Herbicide & pharma intermediate
3,4-Dichloro Nitro Benzene (3,4-DCNB) Supplier & Distributor in India & Worldwide
Chelora Agrochem is a trusted 3,4-Dichloro Nitro Benzene (3,4-DCNB) supplier and distributor in India, connecting buyers with high-purity material sourced from leading, quality-approved manufacturers. Our 1,2-dichloro-4-nitrobenzene meets 99% min purity with controlled 2,3-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 3,4-DCNB requirements, backed by COA, MSDS and TDS on every order.
- CAS number
- 99-54-7
- Formula
- C6H3Cl2NO2
- Molecular weight
- 192.00 g/mol
- Purity
- 99% min
Quick product specifications
3,4-Dichloro Nitro Benzene at a glance
Identifiers, physical data and trade codes for 3,4-DCNB. Batch-specific figures are confirmed on the Certificate of Analysis supplied with each consignment, in India and on export shipments alike.
- Chemical name
- 3,4-Dichloro Nitro Benzene
- CAS number
- 99-54-7
- Molecular formula
- C6H3Cl2NO2
- Molecular weight
- 192.00 g/mol
- IUPAC name
- 1,2-Dichloro-4-nitrobenzene
- EC number
- 202-764-2
- HS code
- 2904 99National subheading as per destination
- UN number
- Typically UN 2811Toxic solid, organic, n.o.s. · Class 6.1 — confirm on SDS
- Appearance
- Pale yellow crystalline solidLow melting — often handled molten
- Melting point
- 39–41 °C
- Boiling point
- 255–256 °C
- Density
- About 1.46 g/cm³Molten, about 75 °C
- Flash point
- About 123 °CClosed cup, combustible
- Solubility
- Practically insoluble in waterSoluble in common organic solvents
- Purity
- 99% min
- Synonyms
- 3,4-DCNB1,2-Dichloro-4-nitrobenzene · 4-Nitro-1,2-dichlorobenzene
- Product form
- Solid in drums or molten
- Documentation
- COA, MSDS & TDSSupplied with every order
Product overview
What is 3,4-Dichloro Nitro Benzene?
3,4-Dichloro Nitro Benzene (3,4-DCNB) is a dichlorinated nitroaromatic used mainly as the precursor of 3,4-dichloroaniline, the aniline behind the urea and amide herbicides diuron, linuron and propanil. It is also converted by halogen exchange into 3-chloro-4-fluoronitrobenzene, a pharmaceutical intermediate.
With the formula C6H3Cl2NO2 (CAS 99-54-7), 3,4-DCNB is a pale yellow solid that melts at about 40 °C, so it is often stored and shipped molten. It is made by nitrating o-dichlorobenzene.
The chlorine para to the nitro group is activated for substitution, while the meta chlorine stays in place — which is why 3,4-DCNB can be fluorinated selectively, and why buyers specify the 2,3-isomer content closely.
How it is made
o-Dichlorobenzene is nitrated with mixed nitric and sulfuric acid. The main product is 3,4-DCNB, with roughly a tenth as 2,3-DCNB; the isomers are separated by crystallisation and distillation.
What that means for your process
- Selectively activated para-chlorine for halogen exchange
- 2,3-isomer content controlled to grade, checked by GC
- Low moisture and acidity for clean hydrogenation
- Solid or molten supply to suit your plant
Applications
What is 3,4-Dichloro Nitro Benzene used for?
3,4-DCNB is used almost entirely as a chemical intermediate. Its main applications, industry by industry, include:
Herbicides
Hydrogenated to 3,4-dichloroaniline, the backbone of several urea and amide herbicides.
- Diuron and linuron via 3,4-dichlorophenyl isocyanate
- Propanil via acylation of 3,4-DCA
- Also used for neburon and related actives
Pharmaceuticals
Fluorinated to 3-chloro-4-fluoronitrobenzene and reduced to 3-chloro-4-fluoroaniline for API synthesis.
