Terephthaloyl chloride
- CAS No.
- 100-20-9
- Chemical Name:
- Terephthaloyl chloride
- Synonyms
- TCL;TEREPHTHALOYL DICHLORIDE;Terephtaloyl chloride;P-PHTHALOYL CHLORIDE;1,4-Benzenedicarbonyl dichloride;TEREPHTHALYL CHLORIDE;1,4-dichloroformylbenzene;TEREPHTHALIC ACID DICHLORIDE;p-PhthaL;bis(forMaldehyde)
- CBNumber:
- CB5852556
- Molecular Formula:
- C8H4Cl2O2
- Molecular Weight:
- 203.02
- MDL Number:
- MFCD00000693
- MOL File:
- 100-20-9.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Product description | Number | Pack Size | Price |
| Terephthaloyl chloride ≥99%, flakes | 120871 | 5g | $40 |
| Terephthaloyl chloride ≥99%, flakes | 120871 | 1kg | $152 |
| Terephthaloyl Chloride >99.0%(GC)(T) | T0017 | 100g | $23 |
| Terephthaloyl Chloride >99.0%(GC)(T) | T0017 | 25g | $18 |
| Terephthaloyl chloride ≥99%, flakes | 120871 | 250g | $55 |
| More product size | |||
| Melting point | 79-81 °C(lit.) |
|---|---|
| Boiling point | 266 °C(lit.) |
| Density | 1,34 g/cm3 |
| vapor density | 7 (vs air) |
| vapor pressure | 0.02 mm Hg ( 25 °C) |
| refractive index | 1.5684 (estimate) |
| Flash point | 356 °F |
| storage temp. | 2-8°C |
| solubility | ethanol: 5%, clear |
| form | flakes |
| color | White to Almost white |
| PH | <0.5 (H2O) |
| explosive limit | 1.5-8.9%(V) |
| Water Solubility | REACTS |
| Sensitive | Moisture Sensitive |
| BRN | 607796 |
| InChI | 1S/C8H4Cl2O2/c9-7(11)5-1-2-6(4-3-5)8(10)12/h1-4H |
| InChIKey | LXEJRKJRKIFVNY-UHFFFAOYSA-N |
| SMILES | ClC(=O)c1ccc(cc1)C(Cl)=O |
| Indirect Additives used in Food Contact Substances | TEREPHTHALOYL CHLORIDE |
| CAS DataBase Reference | 100-20-9(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | G247CO9608 |
| NIST Chemistry Reference | 1,4-Benzenedicarbonyl dichloride(100-20-9) |
| EPA Substance Registry System | 1,4-Benzenedicarbonyl dichloride (100-20-9) |
| UNSPSC Code | 12352101 |
| NACRES | NA.22 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS05,GHS06 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H314-H331-H335 | |||||||||
| Precautionary statements | P260-P271-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338 | |||||||||
| target organs | Respiratory system | |||||||||
| PPE | Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges | |||||||||
| Hazard Codes | C,T | |||||||||
| Risk Statements | 34-23-35 | |||||||||
| Safety Statements | 26-27-36/37/39-45-38-28B | |||||||||
| RIDADR | UN 2923 8/PG 3 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | WZ1797000 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 6.1 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29173980 | |||||||||
| Storage Class | 6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials |
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| Hazard Classifications | Acute Tox. 3 Inhalation Eye Dam. 1 Skin Corr. 1A STOT SE 3 |
|||||||||
| Hazardous Substances Data | 100-20-9(Hazardous Substances Data) | |||||||||
| Excepted Quantities | Not Permitted as Excepted Quantity | |||||||||
| NFPA 704 |
|
Terephthaloyl chloride price More Price(14)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 120871 | Terephthaloyl chloride ≥99%, flakes | 100-20-9 | 5g | $40 | 2026-04-30 | Buy |
| Sigma-Aldrich | 120871 | Terephthaloyl chloride ≥99%, flakes | 100-20-9 | 1kg | $152 | 2026-04-30 | Buy |
| TCI Chemical | T0017 | Terephthaloyl Chloride >99.0%(GC)(T) | 100-20-9 | 100g | $23 | 2026-04-30 | Buy |
| TCI Chemical | T0017 | Terephthaloyl Chloride >99.0%(GC)(T) | 100-20-9 | 25g | $18 | 2026-04-30 | Buy |
| Sigma-Aldrich | 120871 | Terephthaloyl chloride ≥99%, flakes | 100-20-9 | 250g | $55 | 2026-04-30 | Buy |
Terephthaloyl chloride Chemical Properties,Uses,Production
Chemical Properties
monoclinic crystals or white crystalline flakes. Soluble in ethanol and organic solvents.
