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Toluene diisocyanate

Name: Toluene diisocyanate
SKU: 0

Basic Information

CAS No.: 26471-62-5
Molecular Formula: C₉H₆N₂O₂
Molecular weight: 174.16

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Product Details

Toluene Diisocyanate (TDI) is an aromatic diisocyanate widely used as a key raw material in polyurethane manufacturing. Its reactive isocyanate groups readily react with polyols and other active-hydrogen compounds to form polyurethane materials with a wide range of properties.

Chemical Properties

Item	Specification
Chemical Name	Toluene Diisocyanate
CAS No.	26471-62-5
EC No.	247-722-4
Abbreviation	TDI
Synonyms	Toluylene Diisocyanate; 4-Methyl-m-phenylene Diisocyanate; TDI
Chemical Formula	C₉H₆N₂O₂
Molecular Weight	174.16 g/mol
Chemical Class	Organic Chemical
Chemical Type	Aromatic Diisocyanate
Isomer Composition	Typically a mixture of 2,4-TDI and 2,6-TDI
Appearance	Colorless to light-yellow clear liquid
Odor	Sharp / pungent odor
Melting Point	Approx. 12–14°C
Boiling Point	Approx. 247°C at atmospheric pressure
Density	Approx. 1.22 g/cm³ at 20°C
Flash Point	Approx. 132–137°C
Vapor Pressure	Approx. 0.03 hPa at 20°C
Water Solubility	Reacts with water
Solubility	Soluble in many organic solvents
Autoignition Temperature	Approx. 620°C
Main Chemical Function	Reactive diisocyanate used in polyurethane production
Main Applications	Polyurethane foams, elastomers, coatings, adhesives and sealants

Safety Information

Item	Safety Information
Hazard Classification	Acute Toxicity; Skin Irritation; Eye Irritation; Skin Sensitization; Respiratory Sensitization; Specific Target Organ Toxicity; Carcinogenicity; Aquatic Chronic Hazard
Signal Word	Danger
GHS Pictograms	GHS06 – Toxic / GHS08 – Health Hazard
H330	Fatal if inhaled
H315	Causes skin irritation
H317	May cause an allergic skin reaction
H319	Causes serious eye irritation
H334	May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335	May cause respiratory irritation
H351	Suspected of causing cancer
H412	Harmful to aquatic life with long-lasting effects
Inhalation Hazard	Avoid breathing vapors, mist or aerosols. Inhalation may cause severe respiratory effects and sensitization.
Skin Contact	May cause irritation and allergic skin reactions. Avoid direct contact.
Eye Contact	Causes serious eye irritation. Use suitable eye and face protection.
Respiratory Sensitization	May cause respiratory sensitization and asthma-like symptoms in sensitive individuals.
Handling	Handle only with adequate ventilation. Avoid generating vapors, mist or aerosols.
Personal Protection	Chemical-resistant gloves, protective clothing and eye/face protection. Appropriate respiratory protection may be required.
Moisture Sensitivity	Reacts with water and moisture. Keep containers tightly closed and protected from moisture.
Storage	Store in a cool, dry and well-ventilated area. Protect from heat, moisture, light and incompatible materials.
Emergency Response	Move exposed persons to fresh air and seek immediate medical attention in case of inhalation exposure or breathing difficulty.
Environmental Precaution	Prevent uncontrolled release into drains, soil or water.
Safety Documentation	Always refer to the latest supplier SDS and applicable local regulations before handling or transportation.

Product Applications

01 — Flexible Polyurethane Foams

TDI is primarily used in the production of flexible polyurethane foams for furniture, mattresses, bedding, automotive seats and other cushioning applications.

02 — Polyurethane Elastomers

TDI is used to produce polyurethane elastomers for automotive components, industrial rollers, mechanical parts, footwear and other applications requiring flexibility and durability.

03 — Polyurethane Coatings

TDI is used as a reactive raw material for polyurethane coatings, including automotive finishes, wood coatings, protective coatings and high-performance industrial coatings.

04 — Adhesives & Sealants

TDI can be used in the formulation of polyurethane-based adhesives and sealants, providing strong bonding performance and good mechanical properties.

05 — Automotive Applications

TDI-based polyurethane materials are widely used in automotive seating, cushioning materials, interior components, elastomers and protective coatings.

06 — Furniture & Bedding

Flexible polyurethane foams produced with TDI are commonly used in mattresses, sofas, cushions, furniture padding and other comfort products.

07 — Construction & Insulation

TDI-based polyurethane materials can be used in selected insulation, sealing and protective applications within the construction industry.

08 — Industrial Materials

TDI is also used in the production of polyurethane materials for industrial equipment, mechanical components, protective coatings and specialty applications.

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