Food use
Food-use source coverage is present in the current record.
The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.
- beauty
- cleaning
- industrial
4,4-Dimethyl oxazolidine
CAS 51200-87-4 · 20/100 · High conf.
Also registered as 1 other CAS number
1200630-61-0
Concern score
20/100Minor concern based on regulatory listings.
High confidence
4,4-Dimethyl oxazolidine in plain language
On cosmetic ingredient lists it appears as “Dimethyl oxazolidine”.
Also known as Dimethyl oxazolidine · 4,4-DIMETHYLOXAZOLIDINE · 4,4-Dimethyl-1,3-oxazolidine · 4,4-DIMETHYL-1-OXA-3-AZACYCLOPENTANE · Caswell No. 374AB · Dimethyloxazolidine
Show all 17 names
Nuosept 101 · Nuosept 166 · Nuospet 101 · Oxaban-a · Oxadine A · Oxazolidine A · Oxazolidine, 4,4-dimethyl- · Truptan ox · Truptan OX-I · UNII-96J42P99ZA · Zoldine za
Used in cosmetics as a preservative. Dimethyl Oxazolidine is the heterocyclic compound.
- Preservative
- Antimicrobial
- Minor concern: no hazard classifications on record. It is listed for cosmetic use in the EU.
What the listings say
Permitted, with conditions — 4,4-Dimethyl oxazolidine appears on published "allowed" regulatory lists rather than on a restriction list.
4,4-Dimethyl-1,3-oxazolidine is listed in Annex V of the EU Cosmetics Regulation (EC) 1223/2009 (preservatives allowed in cosmetic products).
The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.
Regulation
No restrictions found. 4,4-Dimethyl oxazolidine appears in these published regulatory listings.
- EU Annex V — permitted preservative
- EU permitted preservative
- Found in consumer products
- Beauty
- Cleaning
- Industrial
EUECallowed_listedAnnex V of EU Cosmetics Regulation (EC) 1223/2009: preservatives allowed in cosmetic products. Maximum concentration: 0.1% Other conditions: pH > 6
- Annex V of EU Cosmetics Regulation (EC) 1223/2009: preservatives allowed in cosmetic products. Maximum concentration: 0.1% Other conditions: pH > 6Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 22 composition records across product categories including Cleaning and safety, Personal care, Industrial products. EPA CPDat classifies this chemical for functional uses including Preservative, Biocide.
- EPA CPDat observed this chemical in 22 composition records across product categories including Cleaning and safety, Personal care, Industrial products. EPA CPDat classifies this chemical for functional uses including Preservative, Biocide.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Expert safety opinions
No expert opinion on file for 4,4-Dimethyl oxazolidine. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.
SCCS
EU Scientific Committee on Consumer Safety
No SCCS opinion on file.
CIR
Cosmetic Ingredient Review (US expert panel)
No CIR safety assessment on file.
Evidence & sources
No graded research studies for 4,4-Dimethyl oxazolidine yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
CosIng
regulatory · updated 2026-09-23
- Open →
EU CosIng Cosmetics Regulation Annexes
regulatory · updated 2010-10-16
- Open →
EPA Chemical and Products Database
exposure · updated November 2014
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- Open →
FDA GSRS UNII
registry · updated 2026-02-26
- Open →
openFDA Substance
registry · updated 2026-05-24
- Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Good fit
Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.
Where it has been recorded
How often EPA CPDat has listed 4,4-Dimethyl oxazolidine in a product composition. These are source records, not Greenveil catalog products.
Source records
22
Named organisations
6
Cleaning and safetyPersonal careIndustrial productsVehicleCleaning products and household care
Typical roles
PreservativeAntimicrobial
Found in these products
Cosmetic and personal-care products that list 4,4-Dimethyl oxazolidine are shown first. Their ingredient lists include 4,4-Dimethyl oxazolidine; each product's own rating depends on its whole formula, so it is shown on the product page, not here.
