Mono Chloro Benzene Chlorobenzene (MCB) · CAS 108-90-7
Chelora Chemicals is a supplier of Mono Chloro Benzene, the single-chlorine substituted benzene used as the key raw material for nitrochlorobenzene production and as a solvent across dye, agrochemical and pharmaceutical manufacturing. Every consignment leaves with a batch-specific COA and the current SDS.
Also known as: MCB, Chlorobenzene, Phenyl Chloride, Benzene Chloride, Chlorobenzol
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Price, lead time and a sample COA for Mono Chloro Benzene, usually within one working day. We ship worldwide.
Request a Quote Email the DeskDocumentation
- Batch-specific COA (assay, water content, colour)
- Safety Data Sheet (SDS)
- UN 1134 dangerous-goods transport documents
- Third-party inspection on request
- Certificate of origin
What is Mono Chloro Benzene?
Mono Chloro Benzene (MCB) is a benzene ring carrying a single chlorine substituent, formula C₆H₅Cl. It is supplied as a clear, colourless, mobile liquid with a characteristic almond-like aromatic odour.
Its value as a raw material comes from the chlorine atom being a reactive handle for further nitration and substitution chemistry, while the aromatic ring itself makes it an effective solvent for resins, oils, rubber, paints and pesticides. It is the starting point for ortho- and para-nitrochlorobenzene (ONCB/PNCB), which in turn feed a wide range of downstream dye, rubber-chemical and agrochemical intermediates.
Commercially it is produced by the catalytic chlorination of benzene, typically in the presence of a Lewis-acid catalyst such as ferric chloride or aluminium chloride, with dichlorobenzene isomers forming as co-products.
Handling follows standard precautions for a flammable chlorinated aromatic solvent — chemical-resistant gloves and eye protection, adequate ventilation, and storage away from heat, open flame and strong oxidisers. It is also harmful to aquatic life and should be kept out of drains and waterways.
Why Mono Chloro Benzene specifically
- A single, reactive chlorine. The one chlorine on the ring gives a clean handle for nitration, making MCB the standard feedstock for nitrochlorobenzene production.
- Dye and agro intermediate. Used as the starting material for a wide family of dye, rubber-chemical and pesticide intermediates built from nitrochlorobenzene.
- Versatile solvent. An effective solvent for resins, waxes, oils, paints, adhesives and pharmaceutical processes.
- Distinct from dichlorobenzenes. MCB's reactivity and solvency differ from ortho- and para-dichlorobenzene, and the two are not interchangeable where a mono-substituted feedstock is specified.
How Mono Chloro Benzene is Manufactured
Mono Chloro Benzene is produced by the direct chlorination of benzene, most commonly using a Lewis-acid catalyst at modern plants.
- Catalytic chlorination. Benzene is reacted with chlorine gas in the presence of a catalyst such as ferric chloride, under controlled temperature.
- Workup. The crude reaction mass is separated from catalyst residues and unreacted chlorine.
- Distillation. MCB is separated from ortho- and para-dichlorobenzene co-products and unreacted benzene by fractional distillation.
- Quality release and packing. Assay, water content and colour are confirmed against specification before the batch is packed and released.
Typical Commercial Specification
Figures below are representative of commercial-grade Mono Chloro Benzene. Tell us your downstream route and the grade you need, and we will advise on the specification to order against.
| Parameter | Typical Value |
|---|---|
| Appearance | Clear, colourless liquid |
| Chlorobenzene content | 99.5% min by GC assay |
| Dichlorobenzene isomers | Trace levels to grade |
| Water content | Low ppm range; reported on the COA |
| Colour | APHA, to grade |
Physical & Chemical Properties
| Property | Value |
|---|---|
| Chemical formula | C₆H₅Cl |
| Molecular weight | 112.56 g/mol |
| Appearance | Clear, colourless liquid |
| Melting point | About -45 °C |
| Boiling point | About 132 °C |
| Density | About 1.11 g/mL (20 °C) |
| Flash point | About 28 °C (closed cup) |
| Solubility in water | Low, about 0.05% at 20 °C |
| Incompatibilities | Strong oxidisers, heat and ignition sources |
Behaviour in the process
MCB's reactivity and solvency are what dye, agro and pharma intermediate producers are buying:
- Electrophilic substitution. The ring undergoes nitration to give ortho- and para-nitrochlorobenzene, the key downstream intermediates.
- Solvency. Dissolves resins, oils, waxes, rubber and many organic compounds, making it useful as a reaction and extraction solvent.
- Flammability. A Class 3 flammable liquid with a flash point around 28 °C; handle away from ignition sources.
