Propylparaben and Butylparaben
Propylparaben and butylparaben are long-chain parabens that prevent microbial growth in cosmetics. Because their hormone-like effects in laboratory studies are more pronounced than those of short-chain parabens, they are permitted at lower limits in the EU and cannot be used in products for the nappy area. The SCCS considers them safe at the permitted levels; however, they are an understandable thing to avoid for those who prefer to be cautious.
Risk range
1 is the lowest and 10 the highest risk. The range depends on the amount used, whether the product is rinsed off and how it is used. The Temiz İçerik app uses the same ranges.
Close to the lower end in rinse-off products; the upper end applies to leave-on products, products for babies and young children, and use together with several other parabens.
What is propylparaben and what does it do?
Propylparaben and butylparaben are longer-chain esters of para-hydroxybenzoic acid. As the chain gets longer, the substance becomes more oil-soluble and more effective, particularly against moulds and yeasts. For this reason they are usually used together with methylparaben to provide broader protection.
However, the same chain length is also linked to a stronger weak oestrogen-like effect in laboratory studies. This is why regulators take a more cautious approach to these two parabens.
Which products contain it?
- Creams, lotions and sun products
- Make-up products, especially foundation and mascara
- Hair care products and some shampoos
- Some pharmaceutical formulations
Is it harmful? The scientific assessment
The SCCS has assessed the possible effects of propyl- and butylparaben on the hormone system several times and concluded that these two substances are safe for consumers as long as their combined concentration does not exceed 0.14% (expressed as acid). In line with this assessment, the EU lowered the limit and banned these two parabens in leave-on products applied to the nappy area of children under 3. The reasoning is that the skin in this area may be more permeable and that the systems that break down the substance are not yet mature in babies.
In 2014 the EU also banned five parabens outright in cosmetics: isopropylparaben, isobutylparaben, phenylparaben, benzylparaben and pentylparaben. This was not because they were proven harmful, but because not enough data had been submitted to assess their safety. Turkish cosmetics legislation is also aligned with these rules.
The claim that parabens cause cancer has not been proven. The hormone-like effect is a genuine laboratory finding, but its strength is very low compared with the body's own hormones. The moderate risk range in the app reflects this uncertainty and the more vulnerable groups.
Who should be careful?
- Babies and young children: They are already banned in products applied to the nappy area; for other baby products, too, formulas with fewer preservatives can be chosen.
- Pregnant women and those who want to be cautious because of hormone sensitivity: They may consider paraben-free options, especially for leave-on products applied over large areas of the body.
- People with a confirmed paraben allergy: They should check the label for any name ending in “-paraben”.
What to do when you see it on a label
Seeing propylparaben in a rinse-off product is not a serious cause for concern. For leave-on products applied over large areas, those who want to be cautious can choose products made with different preservatives such as methylparaben or phenoxyethanol. If you see one of the five banned parabens on a label, bear in mind that the product may not comply with EU/Turkish legislation.
Frequently asked questions
Why is propylparaben considered riskier than methylparaben?
Because its chain is longer, its hormone-like effect is more pronounced in laboratory studies. That is why it is permitted at a lower limit.
Which parabens are banned?
In the EU, isopropyl-, isobutyl-, phenyl-, benzyl- and pentylparaben have been banned in cosmetics since 2014. Methyl-, ethyl-, propyl- and butylparaben can be used within certain limits.
Can a baby cream contain propylparaben?
Under EU rules, propyl- and butylparaben cannot be used in leave-on products applied to the nappy area of children under 3.
Sources
Updated: 2026-10-11 · How we score
This page is for general information and is not personal medical advice. Warnings on the product label and the advice of a health professional always come first.