Fragrance is the single ingredient most likely to decide whether a consumer repurchases a product, and it is also the only ingredient in a formula that arrives as a finished, proprietary creation developed by someone other than the formulator. That makes it a separate project inside the product development, with its own brief, its own development cycle and its own compliance documentation.
It is also the ingredient with the most market-specific regulation attached to it. A fragrance compound is supplied with a certificate that states the maximum concentration at which it can be used in each product category, and using more than the certificate allows is a compliance failure regardless of how good the scent is.
This guide explains how a fragrance is briefed and developed, what the IFRA Standards actually control, how allergen labelling works, how fragrance interacts with the base, and how to manage the commercial trade-offs honestly.
Why fragrance is a separate project
A fragrance house works with a library of several thousand materials, a brief and a target cost, and produces a compound that the formulator then incorporates into a base. The base and the fragrance are developed in parallel rather than sequentially, because a scent that works in isolation can behave differently once it is dissolved in an emulsion at three percent.
Three consequences follow for a brand. First, the fragrance timeline runs alongside the formula timeline, and a change to either can affect the other. Second, the fragrance carries its own cost per kilogram, which affects the product's total cost more than its percentage in the formula suggests. Third, the fragrance carries its own regulatory documentation, which the brand needs regardless of where it was created.
Who creates the fragrance
There are three routes, and they differ in cost, exclusivity and speed.
The first is a stock fragrance from a fragrance house's catalogue. It is the fastest and cheapest route, it is already documented, and it is available to any other brand that wants it. For a brand whose differentiation sits elsewhere, this is often the sensible choice.
The second is a modification of a stock fragrance, in which the perfumer adjusts an existing accord towards the brief. It costs more than a catalogue selection, it produces a scent that is less widely used, and it maintains much of the documentation of the original.
The third is a bespoke creation, developed specifically for the brand. It is the most expensive, it takes the longest, and it can be protected by an exclusivity agreement. For a brand whose proposition depends on a signature scent, this is the route that makes the claim meaningful.
Two commercial terms are worth settling before development starts. The first is exclusivity: whether the fragrance can be sold to another brand, and for how long. The second is ownership: whether the brand owns the formula of the fragrance itself or only the right to use it, which matters if the brand later changes manufacturer.
How to brief a scent
The quality of the fragrance outcome depends heavily on the quality of the brief, and the common failure is describing a scent with adjectives that mean different things to different people.
A usable brief describes the intended consumer and the usage occasion, the market and the cultural reference, the sensory direction in terms of families and notes rather than single words, the intensity and the longevity expectation, the price ceiling, and the reference products the brand admires. Where possible it also states what the brand does not want, which is often more informative than what it does.
Two practical points improve the outcome. Smelling a set of initial directions on blotters is not the same as smelling them in the base, so the shortlist stage should be repeated once the candidate bases are ready. And the scent should be evaluated on skin rather than only on paper, because the skin's own chemistry changes the way a fragrance develops.
What the IFRA Standards control
The IFRA Standards are a set of use restrictions published by the International Fragrance Association, implemented through its code of practice, that specify limits for individual fragrance materials across defined product categories. They exist because some fragrance materials carry a sensitisation or a toxicity risk that depends on concentration and on how the product is used.
A fragrance compound is supplied with a certificate of conformity stating that it complies with the current standards for the categories in which it is intended to be used, and giving the maximum recommended concentration for each. The brand's obligation is to use the compound within those limits and to keep the certificate in its technical file.
The category structure is the part that most often surprises brands. The categories distinguish products by exposure: a product applied to the lips carries a much tighter restriction than a product applied to the body, because part of it is ingested, and a leave-on product is treated differently from a rinse-off one. This is why the same fragrance can be used at a higher concentration in a body wash than in a lip balm, and why the target product categories must be stated on the fragrance brief rather than assumed.
Allergen labelling
Independently of the IFRA limits, a defined list of fragrance substances has to be declared on the label when it is present above a threshold, and the thresholds differ between leave-on and rinse-off products. The list is set out in the European cosmetic regulation and has been extended by amendment, with transition periods for products already on the market. Other markets maintain their own requirements, and several align closely with the European approach.
Three practical consequences follow. A fragrance with a high content of declarable substances produces a longer and less attractive ingredient list, which is a marketing consideration as well as a compliance one. A brand selling the same base in several markets may need different label artwork. And the allergen declaration has to be based on the fragrance supplier's actual composition data rather than on an estimate, which is why the supplier's documentation is part of the label approval process.
Fragrance in different product types
The fragrance load and the behaviour of a fragrance differ substantially by product type, and the brief should reflect the format.
| Product type | Typical load and role | Main technical issue | Regulatory note |
|---|---|---|---|
| Lip products | Low load, flavour-led rather than fragrance-led | Taste and the effect of the flavour on the base | The strictest category, because of ingestion exposure |
| Facial skincare | Low load, often used for masking rather than for scent | Discolouration and interaction with actives | Allergen declaration threshold applies at the leave-on level |
| Body lotion and body care | Higher load; the scent is often the purchase driver | Absorption into the pack material reducing intensity over time | Allergen declaration at the leave-on threshold |
| Cleansers, shampoos, body wash | High load; scent must survive dilution and rinsing | Loss of the top notes during processing and filling | Rinse-off thresholds are higher, allowing a larger load |
| Fine fragrance | The product is the fragrance | Alcohol and solvent interaction, and stability across the whole composition | Full ingredient and allergen declaration on a concentrated formula |
The practical implication is that a fragrance cannot simply be transferred between formats at a different percentage. Its performance changes with the base, and its permitted concentration changes with the category.