Mono Chloro Benzene and Related Chlorobenzenes
Choosing between chlorinated benzenes comes down to the number and position of chlorine atoms the target synthesis or solvent application needs.
| Material | Substitution | When it is the right choice |
|---|---|---|
| Mono Chloro Benzene | 1-Cl | Routes needing a single, reactive chlorine — nitrochlorobenzene feedstock, general solvent use |
| ortho-Dichlorobenzene | 1,2-diCl | Routes or solvent uses needing two adjacent chlorines |
| para-Dichlorobenzene | 1,4-diCl | Routes needing two chlorines symmetrically placed, or a solid sublimable product |
| meta-Chloroaniline | 3-Cl, 1-NH₂ | Routes already needing an amine group alongside the chlorine, rather than building it from MCB |
Stated plainly: a route built around a mono-substituted chlorobenzene feedstock needs this specific material — the di- and tri-chlorinated analogues have different reactivity and are not drop-in substitutes.
Industries We Supply Mono Chloro Benzene To
The same chlorobenzene feeds a dye-intermediate manufacturer, an agrochemical producer and a paints/resins formulator. What changes is the downstream chemistry and the documentation each requires.
Where Mono Chloro Benzene is Used
In downstream functionalisation
MCB's ring chlorine is carried through nitration and further substitution chemistry to build the target dye, agro or pharma intermediate. Its single-chlorine substitution gives reactivity distinct from the dichlorobenzenes, which is often exactly why a route is designed around this feedstock specifically.
Need a specific purity grade?
Tell us the purity grade you need, your downstream chemistry or solvent use, the packing format you can receive and the annual quantity. We will come back with a price, a lead time and a sample COA.
Quality Control & Testing
Every lot is released against a batch-specific Certificate of Analysis, with dichlorobenzene isomer content reported alongside the main assay because carryover affects downstream nitration selectivity and yield.
- Chlorobenzene content — by GC assay, the primary grade measure.
- Dichlorobenzene isomers — reported because carryover affects downstream nitration chemistry.
- Water content and colour — reported because both affect solvent-grade and reaction performance.
Common Process Problems & Likely Causes
| Symptom | Likely cause | What to check |
|---|---|---|
| Lower nitration yield or off-ratio ONCB/PNCB | Dichlorobenzene isomer carryover | Isomer breakdown on the COA |
| Hazy or discoloured material on receipt | Moisture ingress or colour-grade impurities | Water content and APHA colour figure |
| Lower-than-expected solvency | Assay below specification or contamination | GC assay figure on the COA |
Packaging, Storage & Shipping
- Standard packing. Mild-steel or lined drums, typically 170 – 225 kg net, with ISO tank and flexi-bag bulk formats on contract supply.
- Flammability precautions. Store away from heat, sparks, open flame and direct sunlight; bond and ground containers during transfer.
- Temperature control. Store in a cool, dry, well-ventilated area; keep containers tightly sealed to limit moisture pickup and evaporative loss.
- Material compatibility. Avoid contact with strong oxidisers and incompatible metals that may react with chlorinated solvents.
- Transport classification. Commonly shipped under UN 1134 (Chlorobenzene), Class 3, Packing Group III — confirm the correct entry and packing group against your own current SDS before shipping.
Hazards & Safe Handling
Mono Chloro Benzene is a flammable liquid, harmful if swallowed, and causes skin and eye irritation. It may cause drowsiness or dizziness and is harmful to aquatic life with long-lasting effects. Standard precautions for a flammable aromatic solvent and good laboratory and plant practice apply throughout handling.
- Skin and eye contact. Chemical-resistant gloves and goggles are standard practice; rinse thoroughly with water on contact.
- Inhalation. Use adequate ventilation or local exhaust when handling, given the material's volatility and narcotic effects at high concentration.
- Fire and ignition. Keep away from heat, sparks, open flames and hot surfaces; bond and ground equipment during transfer to control static discharge.
- PPE. Chemical-resistant gloves, safety goggles and, where vapour exposure is a concern, a suitable respirator.
- Environment. Harmful to aquatic life with long-lasting effects; avoid uncontrolled release to water and follow local effluent rules.
Regulatory & Compliance Notes
Mono Chloro Benzene is a long-established, widely registered industrial solvent and intermediate. Because obligations differ by territory and use, the notes below are orientation rather than legal advice.
- GHS classification. Classified as a flammable liquid, harmful if swallowed, causing skin and eye irritation, with aspiration and aquatic-toxicity hazards (Signal word: Danger); the SDS carries the full hazard statements for your grade.
- REACH and chemical inventories. Registered under EU REACH and listed on major chemical inventories.
- Dangerous goods transport. Commonly shipped under UN 1134 (Chlorobenzene), Class 3, Packing Group III. Confirm the correct entry and packing group with your logistics/EHS team against your current SDS before shipping.
- HS code. Commonly declared under the halogenated hydrocarbon derivatives heading; confirm the exact tariff line with your customs broker for your jurisdiction.
