Industrial-grade 99.9% 1,4-Dichlorobenzene CAS 106-46-7 PDCB

1,4-Dichlorobenzene (p-DCB) — Product Detail Page

1. Product Overview

1,4-Dichlorobenzene (para-dichlorobenzene, p-DCB; CAS 106-46-7) is a white crystalline aromatic compound with the characteristic pungent, mothball-like odor. Because it sublimes slowly at room temperature, it is the classic active ingredient of mothballs and deodorant blocks; because it is a difunctional aromatic, it is also a key industrial intermediate — the feedstock for polyphenylene sulfide (PPS) engineering plastics, for dye and p-aramid-fiber intermediates, and for agrochemical synthesis. One molecule spans consumer hygiene products and high-performance materials.

One compound, four core value propositions:

Moth Repellent & Space Deodorant (Core Application):

●     slow sublimation delivers long-lasting vapor for mothproofing, mildew control and toilet/space deodorant blocks;

Polyphenylene Sulfide (PPS) Engineering Plastic Intermediate:

●     monomer feedstock with sodium sulfide for high-performance PPS resin;

Dye & p-Aramid Fiber Intermediates:

●     route to 2,5-dichloronitrobenzene, p-phenylenediamine (PPD) and dye intermediates;

Agrochemical & Specialty Intermediates:

●     building block for pesticide intermediates, plus a laboratory reagent and melting-point standard.

2. Product Information (Quick Facts)

3. Chemistry & Structure

1,4-Dichlorobenzene (C₆H₄Cl₂, MW 147.00) carries two chlorine atoms in para positions on the benzene ring, giving a highly symmetric, volatile molecule with a melting . It is practically insoluble in water but soluble in common organic solvents, and it sublimes slowly at room temperature — the property that makes it effective as a vapor-phase moth repellent and deodorant, and that requires vapor management in handling and storage.

4. Key Features & Benefits

●     Slow room-temperature sublimation: long-lasting vapor phase for mothproofing and deodorizing.

●     Classic moth repellent: the active substance of the traditional mothball and camphor-block product family.

●     Difunctional aromatic core: two para reactive sites for polymer and intermediate chemistry.

●     PPS feedstock: direct monomer route to high-performance polyphenylene sulfide engineering plastics.

●     Broad intermediate value: dyes, p-aramid monomers and agrochemical building blocks from one molecule.

●     Versatile solubility: dissolves in alcohol, ether, benzene and chloroform.

●     Consistent quality: controlled assay, melting range and purity with COA.

5. Main Applications

5.1 Moth Repellent & Space Deodorant (Core Application)

p-DCB is the classic volatile active for household and institutional hygiene products:

●     Moth repellents and mothballs: protects stored clothing, woolens and furs from clothes moths and carpet beetles;

●     Mildew and mothproofing blocks: cabinets, wardrobes, storage chests and archival storage;

●     Toilet and urinal deodorant blocks: long-lasting space freshening in washrooms;

●     Air-freshener crystals: slow-release vapor for enclosed spaces.

5.2 Polyphenylene Sulfide (PPS) Engineering Plastic Intermediate

●     PPS resin feedstock: reacts with sodium sulfide to produce polyphenylene sulfide;

●     High-performance engineering plastics: PPS for automotive, electrical, electronics and chemical-resistant parts;

●     Compound and film applications: PPS compounds, coatings and films;

●     Consistent quality: controlled purity critical for reproducible PPS molecular weight.

5.3 Dye & p-Aramid Fiber Intermediates

●     2,5-Dichloronitrobenzene route: nitration product used for p-phenylenediamine (PPD) and downstream derivatives;

●     p-Aramid monomers: PPD is the key monomer of para-aramid (Kevlar-type) high-performance fibers;

●     Dye intermediates: 2,5-dichloroaniline and related building blocks for azo and disperse dyes;

●     Fine-chemical derivatives: 2,5-dichlorobenzoic acid and specialty aromatics.

5.4 Agrochemical Intermediates

●     Pesticide intermediates: building block for selective insecticide and fungicide actives;

●     Herbicide chemistry: chlorinated aromatic intermediates for crop-protection actives;

●     Plant-protection formulation chemistry: controlled-purity aromatic feedstock;

●     Regulatory note: pesticide uses follow destination-market plant-protection rules.

5.5 Laboratory Reagent & Specialty Uses

●     Melting-point standard: well-defined 52–54 °C reference for calorimetry and calibration;

●     Analytical reagent: high-purity grade for laboratory use;

●     Leather and textile preservation: mothproofing auxiliary in storage and finishing;

●     Synthesis reagent: chlorinated aromatic building block for R&D.

6. Packaging, Storage & Transport

Packaging (customizable):

●     25 kg fiber drum or PP/paper bag with PE liner; 500 kg / 1,000 kg big bags; small packs on request;

Storage:

●     Store in a cool, dry, well-ventilated area; keep containers tightly closed to limit vapor emission;

●     Separate from strong oxidizers and food/feed materials; keep away from ignition sources

●     Control workplace vapor concentration; avoid dust generation.

7. Why Choose Jinan Future Chemical Co., Ltd.?

●     Factory-direct supply: own production and sourcing capability, transparent pricing, no middleman markup;

●     Stable quality: strict internal control, every batch tested (assay, melting range, appearance), COA with every shipment;

●     Export experience: experienced in dangerous-goods (UN 3077 Class 9) documentation and compliant sea/air shipping;

8. FAQ

Q1: What is 1,4-dichlorobenzene used for?

1,4-Dichlorobenzene is used as the volatile active of moth repellents, mothballs and toilet/space deodorant blocks; as the monomer feedstock for polyphenylene sulfide (PPS) engineering plastics; as the intermediate for 2,5-dichloronitrobenzene, p-phenylenediamine (PPD) and dye intermediates (including para-aramid fiber monomers); as an agrochemical intermediate; and as a laboratory reagent and melting-point standard.

Q2: Why is p-DCB the classic mothball active?

p-DCB sublimes slowly at room temperature, releasing a steady vapor concentration inside enclosed storage (wardrobes, chests, drawers) that repels clothes moths and carpet beetles and inhibits mildew. Its vapor-phase action needs no contact or liquid handling, one charge protects for weeks to months, and the solid form is cheap and stable — which is why it has been the standard mothball chemistry for generations. Because of its toxicity profile, consumer products based on p-DCB are regulated in several markets and must be used in ventilated storage only.

Q3: How does p-DCB become PPS engineering plastic?

Polyphenylene sulfide (PPS) is produced by the polycondensation of p-dichlorobenzene with sodium sulfide in a polar solvent. The para-substitution of p-DCB provides the linear, rigid backbone that gives PPS its outstanding heat resistance, chemical resistance, dimensional stability and flame retardancy — the properties that make PPS the engineering plastic of choice for automotive, electrical/electronic and chemical-processing components.

Q4: Is 1,4-dichlorobenzene safe to handle?

1,4-Dichlorobenzene is harmful by inhalation and if swallowed, is irritating to the eyes, Handle with gloves, eye protection and adequate ventilation; control vapor concentrations and avoid dust; keep away from oxidizers and ignition sources (flash point ≈ 61 °C); keep containers closed to limit sublimation.