Ingredient review

Dibromopropamidine Diisethionate

INCI: DIBROMOPROPAMIDINE DIISETHIONATE

An effective preservative but can be irritating for sensitive skin; use is tightly regulated.

beautyskincarepreservative

In plain English

Dibromopropamidine diisethionate is a synthetic preservative added to cosmetics to stop bacteria, yeast, and mold from growing. It helps keep products safe to use over time. Because it can sometimes cause skin irritation, it is used in very small amounts and is regulated by authorities like the European Union.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Main practical flags: irritation is moderate; clogging risk is low.

Source
synthetic
Evidence
moderate
Irritation
moderate
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

Dibromopropamidine Diisethionate can be useful, but watch for some irritation potential.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Dibromopropamidine Diisethionate.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

moderate

Can bother some users, especially with frequent use, damaged skin, or strong companion ingredients.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic antimicrobial compound from the diamidine family, formulated as a diisethionate salt for better water solubility and stability in cosmetic formulas.

How it works

It disrupts the cell membranes of microorganisms, preventing their growth and multiplication, thereby preserving the product from spoilage and contamination.

Pros

Effective preservation

Helps prevent microbial growth in cosmetics, keeping products safe and stable during use.

Low use concentration

Works at very low levels (up to 0.1%), minimizing the amount of preservative in the final product.

Cons and cautions

Irritation potential

Can cause skin irritation or allergic reactions, especially in people with sensitive skin or eczema.

Regulatory restrictions

Banned or restricted in some regions (e.g., EU limits to 0.1% in rinse-off products only), limiting its use in leave-on formulas.

Best for

  • People using products that need strong preservation
  • Those without known sensitivity to antimicrobial preservatives

Use caution if

  • Individuals with sensitive or reactive skin
  • Anyone with a known allergy to diamidine compounds

Usage tips

Check product labels if you have sensitive skin and avoid formulas with this preservative if irritation occurs.
Use products containing this ingredient as directed and discontinue use if redness or stinging develops.

Safety summary

Generally safe at regulated low concentrations, but can cause skin irritation and sensitization in some individuals. Not recommended for leave-on products or for those with sensitive skin.

Research notes

Studies confirm its antimicrobial efficacy against a range of bacteria and fungi. Safety assessments by the SCCS (EU) have established concentration limits to minimize irritation risk.

Common label clues

Typical concentration
Up to 0.1%
Regulatory status
Approved in the EU for rinse-off cosmetics up to 0.1%, but not permitted in leave-on products. In the US, it is not listed as a prohibited or restricted cosmetic ingredient by the FDA, but its use is subject to general safety requirements.
Common uses
Preserved cosmetics, Leave-on products, Rinse-off products
Environmental note
As a synthetic antimicrobial, it may persist in water systems; however, environmental impact data is limited.

Good to know

  • Dibromopropamidine diisethionate is not commonly found in natural or organic cosmetics.
  • It is sometimes used in combination with other preservatives to broaden antimicrobial coverage.

Common questions

What is Dibromopropamidine Diisethionate in beauty products?

Dibromopropamidine diisethionate is a synthetic preservative added to cosmetics to stop bacteria, yeast, and mold from growing. It helps keep products safe to use over time. Because it can sometimes cause skin irritation, it is used in very small amounts and is regulated by authorities like the European Union.

What does Dibromopropamidine Diisethionate do in a beauty product?

It disrupts the cell membranes of microorganisms, preventing their growth and multiplication, thereby preserving the product from spoilage and contamination.

Is Dibromopropamidine Diisethionate safe for most people?

Generally safe at regulated low concentrations, but can cause skin irritation and sensitization in some individuals. Not recommended for leave-on products or for those with sensitive skin.

Who should be careful with Dibromopropamidine Diisethionate?

Individuals with sensitive or reactive skin Anyone with a known allergy to diamidine compounds

Research sources

SCCS Opinion on Dibromopropamidine DiisethionateOpenCosIng Database - European CommissionOpenPubMed - Antimicrobial activity of diamidinesOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.