Ingredient
Isophorone Diamine
Isophorone Diamine is flagged for pregnancy, breastfeeding, trying to conceive, postpartum, PCOS and general use. The concern behind the strongest flag is irritant and absorbed into the body.
- IPDA
- 3-Aminomethyl-3,5,5-trimethylcyclohexylamine
Verdict by profile
Truva checks every ingredient against six profiles. Jump to any of them for the full assessment.
- Strongest verdict
- Not Recommended
- Its verdict for pregnancy, the profile this one is worst in
- Profiles flagged
- 6 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 4 of 5
- Higher means more likely to sting or redden
Isophorone Diamine and pregnancy
Not Recommended
- Irritant
- Absorbed into the body
Isophorone diamine is a potent chemical amine used primarily in industrial applications and occasionally in hair dye formulations. It functions as a curing agent and intermediate in polymer synthesis, with limited appropriate use in cosmetics. While specific teratogenicity data in humans is lacking, ECHA classifies IPDA as harmful if swallowed and a severe skin and eye irritant. The ingredient's ability to penetrate skin and cause systemic effects is concerning during pregnancy. Animal studies on related diamines have shown developmental toxicity at high doses. The severe skin sensitization potential is particularly problematic during pregnancy when immune responses may be altered. The EU restricts IPDA use in cosmetics due to safety concerns, and it appears on the prohibited substances list. Most dermatologists and obstetricians would recommend avoiding products containing this ingredient during pregnancy due to its irritant properties and potential for systemic absorption, even though direct pregnancy studies are limited.
Isophorone Diamine and breastfeeding
Not Recommended
- Irritant
- Absorbed into the body
Isophorone diamine is a harsh industrial chemical that can cause severe skin irritation and allergic reactions. While data on transfer to breast milk is not available, the ingredient's potential for systemic absorption after dermal exposure is a concern. The severe irritant and sensitizing properties of IPDA make it inappropriate for use during breastfeeding. If absorbed systemically through damaged skin barriers (which can occur with irritation), there is theoretical risk of transfer to breast milk. Additionally, direct contact with infant skin should be avoided. Given ECHA's classification of this ingredient as a skin sensitizer and severe irritant, dermatologists would generally recommend avoiding it while breastfeeding. The risk-benefit ratio does not favor its use when safer alternatives exist.
Isophorone Diamine and postpartum
Caution Advised
- Irritant
- Common allergen
Isophorone diamine is a strong irritant and sensitizer that can cause allergic contact dermatitis. Postpartum skin may be more sensitive due to hormonal changes, potentially increasing reaction risk. While systemic concerns are lower when not breastfeeding, the severe irritant properties remain problematic. Women with postpartum skin sensitivity, eczema, or compromised skin barriers should particularly avoid this ingredient.
Isophorone Diamine and trying to conceive
Not Recommended
- Absorbed into the body
Isophorone diamine should be avoided when trying to conceive due to limited safety data and its classification as a hazardous substance by ECHA. While direct reproductive toxicity data in humans is lacking, related diamines have shown developmental effects in animal studies. The precautionary principle suggests avoiding harsh chemical irritants and sensitizers during the preconception period. Women should discontinue use of products containing IPDA at least several weeks before attempting conception.
Isophorone Diamine and PCOS
Caution Advised
- Irritant
- Common allergen
Isophorone diamine does not have known hormonal effects relevant to PCOS, but its severe irritant and sensitizing properties make it problematic for any skin type, particularly acne-prone skin common in PCOS. Women with PCOS often have inflammatory skin conditions and compromised skin barriers. IPDA's classification as a Category 1 skin sensitizer by ECHA means it can trigger or worsen inflammatory responses and allergic reactions. There are no specific PCOS-related hormonal concerns with this ingredient, but its irritant properties and potential to cause contact dermatitis make it inadvisable for those with sensitive or acne-prone skin.
Isophorone Diamine and general use
Caution Advised
- Irritant
- Common allergen
Isophorone diamine is a potent chemical amine with industrial applications that has very limited appropriate use in consumer cosmetics. It is primarily used in epoxy resin systems and may occasionally appear in professional hair dye formulations. According to ECHA, IPDA is classified as Skin Sensitizer Category 1, meaning it can cause allergic skin reactions even at low concentrations. It may also cause serious eye damage (Category 1) and severe skin irritation. Repeated exposure can lead to sensitization, where allergic reactions become more severe over time. Contact dermatitis from IPDA can be persistent and difficult to treat. The EU restricts IPDA in cosmetics, listing it in Annex II of the Cosmetics Regulation as a prohibited substance for most applications. The SCCS has expressed concerns about its safety profile. Consumers should generally avoid products containing this ingredient unless it appears in strictly regulated, professional-use-only formulations at very low concentrations.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of Isophorone Diamine, each one with its own page here.
Ingredients that raise the same concerns.
Where this came from
Truva summarises published guidance from bodies including ACOG, the FDA, the EU SCCS and the Cosmetic Ingredient Review. It has no access to your medical history and it is not a substitute for your doctor, dermatologist or midwife. These assessments have not been reviewed by a clinician, and nothing here is a diagnosis or a prescription. If you are pregnant, breastfeeding or being treated for PCOS, take the ingredient list to the person looking after you.
Assessment last pulled from the ingredient database on .
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