Desmodur® ultra N 3900

Low-viscosity, aliphatic polyisocyanate resin based on hexamethylene diisocyanate. As the hardener for weather-stable coating systems.

Brand: Desmodur
Available in: Asia Pacific, Europe Middle-East and Africa, Latin America, North America

Typical values

Property	Value	Unit	Test method	Condition
All attributes
Flash point	203	°C	DIN EN 22719	1,013 hPa
NCO content	23 – 24	%	M105 - ISO 11909
Monomer content	0 – 0.1	%	M106 - ISO 10283
Dynamic viscosity	630 – 830	mPa·s	M014 - ISO 3219/A.3	23 °C
Color	≤ 40		M017 - EN 1557
Density	1.15	g/cm³	DIN 51757	20 °C

Hazard Classes / Hazard Categories

According to Regulation (EC) No 1272/2008 on classification, labelling

and packaging of substances and mixtures (the 'CLP Regulation')

Acute toxicity, Inhalative, Category 4(H332)

Sensitization of the skin, Category 1(H317)

Specific target organ toxicity (single exposure), Category 3(H335)

Hazard Classes / Hazard Categories

According to Regulation (EC) No 1272/2008 on classification, labelling

and packaging of substances and mixtures (the 'CLP Regulation’) as

amended by GB-CLP regulation.

Acute toxicity, Inhalative, Category 4(H332)

Sensitization of the skin, Category 1(H317)

Specific target organ toxicity (single exposure), Category 3(H335)