Nepedia
Back to Discover
Fluent Reader
⚛️

Citronellal

physical science Maturity 11-13 Next article →

Have you ever smelled a strong lemon scent? This smell often comes from a compound called citronellal. It is also known by the name rhodinal. This substance is a monoterpenoid aldehyde. That is a type of chemical compound. It is the main part of citronella oil. This oil gives the plant its unique smell.

Citronellal is found in many different types of plants. It is a main part of oils from Cymbopogon plants. This group includes lemon-scented gum and lemon-scented teatree. It is not in culinary lemongrass. One special version is found in kaffir lime leaves. This version is called the (S)-(−)-enantiomer. It makes up 80% of the oil in those leaves. This part creates the leaf's special aroma.

Scientists find this compound through a way called distillation. They take the oils from the plants. This process pulls the citronellal out of the leaves or stems. The oil is then used for many things. It is listed in the British Pharmacopoeia. This is a book of standards for medicines. It shows that the substance is very important.

This chemical can do many helpful jobs. It has insect repellent properties. This means it helps keep bugs away from people. Research shows it is very good at repelling mosquitoes. It also has strong antifungal qualities. This means it can stop fungi from growing. Fungi are tiny living things.

You might see citronellal in things you use every day. It is used to make flavors and perfumes. Some people might have a perfume allergy to it. It is part of a large group of things called alkenals. It also belongs to a group called monoterpenes. These are all types of chemical compounds. They help create the scents in our world.

291 words

Where will your curiosity go next?

Keep exploring at your chosen reading level.

More to explore

✨ What else?

Related topics you might enjoy

🔬 Go deeper

More advanced topics to explore

🪜 Step back

Simpler topics to build understanding

What is Nepedia?

A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.