How fragrance interacts with the base
Fragrance is chemically active inside a formula, and several interactions are common enough to be planned for.
Discolouration is the most frequent. Many fragrance materials oxidise or react with other ingredients and turn a white cream yellow or a clear gel brown, sometimes within weeks. The reaction is often accelerated by light and by traces of metal ions, which is why a fragrance should be evaluated in the finished base rather than in water. Where a brand insists on a fragrance that discolours, an opaque pack can protect the claim, but the reaction itself continues.
Viscosity and emulsion stability are affected because fragrance materials are solvents and can disturb the emulsifier film or the polymer network, particularly at higher loads. This is one of the reasons the fragrance is normally added during the cooling stage, where the structure has begun to form and the temperature is low enough not to volatilise the more delicate components. Adding fragrance while the batch is hot can lose part of the composition and change the scent.
Preservation is a third interaction. Some fragrance components have antimicrobial activity that assists the preservation system, and some can interfere with it. The challenge test should be run on the formula containing the final fragrance, not on the unfragranced base.
The commercial trade-offs
Fragrance load and fragrance quality both cost money, and the two are not the same lever.
Increasing the load raises the cost proportionally and increases the compliance risk, since more of the compound means more of every restricted material. It also increases the risk of discolouration and of stability problems. Improving the quality of the fragrance, meaning the choice of materials within it, raises the cost per kilogram without changing the percentage and without increasing the regulatory load.
The commercially effective approach is usually to select a fragrance that performs well at a moderate load rather than to use a cheap fragrance at a high load. A well-constructed compound that has good substantivity on skin can deliver a stronger consumer impression at a lower percentage than a poorly constructed one at twice the level, and it carries less regulatory burden as a result.
Market preferences
Fragrance preferences are strongly regional, and a brand selling into several markets should expect to develop more than one direction.
Consumers in many Asian markets favour lighter, cleaner, fresher profiles, and unscented products have a substantial following in skincare. Consumers in the Gulf and parts of Latin America often expect richer, more pronounced and longer-lasting fragrances at a given price point. European consumers split sharply by tier, with mass market favouring a strong immediate scent and premium skincare frequently going unscented. North American consumers respond to both gourmand and clean profiles depending on the category.
The efficient structure for a multi-market range is one fragranced base with market-specific fragrance variants, or a single lightly fragranced base with an unscented variant for markets that prefer it. Both approaches keep the stability and safety work shared while allowing the scent to be localised.
What should a fragrance brief contain?
State the product type and its intended use category, the target consumer and occasion, the sensory direction with reference products, the intended intensity and longevity, the target markets, the maximum load the formula can accept, the cost ceiling per kilogram of fragrance, the brand's position on allergen content, and whether exclusivity is required.
Two items are worth stating explicitly. Name the intended product categories on the fragrance brief itself, because the same compound carries different limits in each and the perfumer needs to work within them. And state early whether the brand wants a bespoke creation or would accept a catalogue selection, because the difference in cost and timeline is large and the brief is written differently for each.
Frequently asked questions about fragrance
Can we use the same fragrance across a whole range?
Often yes, but the permitted load differs by product category, and a fragrance that works in a body wash may be restricted in a lip product or a facial product.
What is a certificate of conformity?
A document from the fragrance supplier stating that the compound complies with the current IFRA Standards for stated categories, and giving the maximum concentration for each. It belongs in the brand's technical file.
Why did our white cream turn yellow?
Almost always a fragrance or an active reacting or oxidising in the base, often accelerated by light or by trace metals. The fix is either a different fragrance or an opaque pack, and it is diagnosed by testing the fragrance in the finished base.
Do we need our own perfumer?
No. A fragrance house can develop from a brief without the brand's involvement beyond approval, though a brand with a strong sensory ambition usually benefits from participating in the evaluation stages.
Can you provide the allergen declaration?
Yes. Allergen content is provided from the fragrance supplier's composition data in the form required for labelling in each target market.
Next step: brief the scent and the category
If you are developing a fragranced product or a fragrance range, send us the product type, the sensory direction, your markets and the load the formula can accept, and we will propose fragrance options, a development route and a costed quote. Write to capsulebiotech@163.com, message the right team on WhatsApp: Capsule Series (capsules only) +86 158-7655-5319, Cosmetics Series (serum, hair care, body care, fragrance) +86 158-7655-5319, or use the inquiry form and we will reply within one working day.
Related programmes and guides: fragrance body wash, perfume and fragrance OEM, and our guides to custom fragrance development services and fragrance formulation and global compliance.