What is 1,2-Dichlorobenzene CAS 95-50-1?

1,2-Dichlorobenzene, also called orthodichlorobenzene or ODCB, is a chlorinated aromatic hydrocarbon with CAS 95-50-1, EINECS 202-425-9 and molecular formula C₆H₄Cl₂. It is a colorless to pale yellow liquid with an aromatic odor.

What is 1,2-Dichlorobenzene used for?

It is used as a high-boiling solvent for waxes, gums, resins, tars, rubbers, oils and asphalt. It is also used in heavy-duty degreasing, metal cleaning, carbon removal and as an intermediate in agrochemical, pharmaceutical and dye synthesis.

Is 1,2-Dichlorobenzene the same as orthodichlorobenzene or ODCB?

Yes. Orthodichlorobenzene, ODCB and o-dichlorobenzene are common synonyms for 1,2-Dichlorobenzene CAS 95-50-1. The name describes the ortho position of the two chlorine atoms on the benzene ring.

How does 1,2-Dichlorobenzene differ from the other dichlorobenzene isomers?

The three dichlorobenzene isomers differ in chlorine positions: 1,2- is the ortho isomer, 1,3- is meta and 1,4- is para. For industrial-grade 1,2-Dichlorobenzene, isomeric purity matters because the other isomers can affect solvent performance and downstream synthesis.

How should 1,2-Dichlorobenzene be stored and handled?

Store it in tightly closed containers in a cool, dry, ventilated area away from heat, sparks and strong oxidizers. Use appropriate ventilation and liquid-chemical PPE, and control vapors during transfer and cleaning applications.

1,2-Dichlorobenzene CAS 95-50-1

1,2-Dichlorobenzene (ODCB, ortho-dichlorobenzene), CAS 95-50-1, is a high-boiling chlorinated solvent used for waxes, resins, tars, rubbers and oils, heavy-duty degreasing and metal cleaning, and as an intermediate in agrochemical, pharmaceutical and dye synthesis. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 95-50-1
Synonyms: Orthodichlorobenzene, ODCB, o-Dichlorobenzene, 1,2-Dichlorobenzol, o-Phenylene dichloride
Einecs: 202-425-9
Molecular Formula: C₆H₄Cl₂
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packing

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Product Description

1,2-Dichlorobenzene, CAS 95-50-1, is ortho-dichlorobenzene (ODCB), a chlorinated aromatic hydrocarbon; the EC/EINECS number is 202-425-9.

Synonyms: Orthodichlorobenzene; ODCB; o-Dichlorobenzene; 1,2-Dichlorobenzol.

CAS: 95-50-1.

Molecular formula: C₆H₄Cl₂.

Molecular weight: 147.00.

EC number: 202-425-9.

It is a colorless to pale-yellow liquid with an aromatic odor; the melting point is about -17.5 °C, the boiling point about 180.4 °C and the density about 1.30 g/cm³.

It is practically insoluble in water and miscible with most organic solvents.

It is produced by chlorination of benzene or monochlorobenzene.

It is used as a high-boiling solvent for waxes, gums, resins, tars, rubbers, oils and asphalt.

It is used in heavy-duty degreasing, metal cleaning and carbon removal.

It is used as an intermediate in agrochemical, pharmaceutical and dye synthesis, such as 3,4-dichloroaniline and o-phenylenediamine.

The dichlorobenzene isomers differ in chlorine positions: 1,2- is ortho, 1,3- is meta and 1,4- is para; confirm the isomeric purity for the intended application.

Confirm assay, isomeric purity, water, color and acidity.

Store in tightly closed containers in a cool, dry, ventilated area away from heat, sparks and strong oxidizers; use ventilation and suitable PPE.

Confirm the current product-specific specification.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA, or other product-specific files.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended use, required specification, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is 1,2-Dichlorobenzene CAS 95-50-1?

A: 1,2-Dichlorobenzene, also called orthodichlorobenzene or ODCB, is a chlorinated aromatic hydrocarbon with CAS 95-50-1, EINECS 202-425-9 and molecular formula C₆H₄Cl₂. It is a colorless to pale yellow liquid with an aromatic odor.
Q:
What is 1,2-Dichlorobenzene used for?

A: It is used as a high-boiling solvent for waxes, gums, resins, tars, rubbers, oils and asphalt. It is also used in heavy-duty degreasing, metal cleaning, carbon removal and as an intermediate in agrochemical, pharmaceutical and dye synthesis.
Q:
Is 1,2-Dichlorobenzene the same as orthodichlorobenzene or ODCB?

A: Yes. Orthodichlorobenzene, ODCB and o-dichlorobenzene are common synonyms for 1,2-Dichlorobenzene CAS 95-50-1. The name describes the ortho position of the two chlorine atoms on the benzene ring.
Q:
How does 1,2-Dichlorobenzene differ from the other dichlorobenzene isomers?

A: The three dichlorobenzene isomers differ in chlorine positions: 1,2- is the ortho isomer, 1,3- is meta and 1,4- is para. For industrial-grade 1,2-Dichlorobenzene, isomeric purity matters because the other isomers can affect solvent performance and downstream synthesis.
Q:
How should 1,2-Dichlorobenzene be stored and handled?

A: Store it in tightly closed containers in a cool, dry, ventilated area away from heat, sparks and strong oxidizers. Use appropriate ventilation and liquid-chemical PPE, and control vapors during transfer and cleaning applications.

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