Toluene-2,4-diisocyanate (TDI-80/20) CAS 584-84-9 Full Export Specification

1. Basic Chemical Identification

• IUPAC Name: 2,4-Diisocyanatotoluene
• Aliases: TDI, Toluene Diisocyanate, TDI-80, industrial mixed isomer (80% 2,4-TDI + 20% 2,6-TDI)
• CAS No.: 584-84-9 (for 2,4-TDI monomer, general registration CAS for industrial mixed TDI)
• EINECS: 209-544-3
• MDL No.: MFCD00002011
• Molecular Formula: \(\boldsymbol{C_9H_6N_2O_2}\)
• Molecular Weight: 174.16
• SMILES: O=C=Nc1ccc(C)cc1N=C=O
• HS Code: 29291010000
• UN Number: UN 2078
• IMDG Hazard Class: Class 6.1 Toxic Liquid, Packing Group II
• Signal Word: Danger
• Regulatory Note: REACH SVHC candidate substance, suspected carcinogen, severe respiratory sensitizer, violently reacts with water releasing CO₂, severe marine pollutant, strictly controlled high-risk isocyanate worldwide

2. Physical & Chemical Properties

1. Appearance: Colorless to pale yellow transparent oily liquid with strong pungent irritant isocyanate odor; gradually darkens under sunlight and air exposure
2. Melting/Crystallization Point (TDI-80): 13–15 ℃
3. Boiling Point: 251 ℃ @760 mmHg
4. Density (20 ℃): 1.220–1.224 g/mL, heavier than water and sinks to the bottom
5. Refractive Index \(n_{20}^D\): 1.5640–1.5660
6. Closed-cup Flash Point: 132 ℃
7. Autoignition Temperature: 620 ℃
8. Explosion Limit in Air: 0.9 ~ 9.5 vol%
9. Vapor Pressure: 0.03 mbar @20 ℃; vapor density 6.01 (much heavier than air and accumulates in low-lying areas)
10. Solubility: Fully miscible with anhydrous toluene, xylene, ethyl acetate, dichloromethane and mineral oil; undergoes violent exothermic reaction with water, alcohols and amines, generating CO₂ and insoluble polyurea precipitate
11. Stability
    • Extremely sensitive to moisture; must be stored under nitrogen-sealed dry conditions. Contact with water or amines triggers rapid polymerization and pressure buildup inside sealed containers
    • Contains two reactive -NCO functional groups, serving as core crosslinker to react with polyols and polyamines for polyurethane production
    • Incompatible with water, methanol, ethanol, ammonia, strong alkalis, strong oxidants, tin/amine polymerization catalysts
12. Core GHS Hazards
    • H302+H311+H331: Toxic if swallowed, in contact with skin or inhaled
    • H314: Causes severe irreversible skin burns and permanent eye damage
    • H317: Strong skin sensitizer that easily induces allergic dermatitis
    • H334: Fatal sensitization upon inhalation, triggers asthma and pulmonary edema
    • H351: Suspected of causing cancer
    • H410: Very toxic to aquatic life with long-lasting bioaccumulation effects

3. Standard COA Technical Specifications

Grade 1: Industrial PU Foam Grade (TDI-80/20, mainstream bulk export standard)

Grade 2: High-Purity Coating & Elastomer Grade (Low Free Chloride)

4. Main Industrial Applications

1. Core Raw Material for Flexible Polyurethane Foam (Largest Consumption)

2. PU Synthetic Leather & Microfiber Elastomer

3. Polyurethane Coatings, Adhesives & Sealants

• Two-component PU industrial anti-corrosion coatings, wood varnishes and floor paints
• PU adhesives for textiles, automotive interiors and composite materials

4. Fine Chemical Crosslinking Intermediate

5. Laboratory Synthetic Reagent

5. Export Packaging, Storage & Transportation

Standard Packaging Options

1. Industrial bulk: 200L anti-static carbon steel drum, vacuum nitrogen pre-purged with airtight PTFE cap, net weight ~244kg/drum
2. Stainless steel insulated ISO tank container (24–28 MT): Pre-dried and nitrogen blanketed before filling, suitable for full container bulk sea shipment
3. Lab small packing: 1L / 2.5L thick-wall amber pressure-resistant glass bottles with nitrogen protection
   
   
   All pallets fixed with anti-vibration steel strapping and fully wrapped waterproof composite film. Transit temperature strictly controlled ≤25 ℃, avoid direct sunlight, collision and moisture infiltration.

