HDI biuret


1,3,5-Tris(6-hydroxyhexyl)biuret triisocyanate CAS # 4035-89-6, 28182-81-2

Molecular weight 478.6
Isocyanate, %
Equivalent weight 159
Toxicity/Safety See MSDS of manufacturer

Solids, wt.% 99.3 minimum
NCO content, % 21.8-22.2
Color, APHA 200 maximum
Viscosity @ 25C, mPas 5,000-10,000
Free HDI monomer, % (based on solids) 0.7 maximum


Appearance Clear, slightly yellow liquid
Equivalent wt., avg.(as supplied) 191
Specific gravity @ 25C 1.14
Weight per gallon, lb. @ 25C 9.5
Flash point (Setaflash) 375F (191C)

Data from Bayer 

Regulatory Inventory
CAS REGISTRY NUMBER # 4035-89-6, 28182-81-2 NAME : Imidodicarbonic diamide, N,N',2-tris(6-isocyanatohexyl)
DSL Canada Yes
EINECS Europe NLP No.500-060-2 EINECS No. 223-718-8 Yes
ENCS Japan   Yes
ECL Korea ECL Serial No. KE-34829 No. KE-10911 Yes
AICS Australia Yes
The fact that a compound is not listed under a specific CAS # in a countries inventory does not mean this compound cannot be used, it can be an exempt compound or polymer which does not require listing, or it can be listed in a different category. Ask your supplier.
Other names:
Imidodicarbonic diamide, N,N',2-tris(6-isocyanatohexyl)-
N,N',2-Tris(6-isocyanatohexyl)imidodicarbonic diamide 
1,3,5-Tris(6-hydroxyhexyl)biuret triisocyanate
HDI biuret
Hexamethylene diisocyanate biuret
HMDI biuret
Isocyanic acid, triester with 1,3,5-tris(6-hydroxyhexyl)biuret
N,N',2-Tris(6-isocyanatohexyl)imidodicarbonic diamide
Commercial Products or generic terms used for products. For manufacturer see Isocyanate MFCT.
Desmodur N-100

Last edited on:

July 06, 2006

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