4,4'-OXYBIS(PHENYL ISOCYANATE)
- CAS NO.：4128-73-8
- Empirical Formula: C14H8N2O3
- Molecular Weight: 252.22
- MDL number: MFCD00216648
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-12-31 14:38:37
What is 4,4'-OXYBIS(PHENYL ISOCYANATE)?
Chemical properties
WHITE CRYSTALLINE SOLID
The Uses of 4,4'-OXYBIS(PHENYL ISOCYANATE)
4,4'-Bis(isocyanatophenyl)oxide is a reagent used in the synthesis of lipid-conjugated Smac analogs with antitumor activity against human breast cancer cell lines.Environmental toxin on US EPA Toxic Release Inventory list (TRI) list.
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.
Properties of 4,4'-OXYBIS(PHENYL ISOCYANATE)
| Melting point: | 64-68 °C(lit.) |
| Boiling point: | 196 °C5 mm Hg(lit.) |
| Density | 1.2700 (rough estimate) |
| refractive index | 1.5910 (estimate) |
| solubility | Acetonitrile (Soluble) |
| form | Solid |
| color | White to Off-White |
| Stability: | Moisture Sensitive |
| CAS DataBase Reference | 4128-73-8 |
| EPA Substance Registry System | 4,4'-Diisocyanatodiphenyl ether (4128-73-8) |
Safety information for 4,4'-OXYBIS(PHENYL ISOCYANATE)
| Signal word | Danger |
| Pictogram(s) |
 Skull and Crossbones Acute Toxicity GHS06  Health Hazard GHS08 |
| GHS Hazard Statements |
H301:Acute toxicity,oral H312:Acute toxicity,dermal H315:Skin corrosion/irritation H317:Sensitisation, Skin H319:Serious eye damage/eye irritation H330:Acute toxicity,inhalation H334:Sensitisation, respiratory H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P284:Wear respiratory protection. P310:Immediately call a POISON CENTER or doctor/physician. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 4,4'-OXYBIS(PHENYL ISOCYANATE)
New Products
DL-beta-(3-Bromophenyl)alanine 1-Aminocyclopentane carbonitrile (RS)-beta-Amino-beta-(4-bromophenyl)propionic acid N,N CARBONYL DIIMIDAZOLE 2-Amino-5-bromo-4-(trifluoromethyl)pyridine（RM for Indian lab) Benzyl (3R,4S)-3-(2-bromoacetyl)-4-ethylpyrrolidine-1-carboxylate Amlodipine EP Impurity-C Budesonide Impurity-K/Budesonide 21-Acetate (Epimers) Gabapentine Impurity 72 Bicalutamide Impurity-B Betahistine EP Impurity C Carbamazepine EP Impurity G 2,2'-(5-methyl-1,3-phenylene)-di(2-Methylpropionitrile) 4-Fluorothiophenol 1-methyl amino-2,4-dinitro benzene 5-Methyl-1,3-benzenediacetonitrile (R)-BoroLeu-(+)-Pinanediol-CF3COOH 4-(5-amino-1-methyl-1h-benzoimidazol-2-yl)-butyric acid isopropyl ester. 3-Hydroxypropionitrile 4-Bromo Benzylcyanide valeronitrile 3,4 Dimethoxy Benzylcyanide 3-chlorobenzyl cyanide 2-Chloro BenzylcyanideRelated products of tetrahydrofuran
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