservative and increased hyperactivity" in the children; the advisory committee to the FSA that evaluated the study also determined that because of study limitations, the results could not be extrapolated to the general population, and further testing was recommended". The European regulatory community, with a stronger emphasis on the precautionary principle, required labelling and temporarily reduced the acceptable daily intake (ADI) for the food colorings; the UK FSA called for voluntary withdrawal of the colorings by food manufacturers. However, in 2009 the EFSA re-evaluated the data at hand and determined that "the available scientific evidence does not substantiate a link between the color additives and behavioral effects". On the basis of other evidence the EFSA also reduced the acceptable daily intake (ADI) from 10 to 0.5 mg/kg. The US FDA did not make changes following the publication of the Southampton study, but following a citizen petition filed by the Center for Science in the Public Interest in 2008, requesting the FDA ban several food additives, the FDA commenced a review of the available evidence, and still made no changes. No evidence supports broad claims that food coloring causes food intolerance and ADHD-like behavior in children. It is possible that certain food coloring may act as a trigger in those who are genetically predisposed, but the evidence is weak.

References

External links freepatentsonline.com - Process for purification of quinoline yellow efsa.europa.eu - EFSA updates safety advice on six food colours 091112

Illustrations

Worked examples

Example 1 — a first encounter with Quinoline Yellow WS

Start with the simplest possible case. Write down what Quinoline Yellow WS claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, 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 Quinoline Yellow WS 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 Quinoline Yellow WS 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 Quinoline Yellow WS

In research: Quinoline Yellow WS appears in mathematics 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 Quinoline Yellow WS 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: Quinoline Yellow WS is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1,3-Indandiones, E-number additives, Food colorings, so understanding it makes those chapters shorter.
In everyday life: Look for Quinoline Yellow WS 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Quinoline Yellow WS” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Quinoline Yellow WS in 20 minutes

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

Frequently asked questions

What is Quinoline Yellow WS in simple terms?

Quinoline Yellow WS () is a mixture of organic compounds derived from the dye Quinoline Yellow SS (spirit soluble). Owing to the presence of sulfonate groups, the WS dyes are water-soluble (WS).

Why does Quinoline Yellow WS matter?

Because it connects several mathematics 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 Quinoline Yellow WS?

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 Quinoline Yellow WS.