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Product Current position:Home > Product> Ethyl isocyanate
Ethyl isocyanate
CAS No:   109-90-0


1.IUPAC Name:  Isocyanatoethane 
2.Synonyms:Ethyl isocyanate ; Isocyanic acid ethyl ester ; 1-Isocyanatoethane ; C2H5NCO ; Ethane,isocyanato- ; Isocyanated’ethyle ; Isocyanato-ethan ; Isocyanatoethane  
3.The Molecular formula of  Ethyl isocyanate (109-90-0) : C3H5NO
4.The Molecular Weight of  Ethyl isocyanate (109-90-0) : 71.08 g/mol
5.The Molecular Structure of  Ethyl isocyanate (109-90-0) :  
6.Density: 0.898 g/mL at 25 °C(lit.)
7.Boiling point:  60 °C(lit.)
8.Flash point:  20 °F
9.Solubility in water: Insoluble
10.Refractive index (nD): 1.381(lit.)
11.Appearance:  colorless liquid
12.Storage temp: 2-8°C
13.vapor pressure: 209 mmHg at 25°C


  Ethyl isocyanate (109-90-0) is used to make pharmaceuticals and pesticides.

Toxicity Data With Reference


mmo-sat 50 µg/plate ABCHA6 44,3017,80


ivn-mus LD50:56 mg/kg

    CSLNX*    U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) NX#02910 .

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Poison by intravenous route. Mutation data reported. A flammable liquid. When heated to decomposition it emits toxic fumes of NOx. See alsoCYANATES.
 Hazard Codes  F,T 
F: Highly Flammable
T:  Toxic
Risk Statements:  11-20/21-25-36/37/38-42 
R11:  Highly Flammable 
R20/21:  Harmful by inhalation and if swallowed 
R36/37/38:  Irritating to eyes, respiratory system and skin 
R42:  May cause sensitization by inhalation
Safety Statements  16-26-36/37/39-45 
S16:  Keep away from sources of ignition - No smoking 
S26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection 
S45:  In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
 WGK Germany:  3

Standards and Recommendations

DOT Classification:  3; Label: Flammable Liquid, Poison; DOT Class: 6.1; Label: Poison; DOT Class: 6.1; Label: Poison, Flammable Liquid; DOT Class: 3; Label: Flammable Liquid, Poison


 Ethyl isocyanate (109-90-0) may react with water to produce a corrosive liquid and carbon dioxide gas.

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