Product Description
DESMODUR 44C is a 4,4′-diphenylmethane diisocyanate monomer with a molecular weight of 250 and is a colorless to light yellow solid at room temperature. This product is mainly used in the production of polyurethane products.
Sampling
Prevent the product from coming into contact with water vapor during sampling.
Specification
Item
Indicator
Unit
Test Method
2,4′-MDI content
≤1.8
% of
20110367601-92
Hydrolyzed chloride content
≤50
ppm
2011-0339304-95
Dimer content*
≤0.1
% of
2012-0346901-92
Typical properties
Item
Indicator
Unit
Test method
Purity (molecular weight 250)
≥99.5
% of
2011-0248603-94
NCO content (theoretical value)
33.6
% of NCO content (theoretical value)
–
Phenyl isocyanate content
≤10
ppm
2011-0339304-95
Viscosity (40℃)
0.1
mPa.s
2011-0313703-95
Density (40℃)
1.19
g/cm³
DIN 51757
Specific heat (cp)
Approx. 1.39
kJ/kg.K
Heat of dissolution
Approx. 102
J/g
Packaging
DESMODUR 44C is available in two ways:
– Liquid (tanker truck)
– Solid (in drums, net weight 225 kg)
Storage
Recommended storage temperature (°C)
<5 (solid), 43±2 (liquid)
Shelf life
≤3 months (solid), ≤3 weeks in tank (liquid) if kept in closed, drained condition
![](https://www.newtopchem.com/wp-content/uploads/2023/11/timg-5.jpg)