Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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2,4-Diisocyanatotoluene(584-84-9)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
2,4-Diisocyanatotoluene
Synonyms
2,4-Diisocyanato-1-methylbenzene
2,4-Diisocyanatotoluene
2,4-Tolyenediisocyanate
4-Methyl-m-phenylene diisocyanate
Heylene tlc
TDI
CAS
584-84-9
Formula
C9H6N2O2
Molecular Weight
174.16
EINECS
209-544-5
RTECS
CZ6300000
RTECS Class
Tumorigen; Mutagen; Human Data; Primary Irritant
Merck
12,9668
Beilstein/Gmelin
744602
Beilstein Reference
4-13-00-00243
EC Index Number
615-006-00-4
EC Class
Carcinogenic Category 3; Very toxic; Irritant; Sensitising; Dangerous for the Environment

Physical and Chemical Properties

Appearance
Water white to pale yellow liquid or crystals with a sweet, fruity, pungent odor. Darkens on exposure to sunlight.
Solubility in water
Insoluble
Melting Point
21
Boiling Point
251
Vapor Pressure
0.008 (25 C)
Density
1.218 g/cm3 (20 C)
Heat Of Vaporization
40.61 kJ/mol
Heat Of Combustion
-4126 kJ/mol
Usage
Chemical intermediate.
Saturation Concentration
33 ppm (25 C)
Odor threshold
0.4-2.14 ppm
Refractive Index
1.5678 (20 C)

First Aid Measures

Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Get medical aid if symptoms occur.
Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Handling and Storage

Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture. Store under an inert atmosphere.
Handling
Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Avoid breathing dust, vapor, mist, or gas. Do not allow contact with water.

Hazards Identification

Inhalation
May be fatal if inhaled. Causes respiratory tract irritation.
Skin
Causes skin irritation.
Eyes
Causes eye irritation.
Ingestion
Causes gastrointestinal tract irritation.
Hazards
When heated to decomposition it emits very toxic fumes of cyanide and nitrogen oxides. Reacts violently with amines, alcohol, bases and warm water causing fire and explosion hazards. Avoid strong oxidizers, water, acids, bases, amines, etc., cause foam and splatter. Avoid heating. Hazardous polymerization may occur. Concentrated alkaline compound such as sodium hydroxide or tertiary amines may cause run-away polymerization. Slow, not hazardous polymerization may occur above 235F.
EC Risk Phrase
R 26 36/37/38 40 42/43 52/53
EC Safety Phrase
S 23 36/37 45 61
UN (DOT)
2078

Exposure Controls/Personal Protection

Personal Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Exposure Effects
Acute exposures may produce headache, insomnia, euphoria, ataxia, anxiety neurosis with depression, paranoid tendencies, or impotence. No data were available to assess the teratogenic potential of this agent. <br>No data were available to assess the potential effects of exposure to this agent during pregnancy or lactation.
Exposure limit(s)
NIOSH REL: Ca See Appendix A OSHA PEL: C 0.02 ppm (0.14 mg/m3) IDLH Ca [2.5 ppm]
Poison Class
2

Fire Fighting Measures

Flash Point
127
Autoignition
> 620
Fire Fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Extinguishing media: For large fires, use water spray or fog. Do NOT get water inside containers. Do NOT use straight streams of water. Cool containers with flooding quantities of water until well after fire is out. For small fires, use dry chemical or carbon dioxide.
Upper exp. limit
9.5
Lower exp. limit
.9
Fire Potential
Slightly flammable. Combustible when exposed to heat or flame.

Accidental Release Measures

Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Provide ventilation. Do not expose spill to water. Do not get water inside containers.

Stability and Reactivity

Disposal Code
9
Incompatibilities
Alcohols - strong bases - amines - acids - heat - light - strong oxidizing agents - moisture.
Stability
Stable under normal temperatures and pressures.
Decomposition
Hydrogen cyanide, nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.
Combustion Products
Toxic oxides of nitrogen are produced during combustion of this material.

Transport Information

UN Number
2078
Hazard Class
6.1
Packing Group
II
HS Code
2929 10 10
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