science

Phisoderm

Phisoderm is a science 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 Phisoderm rather than just read about it. In short: Phisoderm is a skin detergent which assists persons who are allergic to soap and Phisohex, a detergent and sudsless cleanser which prevents the spread of infections. In the 1950s, both Phisoderm and Phisohex were manufactured by Winthrop Laboratories.

Key takeaways

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

Reference excerpt

Phisoderm is a skin detergent which assists persons who are allergic to soap and Phisohex, a detergent and sudsless cleanser which prevents the spread of infections. In the 1950s, both Phisoderm and Phisohex were manufactured by Winthrop Laboratories. Earlier, the product was made by Fairchild Brothers & Foster. Phisoderm was developed by B. Thurber Guild (1886–1958), a physician and pharmaceutical manufacturer. Guild practiced medicine in Boston, Massachusetts, and was a specialist in allergies. The brand is currently owned by Mentholatum.

Withdrawal from sale and reinstatement Both Phisoderm and Phisohex were removed from drugstores and retail outlet stores when the US Food and Drug Administration halted the production and distribution of products containing more than 1% of hexachlorophene in September 1972. Phisoderm continued to be produced by Winthrop Laboratories, a division of Sterling Drug, in 1980. An over-the-counter drug, its advertising was carried out by Warren Muller Dulubowsky. By April 1989, Sterling Drug was owned by Eastman Kodak. Three Sterling brands, Haley's M-O, Philips' Milk of Magnesia, and Phisoderm, were being advertised by N.W. Ayer. In 1991, the Phisoderm account was picked up by Ammirati & Puris of New York City. When Bayer bought Sterling in 1994, Chattem acquired the Phisoderm brand. In 2005, it was sold to The Mentholatum Company. In the current formulation, as of 2023, the anti-acne active ingredient is 2% salicylic acid.

References

Worked examples

Example 1 — a first encounter with Phisoderm

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

In research: Phisoderm appears in science 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 Phisoderm 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: Phisoderm is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cleaning products, Skin care, Soaps, so understanding it makes those chapters shorter.
In everyday life: Look for Phisoderm 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 Phisoderm in 20 minutes

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

Frequently asked questions

What is Phisoderm in simple terms?

Why does Phisoderm matter?

Because it connects several science 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 Phisoderm?

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 Phisoderm.