We Supply Mono Chloro Benzene Worldwide
Chelora Chemicals is a supplier and export partner, not a single-plant trader. We ship Mono Chloro Benzene from India and from partner sources to customers across Asia, Europe, the Middle East, Africa, and North and South America, handling the export documentation and freight so the material arrives ready to use.
- Incoterms. EXW, FOB, CIF, CFR and DAP quoted to suit your purchasing terms and freight arrangements.
- Ports. Regular shipments through Nhava Sheva (JNPT) and Mundra, with other ports arranged as routing allows.
- Documentation. Commercial invoice, packing list, certificate of origin, COA and SDS issued as a complete set.
- Flexible volumes. From drum quantities up to ISO-tank and flexitank bulk shipments on a supply contract.
Buying Mono Chloro Benzene from Chelora
We are an independent sourcing and supply partner. For this product that means settling three things at enquiry: the purity grade your application needs, the packing format, and the quantity you are buying.
- Documentation on every lot. Batch-specific COA with assay and isomer breakdown, plus the current SDS.
- Analysis before commitment. Representative analysis shared ahead of a commercial order so your lab can qualify the material.
- Quantities. Drum quantities through to ISO-tank and flexitank bulk shipments on contract supply.
- Inspection. Independent third-party inspection available at loading when the contract requires it.
- Related chlorobenzenes. ortho- and para-Dichlorobenzene and related chlorinated aromatics alongside this product from one supplier.
How ordering works
- Send the enquiry. Purity grade, quantity, destination port and the Incoterm you buy on.
- We quote. Price, lead time, packing format and a sample COA, normally within one working day.
- Qualify the supply. For first orders or dye/pharma-grade applications, we share the analysis so your technical team can sign off before you commit.
- Confirm the order. Proforma invoice issued; payment terms agreed against the volume and the relationship.
- Ship and document. Packed, labelled and loaded with the full export document set, and tracked through to arrival.
Mono Chloro Benzene — Common Questions
The questions our technical desk is asked most often about Mono Chloro Benzene. If yours isn't here, call or email and you will reach someone who knows the chemistry.
What is the CAS number of Mono Chloro Benzene?
The CAS number for Mono Chloro Benzene (Chlorobenzene) is 108-90-7, and its EC number is 203-628-5. Its molecular formula is C₆H₅Cl with a molecular weight of 112.56 g/mol.
What is Mono Chloro Benzene used for?
It is used mainly as the raw material for nitrochlorobenzene production, which feeds dye, rubber-chemical and agrochemical intermediates, and as a solvent for resins, paints, adhesives and certain pharmaceutical processes.
Do you supply Mono Chloro Benzene worldwide?
Yes. Chelora Chemicals supplies and exports Mono Chloro Benzene worldwide — across Asia Pacific, Europe, the Middle East, Africa and the Americas, as well as throughout India. Every consignment carries the COA and SDS.
How does it differ from dichlorobenzene?
MCB carries a single chlorine on the ring, while ortho- and para-dichlorobenzene carry two. This changes the reactivity, boiling point and solvency, so the isomers are not interchangeable in most syntheses.
How is Mono Chloro Benzene manufactured?
By the catalytic chlorination of benzene, typically using a Lewis-acid catalyst such as ferric chloride, followed by fractional distillation to separate it from dichlorobenzene co-products.
Is Mono Chloro Benzene hazardous?
It is a flammable liquid, harmful if swallowed, causes skin and eye irritation, and is harmful to aquatic life. Refer to the current SDS for your grade for the complete hazard classification.
What is the UN number and transport classification?
Mono Chloro Benzene is commonly shipped under UN 1134, Class 3 (Flammable Liquid), Packing Group III. Confirm the correct entry and packing group against your own current SDS before relying on it for shipping documentation.
What are the melting point, boiling point and density?
Typical figures are a melting point around -45 °C, a boiling point around 132 °C, and a density around 1.11 g/mL. Confirm against your own supplier's COA for batch-specific figures.
How should Mono Chloro Benzene be stored?
In sealed containers, cool, dry and well away from heat, sparks, open flame and direct sunlight, given its flash point around 28 °C. Bond and ground equipment during transfer to avoid static ignition.
What purity grades do you offer?
Standard commercial grade is 99.5% minimum by GC assay, with dichlorobenzene isomer content, water content and colour reported on the COA.
What packing sizes and order quantities are available?
Mild-steel or lined drums, typically 170–225 kg net, with ISO tank and flexi-bag bulk formats available on contract supply. Orders run from drum quantities up to repeat bulk loads.
Ready to source Mono Chloro Benzene?
Send us your purity requirement and annual volume. You will get a price, a realistic lead time and a sample COA from someone who understands what the material has to do in your process — delivered anywhere in the world.