Dye carrier, solvent & chemical intermediate
1,2,4-Trichloro Benzene (1,2,4-TCB) Supplier & Distributor in India & Worldwide
Chelora Agrochem is a trusted 1,2,4-Trichloro Benzene (1,2,4-TCB) supplier and distributor in India, connecting buyers with high-purity material sourced from leading, quality-approved manufacturers. Our 1,2,4-trichlorobenzene meets 99% min purity with controlled isomer content, full documentation and reliable bulk supply across India and to buyers worldwide.
As a specialised distributor of chemical products, we do not manufacture in-house — instead we source only from reliable, audited manufacturers, giving you dependable material, competitive pricing and a single point of contact for all your 1,2,4-TCB requirements, backed by COA, MSDS and TDS on every order.
- CAS number
- 120-82-1
- Formula
- C6H3Cl3
- Molecular weight
- 181.45 g/mol
- Purity
- 99% min
Quick product specifications
1,2,4-Trichloro Benzene at a glance
Identifiers, physical data and trade codes for 1,2,4-TCB. Batch-specific figures are confirmed on the Certificate of Analysis supplied with each consignment, in India and on export shipments alike.
- Chemical name
- 1,2,4-Trichloro Benzene
- CAS number
- 120-82-1
- Molecular formula
- C6H3Cl3
- Molecular weight
- 181.45 g/mol
- IUPAC name
- 1,2,4-Trichlorobenzene
- EC number
- 204-428-0
- HS code
- 2903 99National subheading as per destination
- UN number
- UN 2321Chlorinated benzenes, liquid · Class 6.1, PG III. Some shippers declare it as UN 3082, class 9, PG III; the classification on your shipping documents applies
- Appearance
- Clear colourless liquidSolidifies below about 17 °C; may need warming in winter
- Melting point
- About 17 °C
- Boiling point
- 213–214 °C
- Density
- About 1.46 g/cm³Liquid, 20 °C
- Flash point
- About 110 °CClosed cup, combustible liquid
- Solubility
- Practically insoluble in waterMiscible with most common organic solvents
- Purity
- 99% min
- Synonyms
- 1,2,4-TCB1,2,4-TCB · unsym-Trichlorobenzene · Trichlorobenzene
- Product form
- Bulk liquid
- Documentation
- COA, MSDS & TDSSupplied with every order
Product overview
What is 1,2,4-Trichloro Benzene?
1,2,4-Trichloro Benzene (1,2,4-TCB) is a high-boiling chlorinated aromatic used as a dye carrier, a thermally stable process solvent and a feedstock for dichloroaniline chemistry. It is the most widely used of the three trichlorobenzene isomers.
With the formula C6H3Cl3 (CAS 120-82-1), 1,2,4-TCB is a clear colourless liquid that boils at about 213 °C, freezes near 17 °C and is practically insoluble in water while mixing freely with most organic solvents. It is made by the further chlorination of benzene or dichlorobenzene, with the isomers separated by distillation and crystallisation.
Its combination of a high boiling point, low water solubility and good solvency is what makes it useful: it dissolves disperse dyes and polyolefins that most solvents will not touch, and the three ring chlorines give chemists a handle for selective substitution to dichloroanilines.
How it is made
Benzene or dichlorobenzene is chlorinated in the presence of a Lewis acid catalyst, producing a mixture of trichlorobenzene isomers dominated by the 1,2,4 isomer. The crude mixture is separated by fractional distillation and crystallisation, and the 1,2,4 cut is dried and polished to specification.
What that means for your process
- Tightly controlled 1,2,3- and 1,3,5-isomer content, checked by GC
- Low moisture and low acidity for stable storage in mild steel
- Low colour (Hazen) for dye-carrier and solvent duty
- Supplied in drums, IBCs or bulk tankers to suit your charging system
Applications
What is 1,2,4-Trichloro Benzene used for?
1,2,4-TCB is used both as a performance solvent and as a chemical intermediate. Its main applications, industry by industry, include:
Dye carriers & textiles
A classic carrier for dyeing polyester and polyester blends with disperse dyes at atmospheric pressure.
- Swells polyester fibre so dye can penetrate
- Used in carrier blends for atmospheric dyeing
- Low water solubility keeps it in the carrier phase
Dye & agrochemical intermediates
Ammonolysis gives 2,5-dichloroaniline, a building block for azo pigments and crop-protection actives.
- Ammonolysis to 2,5-dichloroaniline
- Nitration to trichloronitrobenzene derivatives
- Feedstock for dichloroaniline-based actives
Process solvent & heat transfer
A thermally stable, high-boiling solvent for reactions, cleaning and heat-transfer duty.
- High-temperature reaction and recrystallisation solvent
- Dielectric and heat-transfer fluid formulations
- Mobile phase for high-temperature GPC of polyolefins
Process route
How is 1,2,4-TCB used to make 2,5-dichloroaniline?
