CAS 88-73-3 · Ortho Nitro Chloro Benzene

Ortho Nitro Chloro Benzene: direct from source to Europe

Ortho Nitro Chloro Benzene (ONCB, CAS 88-73-3) is the ortho isomer of chloronitrobenzene. It is used for o-chloroaniline, o-nitroanisole and o-anisidine, and in the dye, pigment, agrochemical and rubber chemical industries.

  • COA, SDS & TDS with every batch
  • REACH status confirmed before quote
  • Samples available for qualification
Purityup to 99.5%+GC purity, premium grade
Lead time3 – 6 weeksOrigin to European port
FormLow-melting solid25 kg bags to bulk
Response1 business dayQuotation after receiving your spec
Product identification

Ortho Nitro Chloro Benzene: names, synonyms and identifiers

Buyers search for this material under several names. Whichever one appears on your specification, purchase order or REACH dossier, it is the same compound: Ortho Nitro Chloro Benzene, CAS 88-73-3.

  • Confirmed CAS number on every COA
  • Premium grade with GC purity 99.5%+ available
  • TDS and SDS supplied with every shipment
Common name
Ortho Nitro Chloro Benzene
Synonyms
2-Chloronitrobenzene · ONCB · o-Nitrochlorobenzene · 1-Chloro-2-nitrobenzene
CAS number
88-73-3
Formula / MW
C6H4ClNO2  /  157.55 g/mol
Chemical family
Chloronitrobenzene
HS code
2904 (halogenated nitro derivatives). Confirm the full code with your broker.

⚠ Not the same as para (100-00-5) or meta (121-73-3) chloronitrobenzene. Always match the CAS number.

Technical data

Ortho Nitro Chloro Benzene physical and chemical properties

Key parameters for process engineering, safety planning and storage design. Values are typical; always verify against the current TDS for your lot.

Appearance
Yellow crystalline solid or yellow melt
Yellow crystalline solid or yellow melt
Melting point
32–33 °C
Typical value
Boiling point
As per TDS
Supplied with each order
Molecular weight
157.55
g/mol
Molecular formula
C6H4ClNO2
Chloronitrobenzene
Solubility
Low in water
Soluble in common organic solvents
Physical form
Low-melting solid
At room temperature
Storage
Cool & dry
Closed container, away from light
Quality & specification

Ortho Nitro Chloro Benzene grade specifications: standard vs premium

Two grades are offered so your process chemist or quality team can pick what suits downstream requirements. COA parameters are confirmed before every shipment.

Parameter
Standard grade
Premium grade
Test method / note
GC purity
≥ 99.0%
≥ 99.5%
GC area %
Water content (KF)
≤ 0.2%
≤ 0.1%
Karl Fischer titration
Total impurities
≤ 0.8%
≤ 0.4%
By GC; individual limits on request
Isomer identity
Confirmed
Confirmed
GC or GC-MS
Appearance
Yellow crystalline solid or yellow melt
Yellow crystalline solid or yellow melt
Visual check

All values are specification limits, not guaranteed minima. Actual COA figures for your lot are provided before dispatch. Non-standard specifications are available on enquiry.

Applications

Where Ortho Nitro Chloro Benzene is used

Typical end uses and synthesis routes for European manufacturers, toll processors and laboratories.

o-Chloroaniline

Reduction gives o-chloroaniline, a feed for pigments and agrochemicals.

o-Anisidine and o-nitroanisole

Methoxylation route to o-anisidine, a pigment and dye intermediate.

Azo pigments

Starting point for ortho-substituted amine coupling components.

Rubber and agro chemicals

Intermediate for additives and crop-protection actives.

Pharma building block

Ortho nitro/chloro pattern for heterocycle-forming steps.

Packaging & logistics

Packed to your site, documented for customs

Ortho Nitro Chloro Benzene is handled as a dangerous good. Every shipment leaves with UN-approved packaging, CLP labelling and the full document set for European import.

Bags

25 kg bags

UN-approved bags or lined fibre packs on pallets, suitable for FCL and LCL.

25 kg net
Drums

200 kg drums

UN-approved steel or fibre drums for higher volume users.

200 kg net
Bulk

Jumbo bags / heated bulk

Bulk bags, or heated bulk supply on request for suitable receiving sites.

On request
Document set included: Bill of lading · Commercial invoice · Packing list · Certificate of analysis (COA) · Safety data sheet (SDS) · Dangerous goods declaration (IMDG/ADR) · Certificate of origin · Other certificates on request
Common questions

Ortho Nitro Chloro Benzene: frequently asked questions

Quick answers for European buyers. For anything else, email source@cheloragroup.com.

It is also sold as 2-Chloronitrobenzene, ONCB, o-Nitrochlorobenzene, 1-Chloro-2-nitrobenzene. All refer to CAS 88-73-3. Confirm the CAS number with any supplier before ordering.

Price depends on grade, volume, packing, Incoterm and destination port, and moves with raw material markets. Send us your requirement and we will quote in EUR or USD with a landed-cost breakdown, usually within one business day.

Ortho Nitro Chloro Benzene is the ortho isomer of chloronitrobenzene.

Standard grade offers 99.0% minimum GC purity. Premium grade offers 99.5% minimum, lower water content and inert-gas blanketed packaging. Premium is recommended for multi-step routes with tight impurity control.

It melts around 32 °C, so it may arrive as solid, partially molten or fully molten in warm transit. Warm gently and homogenise before sampling or charging.

Nitration of chlorobenzene gives both isomers, and the split, separation cost and market demand for each set the relative prices. Ask for both when comparing.

Store in closed containers in a cool, dry, ventilated place, away from strong bases and reducing agents. Use within the shelf life stated on the COA and TDS.

It is treated as a dangerous good (class and UN number per SDS; always confirm on the current SDS). We pack it in UN-approved containers, apply CLP labels and ship through licensed forwarders under IMDG for sea and ADR for European road.

Yes. Laboratory and pilot samples are supplied with a COA and SDS so your team can qualify the grade. Mention sample needs in your enquiry.

REACH status is confirmed before we quote. We advise on importer-of-record arrangements and whether the substance is registered for your use. Send your use descriptor and we will confirm.

Ready to source?

Get your Ortho Nitro Chloro Benzene quotation today

Send us the grade, volume, destination and Incoterm. You will receive a clear price, packaging options and a full document checklist, usually within one business day.

  • Samples to full containers
  • COA, SDS and DG documents included as standard
  • Quote in EUR or USD, your choice of Incoterm