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Terephthaloyl chloride

Terephthaloyl chloride

CAS Number: 100-20-9

Molecular Formula: C8H4Cl2O2

Acylating reagent agrochemicalCAS 100-20-9 wholesaleHigh purity TCL aramidsUN 3261

About Terephthaloyl chloride

Terephthaloyl Chloride (CAS 100-20-9), also known as 1,4-Benzenedicarbonyl chloride, is a high-performance diacid chloride. In Elemental Derivatives hierarchy, it serves as a critical "Bifunctional Acylating Agent." TCL's symmetric, para-substituted aromatic structure allows for the creation of exceptionally rigid and ...

Synonyms

  • 1,4-benzenedicarbonyl dichloride
  • 1,4-phthaloyl dichloride
  • p-phthaloyl dichloride
  • terephthaloyl chloride
  • terephthaloyl dichloride
View all

Terephthaloyl chloride Specifications

CAS Number
100-20-9
Molecular Formula
C8H4Cl2O2
Molecular Weight
203.02
IUPAC Name
benzene-1,4-dicarbonyl chloride
Canonical SMILES
C1=CC(=CC=C1C(=O)Cl)C(=O)Cl
InChI Key
LXEJRKJRKIFVNY-UHFFFAOYSA-N
InChI
1S/C8H4Cl2O2/c9-7(11)5-1-2-6(4-3-5)8(10)12/h1-4H
EINECS Number
202-829-5
MDL Number
MFCD00000693
HSN No
291739
Melting point
82-84 °C
Boiling point
259 °C
Density
1.32 g/cm³
logP
0.88 (calculated)
Molecular Weight
203.02
Physical Hazards
Corrosive to Metals (Cat 1)
Health Hazards
Skin Corrosion (Cat 1B); Serious Eye Damage (Cat 1); STOT SE (Cat3) (Respiratory Irritation)
Precautionary Statement Codes
P260, P261, P264, P271, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P403+P233, P405, and P501

Agrochemicals: High-Performance Active Ingredients

Coupling agent for synthesising complex Aromatic Herbicides and Fungicides. The para-linkage provided by TCL is essential for the molecular docking of certain agro-actives into plant enzyme sites

Polymers: Engineering Plastics & Fibers

Primary monomer for Poly-p-phenylene terephthalamide (Aramid fibers). It is reacted with p-phenylenediamine to produce fibers with extreme tensile strength and heat resistance used in protective gear and aerospace

Pharmaceuticals: Drug Scaffolds

Synthesis of specialised drug delivery systems and cross-linked pharmaceutical polymers. It acts as a bridge for creating multi-functionalised aromatic drug precursors.

Atmospheric Shielding

Storage under a Dry Nitrogen Blanket is mandatory to prevent moisture-induced degradation and pressure buildup from HCl gas release

Temperature Requirements

Store in a cool, dry area (< 30°C). If supplied as a fused solid, heating for discharge must be controlled to prevent thermal decomposition

Containment

Use moisture-proof, polyethylene-lined steel drums or specialized ISO tanks for bulk liquid (molten) transport

Incompatibilities

Keep away from water, alcohols, strong bases, and amines (with which it reacts violently to form polyamides)

  1. 1,4-benzenedicarbonyl dichloride
  2. 1,4-phthaloyl dichloride
  3. p-phthaloyl dichloride
  4. terephthaloyl chloride
  5. terephthaloyl dichloride

Terephthaloyl chloride FAQs

Minimum Order Quantity

25 kg (pilot) · 1 MT (commercial)

Lead Time

3 – 5 weeks ex-works

Incoterms

FOB · CIF

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

Regional Availability

India · EU · Middle East · Southeast Asia

Documentation

SDS · COA · TDS available on request

Compliance & Quality

REACH registered*

GHS/SDS available

ISO 9001:2015 site*

RoHS compliant*

Global sourcing network

Consistent quality & reliability

End-to-end technical support

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