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4,4'-Diphenylmethane diisocyanate Structure

4,4'-Diphenylmethane diisocyanate

Chemical Properties

Melting point 38-44 °C
Boiling point 392 °C
Density  1.19
vapor pressure  0.066 hPa (20 °C)
refractive index  1.5906 (estimate)
Flash point 196 °C
storage temp.  -20°C
solubility  2g/l (decomposition)
Specific Gravity 1.180
color  White to Almost white
explosive limit 0.4%(V)
Water Solubility  decomposes
FreezingPoint  37℃
Sensitive  Moisture Sensitive/Lachrymatory
BRN  797662
Exposure limits TLV-TWA 0.051 mg/m3 (0.005 ppm) (ACGIH and NIOSH); ceiling (air) 0.204 mg/m3 (0.02 ppm)/10 min (NIOSH and OSHA); IDLH 102 mg/m3 (10 ppm).
Dielectric constant 10.0(Ambient)
Stability Stable. Combustible. Incompatible with strong oxidizing agents. Reacts violently with alcohols.
CAS DataBase Reference 101-68-8(CAS DataBase Reference)
IARC 3 (Vol. 19, Sup 7, 71) 1999
NIST Chemistry Reference Benzene, 1,1'-methylenebis[4-isocyanato-(101-68-8)
EPA Substance Registry System 4,4'-Methylenedi(phenyl isocyanate) (101-68-8)

Safety Information

Hazard Codes  Xn,T,C
Risk Statements  42/43-36/37/38-20-48/20-40
Safety Statements  45-36/37-23
RIDADR  2206
WGK Germany  1
RTECS  NQ9350000
Autoignition Temperature >600 °C
Hazard Note  Toxic/Corrosive/Lachrymatory/Moisture Sensitive
TSCA  Yes
HazardClass  6.1
PackingGroup  II
HS Code  29291090
Hazardous Substances Data 101-68-8(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rabbit > 9000 mg/kg
IDLA 75 mg/m3

MSDS

Usage And Synthesis

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