- Halex reaction with potassium fluoride
- 3-Chloro-4-fluoroaniline for quinolone and kinase-inhibitor intermediates
- Antibacterial triclocarban via 3,4-DCA
Dyes & fine chemicals
Specified where a 3,4-dichlorophenyl group is needed in dyes, pigments or custom molecules.
- Azo dye and pigment intermediates
- Custom synthesis and research scale-up
Process route
How is 3,4-DCNB used in herbicide manufacturing?
3,4-DCNB is reduced to 3,4-dichloroaniline, which is converted to 3,4-dichlorophenyl isocyanate or acylated directly. The isocyanate reacts with dimethylamine to give diuron, or with N,O-dimethylhydroxylamine to give linuron; acylation with propionyl chloride gives propanil.
3,4-Dichloro Nitro Benzene
Charged as the nitro compound. Assay and 2,3-isomer content decide aniline quality.
C6H3Cl2NO2Catalytic hydrogenation
Reduced with hydrogen over a catalyst, with dehalogenation suppressed.
H2 / catalyst3,4-Dichloroaniline
The herbicide aniline, converted to the isocyanate or acylated.
3,4-DCAHerbicide active
Urea or amide formation completes the molecule — diuron, linuron or propanil technical.
DiuronIn depth
3,4-Dichloro Nitro Benzene applications by industry
Below is a detailed breakdown of where 3,4-DCNB is used and the role it plays in each downstream product.
| Industry | Typical downstream products | Role of 3,4-DCNB |
|---|---|---|
| Herbicides | Diuron, linuron, propanil, neburon | Precursor via 3,4-DCA |
| Pharmaceuticals | 3-Chloro-4-fluoroaniline-based APIs | Precursor via halogen exchange |
| Antimicrobials | Triclocarban | Precursor via 3,4-DCA |
| Dyes & pigments | Azo dye intermediates | Intermediate |
| Fine chemicals | Custom 3,4-dichlorophenyl molecules | Building block |
Safety
Is 3,4-Dichloro Nitro Benzene hazardous?
Yes. 3,4-DCNB is harmful if swallowed and can be absorbed through the skin, may cause methaemoglobinaemia at high exposure, and is toxic to aquatic life with long-lasting effects. With correct PPE, ventilation and storage it is safely handled in industry.
3,4-DCNB should be stored in sealed containers in a cool, dry, ventilated place away from heat, strong bases, reducing agents and oxidisers, and handled with gloves, goggles and respiratory protection. Molten product must be handled in closed, heated systems. Prevent release to drains and waterways. A full MSDS is supplied with every order.
Signal word: Warning
Harmful if swallowed · may affect the blood · toxic to aquatic life with long-lasting effects
Safe-handling essentials
- Gloves, goggles and protective clothing at all times
- Dust or vapour respirator; use local exhaust ventilation
- Avoid skin contact — nitroaromatics are absorbed through the skin
- Keep packs sealed, cool and dry
- Store away from strong bases, reducing agents and oxidisers
- Never allow release to drains, soil or waterways
- Transport as a class 6.1 toxic solid — UN entry stated on the SDS
Grades
3,4-Dichloro Nitro Benzene grades & technical specifications
We supply 3,4-DCNB in standard and low-isomer grades for herbicide and pharmaceutical routes.
| Parameter | Specification |
|---|---|
| Assay (purity) | 99% min |
| Appearance | Pale yellow solid / clear yellow melt |
| 2,3-Dichloronitrobenzene | 0.5% max |
| Other isomers | 0.3% max |
| Setting point | 39 °C min |
| Moisture | 0.1% max |
| Acidity | 0.01% max |
| Product form | Solid in drums or molten |
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
HDPE or MS drums with liner, jumbo bags of solid, or molten in heated tankers as per quantity.
Minimum order quantity
Flexible — single drums or bags for trials through to full-container loads.