The principal synthetic outlet for 1,2,4-TCB is the 2,5-dichloroaniline (2,5-DCA) route. The trichlorobenzene is aminated with ammonia under pressure to displace one ring chlorine, and the resulting dichloroaniline is diazotised and coupled into azo pigments and dyes, or taken on to agrochemical actives.
1,2,4-Trichloro Benzene
Charged as the chlorinated aromatic feedstock. Isomer purity decides downstream selectivity.
C6H3Cl3Ammonolysis
Reacted with ammonia under pressure, with a catalyst, to displace one ring chlorine.
NH3, pressure2,5-Dichloroaniline
Isolated and purified as the key aniline building block.
2,5-DCAPigments & actives
Diazotised and coupled to azo pigments, or converted to agrochemical actives.
Azo pigmentsIn depth
1,2,4-Trichloro Benzene applications by industry
Below is a detailed breakdown of where 1,2,4-TCB is used and the role it plays in each downstream product.
| Industry | Typical downstream products | Role of 1,2,4-TCB |
|---|---|---|
| Textiles & dyeing | Polyester dye carrier formulations | Carrier solvent |
| Dyes & pigments | 2,5-Dichloroaniline, azo pigments | Starting material |
| Agrochemicals | Dichloroaniline-based actives | Intermediate |
| Industrial fluids | Dielectric fluids, heat-transfer media, degreasers | Solvent |
| Polymer analysis | High-temperature GPC / HPLC of polyolefins | Analytical solvent |
Safety
Is 1,2,4-Trichloro Benzene hazardous?
Yes — though less acutely toxic than the nitroaromatics, 1,2,4-TCB is harmful if swallowed, irritating to skin and eyes, may irritate the respiratory tract, and is very toxic to aquatic life with long-lasting effects. It is a combustible liquid with a flash point around 110 °C.
1,2,4-TCB should be stored in sealed drums, IBCs or tanks in a cool, dry, ventilated place away from heat, ignition sources, strong oxidisers and strong bases, and handled with chemical-resistant gloves, goggles and protective clothing, with local exhaust ventilation where vapour or mist can form. Because of its aquatic toxicity, bunding and spill containment matter as much as personal protection. A full MSDS is supplied with every order.
Signal word: Warning
Harmful if swallowed · causes skin and eye irritation · may cause respiratory irritation · very toxic to aquatic life with long-lasting effects
Safe-handling essentials
- Chemical-resistant gloves, goggles and protective clothing
- Local exhaust ventilation where vapour or mist can form
- Avoid prolonged or repeated skin contact
- Keep drums and IBCs closed; store cool, dry and out of sunlight
- Store away from strong oxidisers, strong bases and ignition sources
- Bund storage and never allow release to drains, soil or waterways
- Transport as UN 2321, class 6.1, packing group III
Grades
1,2,4-Trichloro Benzene grades & technical specifications
We supply 1,2,4-TCB in standard industrial grade and in low-colour, low-isomer grades for dye-carrier and analytical solvent work.
| Parameter | Specification |
|---|---|
| Assay (1,2,4-isomer) | 99% min |
| Appearance | Clear colourless liquid, free from suspended matter |
| 1,2,3-Trichlorobenzene | 0.5% max |
| 1,3,5-Trichlorobenzene | 0.3% max |
| Total dichlorobenzenes | 0.3% max |
| Colour (APHA / Hazen) | 20 max |
| Moisture | 0.05% max |
| Acidity (as HCl) | 0.005% max |
Note: Values are representative. Batch-specific figures are provided on the Certificate of Analysis (COA) supplied with each consignment.
Supply
Packaging, MOQ & supply
From trial quantities for process validation to repeat container loads on contract — packed, documented and dispatched to your plant in India or overseas.
Packaging
250 kg MS or HDPE drums, 1000 litre IBCs, or bulk in ISO tank containers and road tankers as per quantity.
Minimum order quantity
Flexible — single drums for trials through to full tank-container loads.
Shelf life
Long shelf life in sealed, unopened drums stored cool, dry and out of direct sunlight.
Dispatch
Pan-India dispatch and worldwide export with complete dangerous-goods documentation and logistics support.
Why buy from us
Why choose Chelora as your 1,2,4-TCB supplier?
As an established 1,2,4-Trichloro Benzene supplier and distributor based in India and shipping worldwide, we work with a wide network of trusted manufacturers to combine consistent quality with dependable service. More about Chelora Agrochem.
High purity, every batch
99% min assay, sourced only from quality-approved manufacturers we have worked with and audited.
Full documentation
COA, MSDS and TDS travel with every order, so your QA and EHS teams are never chasing paperwork.
Reliable bulk supply, flexible MOQ
Single packs for process trials through to repeat container loads on schedule.
Worldwide supply
Export-grade packing, dangerous-goods documentation and on-time dispatch to plants across Asia, the Middle East, Europe, Africa and the Americas.
Technical & safe-handling support
Guidance on storage, PPE, material compatibility and process fit from a team that knows chlorinated aromatics.
One point of contact
Source 1,2,4-TCB alongside your other intermediates — one enquiry, one team, one invoice.
