Making an old pain and fever medication

TL;DR

Acetanilide, once sold as a fever and pain medication, was later replaced by acetaminophen due to its toxicity. Acetanilide is used today as a precursor chemical for dyes and pharmaceuticals.

Transcript

At one point, acetanilide was sold as a fever and pain reducing medication under the brand name Antifebrin. However, due to toxicity issues, it was eventually taken off the market. Nowadays, Antifebrin and other related medications have been completely replaced by acetaminophen. Also known as paracetamol or Tylenol. It was eventually discovered tha... Read More

Key Insights

• ❓ Acetanilide was once marketed as a medication under the brand name Antifebrin but was later replaced by acetaminophen due to its toxicity.
• ❓ Acetanilide is now primarily used as a chemical precursor in the production of dyes and pharmaceuticals.
• 💦 The purification of aniline through vacuum distillation helps remove impurities and excess water.
• 💁 The addition of sodium acetate in the reaction mixture facilitates the formation of acetanilide through an equilibrium reaction.
• 😎 Cooling the reaction mixture to 0°C enhances the precipitation of acetanilide for easier separation.
• ❓ The purification of acetanilide through recrystallization improves its overall purity.
• 🔮 The final yield of acetanilide crystals was 21.4 grams, with a yield of 74%.

Questions & Answers

Q: Why was acetanilide replaced by acetaminophen as a fever and pain medication?

Acetanilide was discovered to be ineffective at relieving pain and fever and posed serious toxicity risks. Acetaminophen was found to be a safer and more effective alternative.

Q: What is acetanilide primarily used for today?

Acetanilide is used as a chemical precursor for the production of dyes and pharmaceuticals.

Q: How is acetanilide purified before further reactions?

To purify acetanilide, it can be subjected to vacuum distillation to remove impurities and excess water, ensuring a higher quality product.

Q: What is the purpose of adding sodium acetate in the preparation of acetanilide?

Sodium acetate is added to establish equilibrium with aniline hydrochloride, allowing the release of aniline for further reaction with acetic anhydride to form acetanilide.

Summary & Key Takeaways

• Acetanilide, previously sold as a medication called Antifebrin, was found to be ineffective and toxic. Acetaminophen (Tylenol) replaced it as a safer alternative.

• Acetanilide is now primarily used as a chemical precursor for dyes and pharmaceuticals.

• The video demonstrates the purification and preparation of acetanilide through a series of reactions involving aniline, acetic anhydride, muriatic acid, and sodium acetate.