Uses
Terephthaloyl chloride and Isophthaloyl dichloride have many similar uses as monomers for the synthesis of specialty fibers and as raw materials for polymers such as polyamides and polyesters. Dyemanufacture; synthetic fibers, resins, films; UV absorption; pharmaceuticals; rubber chemicals; cross-linking agent for polyurethanes and polysulfides.
Uses
Terephthaloyl chloride acts as a monomer with p-phenylenediamine used in the preparation of polymer viz. poly paraphenylene terephthalamide. It is an active component in performance polymers and aramid fibers, which gives flame resistance, chemical resistance, temperature stability, light weight, and very high strength. It is also used as an effective water scavenger, utilized to stabilize isocyanates and urethane prepolymers. Further, it is used in the preparation of liquid crystalline thermosets by thermal cyclotrimerization of dicyanate compounds of ring substituted bis(4-hydroxyphenyl) terepthalates. In addition to this, it is involved in the condensation reaction with difunctional alfa, μ-diaminopolystyrene to get chain-extended polystyrene containing amide bonds along the polymer backbone.
Preparation
Synthesis of terephthaloyl chloride by thionyl chloride method: terephthalic acid is mixed with thionyl chloride, refluxed at 80℃ for 10-12h, then the thionyl chloride is evaporated, and the resulting crude product is distilled under reduced pressure to obtain the finished product.
General Description
Terephthaloyl chloride undergoes condensation reaction with difunctional α,ω-diaminopolystyrene to yield chain-extended polystyrene containing amide bonds along the polymer backbone. It undergoes interfacial reaction with bovine serum albumin to form thin cross-linked films.
Hazard
Skin irritant.
Flammability and Explosibility
Non flammable
Safety Profile
Moderately toxic by ingestion. Corrosive. Combustible when exposed to heat or flame. When heated to decomposition it emits toxic fumes of Cl-. See also CHLORIDES.
Purification Methods
Crystallise the acid chloride from dry hexane. [Beilstein 9 IV 3318.]
Terephthaloyl chloride Preparation Products And Raw materials
Raw materials
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Preparation Products
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| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hangzhou MolCore BioPharmatech Co.,Ltd. | +86-057181025280; +8617767106207 | sales@molcore.com | China | 49734 | 58 |
| Hebei Yanxi Chemical Co., Ltd. | +8618531123677 | faithe@yan-xi.com | China | 5853 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-86-13131129325 +8613131129325 | sales1@chuanghaibio.com | China | 5235 | 58 |
| Capot Chemical Co.,Ltd. | +86-（0）57185586718; +8613336195806 | sales@capot.com | China | 29640 | 60 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21588 | 55 |
| Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418679 +8618949832763 | info@tnjchem.com | China | 2988 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29819 | 58 |
| SHANDONG ZHI SHANG CHEMICAL CO.LTD | +86 18953170293 | sales@sdzschem.com | China | 1497 | 58 |
| Changzhou Ansciep Chemical Co., Ltd. | +86 519 86305871 | sales@ansciepchem.com | CHINA | 4241 | 58 |
| Jinan Finer Chemical Co., Ltd | +86-531-88989536 +86-15508631887 | sales@finerchem.com | China | 2949 | 58 |
View Lastest Price from Terephthaloyl chloride manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-05-04 | Terephthaloyl chloride
100-20-9
|
US $1.00 / KG | 1KG | 99% | 1000mt/year | Jinan Finer Chemical Co., Ltd | |
 |
2026-02-25 | Terephthaloyl chloride
100-20-9
|
US $22.00 / kg | 1kg | 99% | 30tons | Hebei Dangtong Import and export Co LTD | |
 |
2025-06-20 | Terephthaloyl chloride
100-20-9
|
US $0.00 / kg | 1kg | 0.99 | 20 tons | Hebei Yanxi Chemical Co., Ltd. |
-
- Terephthaloyl chloride
100-20-9
- US $1.00 / KG
- 99%
- Jinan Finer Chemical Co., Ltd
-
- Terephthaloyl chloride
100-20-9
- US $22.00 / kg
- 99%
- Hebei Dangtong Import and export Co LTD
-
- Terephthaloyl chloride
100-20-9
- US $0.00 / kg
- 0.99
- Hebei Yanxi Chemical Co., Ltd.
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