Ordering
How to order 1,2,4-Trichloro Benzene from Chelora
Ordering is simple and fast — most enquiries are answered with pricing and availability within 24 hours.
- 1
Send your enquiry
Tell us the grade, quantity and application you are buying for.
- 2
Receive a quotation
We send pricing along with the COA and MSDS for your review.
- 3
Request a sample
Test suitability for your process before you commit to a bulk order.
- 4
Confirm the order
Lock in quantity, packaging and delivery preference.
- 5
Dispatch & tracking
We dispatch with full documentation and keep you updated until delivery.
Documentation
1,2,4-Trichloro Benzene MSDS & COA
A summary of key safety information and a representative Certificate of Analysis. The complete 16-section Safety Data Sheet and the actual batch COA are supplied with each shipment — and both are sent with your quotation when you ask for a quote.
Safety data summary (MSDS)
| Section | Details |
|---|---|
| Hazard classification | Acute toxicity cat. 4 (oral); skin irritation cat. 2; eye irritation cat. 2; STOT SE cat. 3 (respiratory irritation); aquatic acute cat. 1; aquatic chronic cat. 1 |
| Signal word | Warning |
| First aid — inhalation | Move to fresh air; keep at rest; get medical advice if symptoms persist |
| First aid — skin | Remove contaminated clothing; wash thoroughly with soap & water |
| First aid — eyes | Rinse with water for several minutes; get medical advice |
| Handling | Use PPE; avoid vapour and mist; ventilate; keep away from ignition sources |
| Storage | Cool, dry, sealed and bunded; away from heat, oxidisers & strong bases |
| Environment | Very toxic to aquatic life with long-lasting effects; prevent release to drains / waterways |
| Transport | UN 2321; class 6.1; packing group III |
Certificate of Analysis (representative)
| Test parameter | Specification | Method |
|---|---|---|
| Assay (1,2,4-isomer) | 99% min | GC |
| Appearance | Clear colourless liquid | Visual |
| 1,2,3-Isomer | 0.5% max | GC |
| 1,3,5-Isomer | 0.3% max | GC |
| Colour (APHA) | 20 max | Comparator |
| Moisture | 0.05% max | Karl Fischer |
The actual batch COA is supplied with each shipment.
FAQ
Frequently asked questions
Common questions from buyers specifying 1,2,4-TCB for dye-carrier, solvent, agrochemical and analytical applications.
What is 1,2,4-Trichloro Benzene used for?
1,2,4-TCB is used as a dye carrier for polyester dyeing, as a high-boiling process solvent and heat-transfer fluid, as the feedstock for 2,5-dichloroaniline and azo pigments, in dielectric and lubricant formulations, and as the standard solvent for high-temperature GPC analysis of polyolefins.
What is the CAS number of 1,2,4-TCB?
The CAS number is 120-82-1 and the molecular formula is C6H3Cl3, with a molecular weight of 181.45 g/mol. It is also known as 1,2,4-trichlorobenzene or unsym-trichlorobenzene.
How is 1,2,4-Trichloro Benzene made?
Benzene or dichlorobenzene is chlorinated over a Lewis acid catalyst, giving a mixture of trichlorobenzene isomers in which the 1,2,4 isomer predominates. The isomers are separated by fractional distillation and crystallisation.
Is 1,2,4-Trichloro Benzene hazardous?
Yes. It is harmful if swallowed, causes skin and eye irritation, may cause respiratory irritation, and is very toxic to aquatic life with long-lasting effects. It is also a combustible liquid. Handle it with PPE, ventilation and bunded storage; we supply a full MSDS with every order.
What is the difference between 1,2,4-TCB and 1,2,3-TCB?
They are isomers with the same formula. In 1,2,4-TCB the chlorines are at positions 1, 2 and 4 and the product is a liquid at room temperature, freezing near 17 °C. In 1,2,3-TCB they are adjacent and the product is a crystalline solid melting near 53 °C. The 1,2,4 isomer is the commercially dominant one.
How should 1,2,4-TCB be stored?
In sealed drums, IBCs or tanks in a cool, dry, well-ventilated and bunded store, away from heat, ignition sources, strong oxidisers and strong bases. Keep it out of direct sunlight; if it solidifies in cold weather, warm it gently and uniformly before use.
Do you provide COA and MSDS for 1,2,4-TCB?
Yes, we provide a batch-specific COA and MSDS with every order, plus technical support on request.
Do you supply and export 1,2,4-Trichloro Benzene?
Yes, we supply 1,2,4-TCB across India and export internationally with complete dangerous-goods documentation, sourced from reliable manufacturers.
Request a quote or sample
Need a reliable 1,2,4-TCB supplier?
Looking for a dependable 1,2,4-Trichloro Benzene (1,2,4-TCB) supplier and distributor — in India or anywhere we export to? Tell us the grade and quantity you need — our team responds with competitive bulk pricing, samples and complete documentation (COA, MSDS, TDS) within 24 hours.
Or email source@cheloraagrochem.com