Is Diisobutyl phthalate Banned? EU vs US Status, Risks & Where It Hides
TL;DR: Diisobutyl phthalate is banned in the EU but allowed in the US (phthalates).
INCI name Diisobutyl Phthalate. CAS 84-69-5.
Other names: DIBP
Is Diisobutyl phthalate banned in the EU?
| EU status | Banned |
|---|---|
| US status | Allowed |
| Risk level | high |
| Where it shows up | nail polish, perfume, hairspray, lotion |
| CAS number | 84-69-5 |
What is Diisobutyl phthalate?
Diisobutyl phthalate is a phthalate plasticizer historically used in fragrances, nail polish and hair products.
Why is Diisobutyl phthalate used in personal-care products?
Phthalates make plastics flexible, help fragrance last longer and reduce nail-polish chipping.
Is Diisobutyl phthalate dangerous? Documented risks
Diisobutyl phthalate is a reproductive and developmental toxicant and endocrine disruptor. The EU bans CMR phthalates in cosmetics; the US has no federal cosmetic ban.
Products that may contain Diisobutyl phthalate
- nail polish
- perfume
- hairspray
- lotion
How to avoid Diisobutyl phthalate: safer alternatives
Choose phthalate-free and 'fragrance-free' products. BannedPantry flags phthalates and undisclosed 'fragrance' on the label.
Frequently asked questions about Diisobutyl phthalate
Is Diisobutyl phthalate banned in the EU?
Diisobutyl phthalate is banned under the EU Cosmetics Regulation (1223/2009), but it is allowed in US personal-care products.
Is Diisobutyl phthalate in US cosmetics?
Yes — Diisobutyl phthalate can still appear in US-sold cosmetics and personal-care products because US rules are far less restrictive than the EU's.
What products contain Diisobutyl phthalate?
Read the INCI ingredient list on the back of the package. Scan the barcode with BannedPantry to flag Diisobutyl phthalate automatically.
Are there safer alternatives to Diisobutyl phthalate?
Yes. Look for EU-compliant or 'free-from' formulations; BannedPantry suggests safer swaps when it detects Diisobutyl phthalate.
Scan any product's barcode and instantly see if it contains Diisobutyl phthalate or other ingredients banned overseas.
Scan a product free →Related phthalates
Avoiding banned beauty ingredients? Check your food, too.
Sources
- EU Cosmetics Regulation Annex II (prohibited substances) — EU Cosmetics Regulation 1223/2009
- EU endocrine disruptor list I — EU ED Lists
- Chemicals in cosmetics — CHEM Trust
Our scores are never influenced by brands. Last updated 6/11/2026.