Shelf life
Long shelf life in sealed, unopened packs stored cool and dry; molten storage needs controlled heating.
Dispatch
Pan-India dispatch and worldwide export with complete dangerous-goods documentation and logistics support.
Why buy from us
Why choose Chelora as your 3,4-DCNB supplier?
As an established 3,4-Dichloro Nitro 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 and process fit from a team that knows nitroaromatic intermediates.
One point of contact
Source 3,4-DCNB alongside your other intermediates — one enquiry, one team, one invoice.
Ordering
How to order 3,4-Dichloro Nitro 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
3,4-Dichloro Nitro 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); aquatic chronic cat. 2 — further classifications on the SDS |
| Signal word | Warning |
| First aid — inhalation | Move to fresh air; seek medical help. Watch for signs of methaemoglobinaemia (blue lips or nails) |
| 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 dust, vapour and skin contact; ventilate |
| Storage | Cool, dry, sealed; away from heat, bases, reducing agents & oxidisers |
| Environment | Toxic to aquatic life; prevent release to drains / waterways |
| Transport | Class 6.1 toxic solid; typically UN 2811 — confirm on SDS |
Certificate of Analysis (representative)
| Test parameter | Specification | Method |
|---|---|---|
| Assay (purity) | 99% min | GC |
| Appearance | Pale yellow solid | Visual |
| 2,3-Isomer | 0.5% max | GC |
| Setting point | 39 °C min | Capillary |
| Moisture | 0.1% max | Karl Fischer |
| Acidity | 0.01% max | Titration |
The actual batch COA is supplied with each shipment.
FAQ
Frequently asked questions
Common questions from buyers specifying 3,4-DCNB for herbicide, pharmaceutical and fine-chemical production.
What is 3,4-Dichloro Nitro Benzene used for?
3,4-DCNB is used mainly to make 3,4-dichloroaniline for the herbicides diuron, linuron and propanil, and to make 3-chloro-4-fluoronitrobenzene and 3-chloro-4-fluoroaniline for pharmaceutical synthesis. It is also used in dye and fine-chemical intermediates.
What is the CAS number of 3,4-DCNB?
The CAS number is 99-54-7 and the molecular formula is C6H3Cl2NO2. It is also known as 1,2-dichloro-4-nitrobenzene or 4-nitro-o-dichlorobenzene.
How is 3,4-DCNB made?
o-Dichlorobenzene is nitrated with mixed acid. The main product is 3,4-DCNB, with 2,3-DCNB as the minor isomer; the two are separated by crystallisation and distillation.
Is 3,4-Dichloro Nitro Benzene hazardous?
Yes. It is harmful if swallowed, can be absorbed through the skin, may cause methaemoglobinaemia at high exposure and is toxic to aquatic life. Handle it with proper PPE, ventilation and containment; we supply a full MSDS with every order.
What is the difference between 3,4-DCNB and 2,3-DCNB?
Both come from nitrating o-dichlorobenzene. In 3,4-DCNB the chlorines are meta and para to the nitro group, and it leads to 3,4-dichloroaniline for herbicides. In 2,3-DCNB the chlorines are ortho and meta, and it leads to 2,3-dichloroaniline for pharmaceutical intermediates.
How should 3,4-DCNB be stored?
In sealed drums or bags in a cool, dry, well-ventilated store, away from heat, strong bases, reducing agents and oxidisers. Because it melts at about 40 °C, keep solid packs out of direct sun; molten product needs closed, heated storage.
Do you provide COA and MSDS for 3,4-DCNB?
Yes, we provide a batch-specific COA and MSDS with every order, plus technical support on request.
Do you supply and export 3,4-Dichloro Nitro Benzene?
Yes, we supply 3,4-DCNB across India and export internationally with complete dangerous-goods documentation, sourced from reliable manufacturers.
Request a quote or sample
Need a reliable 3,4-DCNB supplier?
Looking for a dependable 3,4-Dichloro Nitro Benzene (3,4-DCNB) 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