Mandatory Warehouse Storage Regulations

• Independent dedicated Class6.1 toxic liquid warehouse with full explosion-proof negative-pressure ventilation, indoor temperature below 25 ℃ and relative humidity <60%
• All drums fully nitrogen-sealed to isolate moisture and prevent polymerization
• Strictly segregated from water sources, alcohols, amines, oxidants, alkaline cargo and food raw materials
• Equipped with continuous isocyanate vapor concentration alarm, dry powder fire suppression system and complete static grounding facilities

Ocean Transport Regulations (IMDG UN 2078)

• Mixed loading with water-containing cargo, alcohols, amines, oxidants, alkaline goods and food products is completely prohibited
• All drums/tanks must undergo tightness inspection before loading; full set of toxic dangerous goods export documents is mandatory for customs clearance worldwide

6. Full GHS Hazard Statements & Mandatory PPE

Hazard Statements

• H302: Harmful if swallowed
• H311: Toxic in contact with skin
• H314: Causes severe skin burns and eye damage
• H317: May cause an allergic skin reaction
• H331: Toxic if inhaled
• H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled
• H351: Suspected of causing cancer
• H410: Very toxic to aquatic life with long lasting effects

Mandatory PPE

1. Half-face respirator with ABEK organic vapor filter cartridge; full-face positive-pressure SCBA required for tank pumping and leakage emergency disposal
2. Double-layer protection: fully sealed chemical safety goggles + full flame-retardant anti-splash face shield
3. Double thick butyl rubber solvent-resistant impermeable gloves (nitrile gloves only for extremely short contact)
4. Impermeable anti-static full-body anti-toxic protective coveralls + heavy chemical resistant rubber boots
5. Local negative-pressure explosion-proof closed fume hood for all sampling, pumping and feeding operations; open-air handling is strictly prohibited

Spill & First Aid Emergency Treatment

1. Spill disposal: Evacuate all irrelevant personnel immediately and cut all ignition sources and static sparks. Build barriers with dry inert sand to contain liquid; absorb leakage with anhydrous sand only (water contact is strictly forbidden to avoid violent reaction and toxic mist generation). Collect waste into airtight steel hazardous waste drums; neutralize residual materials slowly with solid soda ash. Never discharge waste directly into sewers or water bodies.
2. Skin contact: Remove contaminated clothing at once and flush affected skin with plenty of running soapy water continuously for no less than 30 minutes; hospital observation for toxic burns is required.
3. Eye contact: Irrigate eyes with steady clean running water non-stop for a minimum of 30 minutes and seek urgent ophthalmic treatment.
4. Inhalation: Move the victim to fresh dry air instantly and supply high-concentration oxygen for throat burning, severe coughing and dyspnea.
5. Ingestion: Do NOT induce vomiting and temporarily avoid water intake. Administer activated charcoal orally and transport the patient to a toxic emergency center together with the SDS document.

7. Foreign Trade Selling Advantages

1. Two available grades: industrial PU foam bulk grade and high-purity coating/elastomer grade, with controlled low hydrolyzable chloride impurities to avoid yellowing and performance defects of polyurethane finished products
2. Vacuum nitrogen-blanketed airtight steel drums and insulated stainless steel ISO tank packaging, effectively preventing moisture-induced polymerization and leakage during long-distance cross-ocean transportation
3. Complete set of export documents for Class6.1 toxic dangerous goods (COA, English SDS, UN packaging certificate, IMDG maritime declaration, certificate of origin, impurity test report), fully compliant with global IMDG maritime and REACH regulations
4. Flexible supply scheme: small lab bottles, 200L bulk drums and full FCL ISO tank bulk shipments for trial orders and mass production demand
5. Globally mainstream aromatic isocyanate raw material for flexible PU foam and synthetic leather manufacturing, with stable crosslinking reactivity. We are a long-term stable supplier for polyurethane foam, coating and synthetic leather manufacturers all over the world.

8. Complete Set of Export Supporting Documents

• Batch Certificate of Analysis (COA)
• English SDS Safety Data Sheet (special version for moisture-sensitive toxic aromatic isocyanate liquid)
• UN Dangerous Goods Packaging Qualification Certificate (UN 2078)
• IMDG Maritime Dangerous Goods Declaration File (Class6.1 PG II)
• Certificate of Origin
• Hydrolyzable chloride and moisture impurity compliance test report
• REACH registration excerpt (for EU market supply)

Ready-to-Send English Foreign Trade Development Email

1. Industrial PU foam grade ≥99.70%: Controlled low hydrolyzable chloride and moisture impurities, stable crosslinking reactivity for mass flexible foam production lines, cost-effective bulk raw material for foam factories.
2. High purity coating & elastomer grade ≥99.85%: Ultra-low trace acid and hydrolyzable contaminants, dedicated for high-gloss PU floor coating, cast elastomer and high-grade microfiber leather manufacturing.