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Toluene-2,4-diisocyanate

Name: Toluene-2,4-diisocyanate
SKU: 0

Basic Information

CAS No.: 584-84-9
Molecular Formula: C₉H₆N₂O₂
Molecular weight: 174.16

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Product Details

TDI is an important basic chemical raw material for the production of polyurethane (PU) materials.

Chemical Properties

Property	Specification
Chemical Name	Toluene-2,4-diisocyanate
Chinese Name	2,4-Toluene Diisocyanate
CAS No.	584-84-9
Abbreviation	2,4-TDI / TDI
Molecular Formula	C₉H₆N₂O₂
Molecular Weight	174.16 g/mol
Chemical Class	Organic Chemical
Chemical Type	Isocyanate / Diisocyanate
Appearance	Colorless to light yellow liquid or solid, depending on temperature
Odor	Pungent odor
Melting Point	Approx. 21–22°C
Boiling Point	Approx. 251°C
Solubility in Water	Insoluble; reacts with water
Main Applications	Polyurethane foams, coatings, elastomers, adhesives and sealants

Safety Information

Item	Information
Hazard Classification	Acute Toxicity, Skin Irritation, Eye Irritation, Skin Sensitization, Respiratory Sensitization, Carcinogenicity
Signal Word	Danger
GHS Pictograms	GHS06 – Acute Toxicity / GHS08 – Health Hazard
Inhalation Hazard	Fatal if inhaled; may cause respiratory irritation, allergy, asthma symptoms or breathing difficulties
Skin Contact	Causes skin irritation; may cause an allergic skin reaction
Eye Contact	Causes serious eye irritation
Carcinogenicity	Suspected of causing cancer
Environmental Hazard	Harmful to aquatic life with long-lasting effects
Handling	Use only in a well-ventilated area. Avoid breathing vapors, mist or aerosols.
Personal Protection	Wear appropriate protective gloves, protective clothing, eye protection and face protection
Storage	Keep container tightly closed and protect from moisture, heat and incompatible materials
Special Precautions	Avoid contact with water and moisture. TDI can react with moisture and generate CO₂, which may cause pressure buildup in closed containers.
Emergency Documentation	Refer to the latest SDS before handling, storage, transportation or disposal

Product Applications

Toluene-2,4-diisocyanate (TDI) is an important aromatic diisocyanate used primarily as a raw material for the production of polyurethane materials. Its high reactivity with polyols makes it suitable for a wide range of polyurethane applications.

Main Applications:

Flexible Polyurethane Foams
Widely used in the production of flexible polyurethane foams for mattresses, furniture, cushions and automotive seating.
Polyurethane Elastomers
Used as a key raw material for polyurethane elastomers requiring flexibility, resilience and mechanical strength.
Coatings
Used in polyurethane coating formulations to provide durable and high-performance protective finishes.
Adhesives & Sealants
Used in the production of polyurethane adhesives and sealants for industrial and construction applications.
Automotive Materials
Applied in polyurethane materials used for automotive seats, interior components and other cushioning applications.
Furniture & Bedding
An important raw material for polyurethane foam used in furniture cushioning, mattresses and other comfort products.

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