Preservatives & Biocides
REACH
4,4-dimethyloxazolidine
CAS Number
51200-87-4
EC Number
257-048-2
What is 4,4-dimethyloxazolidine?
4,4-Dimethyloxazolidine (CAS 51200-87-4) is a cyclic amine biocide and preservative.
Where is 4,4-dimethyloxazolidine used?
- Metalworking and industrial lubricants: controls microbial contamination in water-miscible cutting fluids and coolants, extending fluid service life
- Personal care: preservative booster in rinse-off and leave-on products
- Oilfield and water treatment: prevents biofouling and microbiologically influenced corrosion
- In injection water systems and process pipelines it maintains operational integrity.
- Industrial fluid formulations: corrosion inhibitor where microbial-driven degradation accelerates metal attack
Good to know: It functions by releasing formaldehyde under aqueous conditions, delivering broad-spectrum antimicrobial activity. Cosmetic-grade material is available for personal care use.
Commercial specifications
- Packaging from drums to IBC totes
Other Names (Synonyms)
4,4-Dimethyl-1,3-oxazolidine|Oxazolidine A|Dimethyl oxazolidine|Oxadine A|Oxazolidine, 4,4-dimethyl-|Oxaban A|Zoldine ZA|Nuosept 101
What are the physical properties of 4,4-dimethyloxazolidine?
Boiling Point 124-125 °C @ Press: 750 Torr
Density 0.942 g/mL at 25 °C
Flash Point 120 °F
Appearance Colorless to light yellow Liquid
Refractive Index n 20/D 1.432
Log P 1.11 at 25℃
How is 4,4-dimethyloxazolidine classified and handled safely? Learn More
Danger
GHS02· Flammable GHS05· Corrosive GHS07· Irritant
Hazard Statements
H226 Flammable liquid and vapor
H302 Harmful if swallowed
H312 Harmful in contact with skin
H315 Causes skin irritation
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.
Which trade and regulatory codes apply to 4,4-dimethyloxazolidine?
HS Code 2934999090
WGK (Germany) 2