chemistry

Pigment Yellow 97

Pigment Yellow 97 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 Pigment Yellow 97 rather than just read about it. In short: Color Index Pigment Yellow 97 is widely used as a yellow colorant, and is classified as an arylide yellow. It is distinguished by the presence of a sulfonylaminophenyl group, which renders the material particularly insoluble (resistant to migration).

Key takeaways

Pigment Yellow 97 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Pigment Yellow 97 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Pigment Yellow 97 from memory before moving on to harder problems.

Reference excerpt

Color Index Pigment Yellow 97 is widely used as a yellow colorant, and is classified as an arylide yellow. It is distinguished by the presence of a sulfonylaminophenyl group, which renders the material particularly insoluble (resistant to migration).

Properties Pigment Yellow 97 exhibits extremely high light fastness and weather fastness. Its resistance to organic solvents and its recoatability are superior to those of other monoazo pigments. The presence of an N-phenylsulfonamide group improves migration fastness. Although the compound is often depicted as an azo compound, X-ray crystallography shows that the hydrazone form is favored as a result of azo-hydrazo-tautomerism.

Production It is derived from two fairly complicated precursors. The acetoacetanilide component is made from 2,5-dimethoxy-4-chloroaniline. The azo component is made from a dimethoxyaniline with the sulfonylaminophenyl substituent. The compound is obtained via acetoacetylation of o-tolidine using diketene. The resulting bisacetoacetylated compound is coupled with two equiv of the diazonium salt obtained from 2,4-dichloroaniline. Arylide yellow pigments are obtained by acetoacetylation of an aromatic amine with diketene, followed by reaction with a diazo component in an azo coupling to form the pigment. Pigment Yellow 97 (6) is produced by diazotization of 4-amino-2,5-dimethoxy-N-phenylbenzenesulfonamide (1) and subsequent coupling of the diazo component (2) with 4-chloro-2,5-dimethoxyacetoacetanilid (5). The coupling component is obtained by reaction of diketene (4) with 2,5-dimethoxy-4-chloroaniline (3).

Use Pigment Yellow 97 is used in a wide range of applications. In the field of paints, it is suitable for industrial coatings in pastel color shades and for automotive refinish paints used as tinting colors. In emulsion paint, it can also be used for outdoor applications. In the printing ink sector, it is primarily used for high-quality printed products with stringent fastness requirements. Another area of application is plastics, for example in transparent and opaque colorations in rigid PVC. Pigment Yellow 97 is also used for pigmenting epoxy resins and resins based on unsaturated compounds polyesters, as well as printer inks.

References

Illustrations

Worked examples

Example 1 — a first encounter with Pigment Yellow 97

Start with the simplest possible case. Write down what Pigment Yellow 97 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 Pigment Yellow 97 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 Pigment Yellow 97 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 Pigment Yellow 97

In research: Pigment Yellow 97 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 Pigment Yellow 97 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: Pigment Yellow 97 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anilines, Arylide pigments, Chloroarenes, so understanding it makes those chapters shorter.
In everyday life: Look for Pigment Yellow 97 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 Pigment Yellow 97 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pigment Yellow 97 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 Pigment Yellow 97 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pigment Yellow 97 in simple terms?

Why does Pigment Yellow 97 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 Pigment Yellow 97?

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 Pigment Yellow 97.