4128-73-8

Basic information

• Product Name: 4,4'-OXYBIS(PHENYL ISOCYANATE)
• Synonyms: OXYBIS(4-PHENYL ISOCYANATE);1,1’-oxybis[4-isocyanato-benzen;4,4'-OXYBIS(PHENYL ISOCYANATE);4,4'-Diisocyanato[1,1'-oxybisbenzene];4,4'-Oxybis(isocyanatobenzene);Oxybis(1,4-phenylene)bisisocyanate;Oxybis(1,4-phenylene)diisocyanate;Oxybis(4-phenyl isocyanate),99%
• CAS NO: 4128-73-8
• Molecular Formula: C₁₄H₈N₂O₃
• Molecular Weight: 252.22
• Product Categories: Isocyanates;Nitrogen Compounds;Organic Building Blocks
• Mol File: 4128-73-8.mol
• Article Data: 2

Chemical Properties

• Melting Point: 64-68 °C(lit.)
• Boiling Point: 196 °C5 mm Hg(lit.)
• Appearance: /
• Density: 1.2700 (rough estimate)
• Refractive Index: 1.5910 (estimate)
• CAS DataBase Reference: 4,4'-OXYBIS(PHENYL ISOCYANATE)(CAS DataBase Reference)
• NIST Chemistry Reference: 4,4'-OXYBIS(PHENYL ISOCYANATE)(4128-73-8)
• EPA Substance Registry System: 4,4'-OXYBIS(PHENYL ISOCYANATE)(4128-73-8)

Safety Data

• Hazard Codes: Xn,T+
• Statements: 20/21/22-36/37/38-42/43-26-25-21
• Safety Statements: 23-26-36/37/39-45-36/37-28-22
• RIDADR: UN 2206 6.1/PG 3
• WGK Germany: 3
• Hazardous Substances Data: 4128-73-8(Hazardous Substances Data)

Usage

Chemical Properties

WHITE CRYSTALLINE SOLID

Reactivity Profile

Isocyanates and thioisocyanates are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Polyurethanes are formed by the condensation reaction of diisocyanates with, for example, ethyl glycol.

Upstream product

• 75-44-5 phosgene 
• 101-80-4 4,4'-oxydiphenylene diamine 

Downstream Products

• 124887-71-4 4,4'-bis-(1-carboxymethyl-3-hydantoyl)diphenyl oxide hydrate 
• 1005769-91-4 (((CH₃)2CHO)3VNC₆H₄)2O 
• 1328894-76-3 3,3'-(oxybis(4,1-phenylene))bis(1-(4-fluorophenyl)-4-imino-5-thioxoimidazolidin-2-one) 
• 1198619-85-0 3,3'-(4,4'-oxybis(4,1-phenylene))bis(1-(3,4-dichlorophenyl)-4-imino-5-thioxoimidazolidin-2-one) 
• 81779-02-4 4,4'-(bis-1,2,4-triazolidine-3,5-dione-4-yl)-diphenyl ether 
• 226385-79-1 4,4'-Oxybis(1-hydroxy-1-(1-ethylpropyl)-3-phenylurea) 
• 226385-71-3 4,4'-Oxybis(1-hydroxy-1-methyl-3-phenylurea) 
• 124887-72-5 4,4'-Bis(1-carboxymethyl-3-hydantoinyl)diphenyl oxide dihydrate 
• 19044-26-9 4,4'-Bis--diphenylether 

Relevant articles and documents

Hydrolytically degradable polyester/silicon co-crosslinked matrices

Polyester/silicon co-crosslinked polymer substrates at least partially degradable by hydrolysis, well adopted as matrices for the controlled release of a wide variety of active agents therefrom, are prepared by controlledly co-crosslinking (a) at least one diorganopolysiloxane having at least two hydroxyl groups per molecule and (b) an oligomeric polylactic and/or polyglycolic polyester α,ω-diol, with an effective co-crosslinking amount of (c) an organic polyisocyanate.