1,3-PHENYLENE DIISOCYANATE Property

Melting point:

49-51 °C(lit.)

Boiling point:

121 °C25 mm Hg(lit.)

Density 

1.3848 (rough estimate)

refractive index 

1.4900 (estimate)

Flash point:

>230 °F

storage temp. 

2-8°C

form 

powder to lump

color 

Crystals

Water Solubility 

Soluble in hot benzene. Hydrolyzes in water.

Sensitive 

Moisture Sensitive

BRN 

776957

CAS DataBase Reference

123-61-5(CAS DataBase Reference)

EPA Substance Registry System

1,3-Phenylene diisocyanate (123-61-5)

Safety

Hazard Codes 

Xn

Risk Statements 

20/21/22-36/37/38-42

Safety Statements 

22-26-36/37

RIDADR 

UN 2810 6.1/PG 3

WGK Germany 

3

RTECS 

NR0150000

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

29291000

Toxicity

LD50 ivn-mus: 5600 mg/kg CSLNX* NX#07804

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H315Causes skin irritation

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H334May cause allergy or asthma symptoms or breathing difficulties if inhaled

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

1,3-PHENYLENE DIISOCYANATE Chemical Properties,Usage,Production

Chemical Properties

White to off-white fused solid

Uses

1,??3-??Phenylene Diisocyanate is a reagent used in the synthesis of polyurethane materials and other thermoplastics.Environmental toxin on US EPA Toxic Release Inventory list (TRI) list.

Reactivity Profile

Isocyanates and thioisocyanates, such as 1,3-PHENYLENE DIISOCYANATE, 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. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].

Safety Profile

A sensitizer at very low concentrations. Deadly poison by intravenous route. When heated to decomposition it emits toxic fumes of NOx and CN-. See also ESTERS.