Is Dimethyl oxazolidine Banned? EU vs US Status, Risks & Where It Hides
TL;DR: Dimethyl oxazolidine is banned in the EU but allowed in the US (formaldehyde releasers).
INCI name Dimethyl Oxazolidine. CAS 51200-87-4.
Is Dimethyl oxazolidine banned in the EU?
| EU status | Banned |
|---|---|
| US status | Allowed |
| Risk level | high |
| Where it shows up | preservative blends, cleansers |
| CAS number | 51200-87-4 |
What is Dimethyl oxazolidine?
Dimethyl oxazolidine is a preservative that slowly releases formaldehyde to kill bacteria in water-based personal-care products.
Why is Dimethyl oxazolidine used in personal-care products?
It extends shelf life cheaply by releasing low levels of formaldehyde over time.
Is Dimethyl oxazolidine dangerous? Documented risks
Formaldehyde is a known human carcinogen and a common skin sensitizer. The EU restricts formaldehyde-releasing preservatives and requires warning labels; Washington State is phasing them out, while they remain unrestricted federally in the US.
Products that may contain Dimethyl oxazolidine
- preservative blends
- cleansers
How to avoid Dimethyl oxazolidine: safer alternatives
Choose 'formaldehyde-free' products and EU-compliant brands; look for preservatives like sodium benzoate or potassium sorbate. BannedPantry flags formaldehyde releasers on the INCI list.
Frequently asked questions about Dimethyl oxazolidine
Is Dimethyl oxazolidine banned in the EU?
Dimethyl oxazolidine is restricted under the EU Cosmetics Regulation (1223/2009), but it is allowed in US personal-care products.
Is Dimethyl oxazolidine in US cosmetics?
Yes — Dimethyl oxazolidine 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 Dimethyl oxazolidine?
Read the INCI ingredient list on the back of the package. Scan the barcode with BannedPantry to flag Dimethyl oxazolidine automatically.
Are there safer alternatives to Dimethyl oxazolidine?
Yes. Look for EU-compliant or 'free-from' formulations; BannedPantry suggests safer swaps when it detects Dimethyl oxazolidine.
Scan any product's barcode and instantly see if it contains Dimethyl oxazolidine or other ingredients banned overseas.
Scan a product free →Related formaldehyde releasers
Avoiding banned beauty ingredients? Check your food, too.
Sources
- Formaldehyde releasers in common personal-care products — Silent Spring Institute
- Washington Toxic-Free Cosmetics Act implementation — Toxic-Free Future
- EU Cosmetics Regulation Annex II (prohibited substances) — EU Cosmetics Regulation 1223/2009
Our scores are never influenced by brands. Last updated 6/11/2026.