Why lemongrass cleans: the chemistry behind our signature note

Ask anyone what they remember about our floor cleaner and the answer is usually the same: the lemongrass. That bright, green, just-cut freshness that hangs in the air for a few minutes after mopping and then settles into something quieter. It’s easy to assume the scent is decoration — a pleasant finish sprayed over the “real” formula. It isn’t. The compound responsible for that fragrance is also one of the most studied botanical ingredients in home care, and understanding why we use it says a lot about how Phenora builds products.

What citral actually is

Lemongrass (Cymbopogon, a tall tropical grass that grows abundantly across India) owes most of its character to a single aromatic compound: citral. When lemongrass oil is extracted, citral typically makes up the majority of it, and it’s citral you’re smelling when you think “lemongrass” — that sharp, citrusy brightness that’s related to, but distinct from, actual lemon.

Citral belongs to a family of plant compounds called terpenes and terpenoids — molecules plants produce for their own purposes, from attracting pollinators to defending against microbes. That last part matters. Many aromatic compounds exist in plants precisely because they make life difficult for bacteria and fungi, which is why so many traditional cleaning practices around the world reached for aromatic plants long before anyone could explain the chemistry.

Fragrance versus function

Here’s the honest version of how most cleaning products handle fragrance: the cleaning is done by a system of surfactants (the molecules that lift and suspend dirt so water can carry it away), and a synthetic perfume is added at the end so the product smells like it worked. The scent and the cleaning are two separate decisions, made by two separate teams.

We think about it differently. When a botanical ingredient can contribute on both fronts — sensory experience and function — it earns a bigger place in the formulation than a perfume ever would. Lemongrass oil is exactly that kind of ingredient. It gives the product its signature scent, and it brings citral’s own properties along with it.

Botanical shouldn’t mean taking our word for it — it should mean we can show you.

What the research actually says

This is where a lot of “natural” brands get ahead of themselves, so let’s be precise. Citral and lemongrass oil have been studied extensively in laboratory settings, and the published literature consistently reports antimicrobial activity against a range of common bacteria and fungi under lab conditions. That’s a genuinely meaningful finding — it’s part of why lemongrass oil appears in cleaning formulations worldwide, not just ours.

What it doesn’t mean is that a mopped floor becomes a sterile one, or that any botanical product should be marketed as a disinfectant unless it’s been tested and registered as one. Lab results and real-world household conditions are different things, and the distance between them is exactly where exaggerated claims live. We’d rather tell you what the science supports and stop there.

From the lab: Citral — the compound that gives lemongrass its characteristic scent — has demonstrated antimicrobial activity against common bacteria and fungi in numerous published laboratory studies. That’s the claim the research supports, and it’s the reason lemongrass earns a functional role in our formulation — not just a fragrant one.

How we use it at Phenora

In our Botanical Floor Cleaner, lemongrass oil works as part of a system. The surfactant base does the heavy lifting on everyday dirt and grime — that’s non-negotiable, because a cleaner that smells wonderful and cleans poorly is exactly the trade-off Phenora was created to reject. The lemongrass contributes its aroma, its character, and citral’s supporting properties, at a concentration chosen for balance: present enough to matter, restrained enough that your home smells fresh rather than perfumed.

That balance took iteration. Too little lemongrass and the product loses its identity; too much and the scent turns sharp and the formulation’s stability gets harder to manage. The version in the bottle is the one that passed our internal testing on all three counts — cleaning performance, scent experience, and batch-to-batch stability.

Sourcing and consistency

One more thing worth knowing: natural lemongrass oil varies. Citral content shifts with the harvest, the region, the season. That variability is charming in a garden and a real problem in a product that has to smell and perform identically every time you buy it. Managing it is one of the more technically demanding parts of working with botanicals — it’s handled through controlled sourcing and batch-level quality checks, so the bottle you buy in March behaves like the one you bought in November.

India happens to be one of the world’s most important sources of lemongrass and its research — institutions like CSIR-CIMAP have studied aromatic plants like it for decades. Building a botanical brand here means that heritage isn’t a marketing line; it’s the supply chain and the science we get to draw on.

So the next time you mop and that green brightness lifts off the floor, you’ll know: it’s not a perfume telling you the work is done. It’s an ingredient that was doing some of the work all along.