Dimethyl terephthalate
Dimethyl terephthalate (CAS: 120-61-6), a white crystalline solid with the molecular formula C10H10O4 and a molecular weight of 194.18 g/mol, is a diester of terephthalic acid. It serves as a crucial building block in chemical synthesis, primarily utilised in the production of polyesters and copolymers. Its applications extend to the creation of advanced materials through transesterification reactions and copolymerisation processes.
- Synonyms
- 4-(CO2CH3)2Dimethyl 1,4-benzenedicarboxylateDMT
Polyester Synthesis
Dimethyl terephthalate is used in the synthesis of silicone aromatic polyesters via transesterification reactions with hydroxyl-terminated poly(dimethylsiloxane).
Copolymer Production
It acts as a monomer in the creation of multiblock copolymers, for instance, those composed of polyisobutylene, dimethyl terephthalate, and 1,4-butanediol.
Organic Synthesis Intermediate
As a key organic building block, it is employed in various chemical synthesis pathways, contributing to the development of diverse organic compounds.
| Molecular weight | 194.18 |
|---|---|
| Linear formula | C6H4-1,4-(CO2CH3)2 |
| Assay | ≥99.0% (GC) |
| Grade | ReagentPlus® |
| Vapour pressure | 1.15 mmHg (93 °C) |
| Vapour density | 1.04 (vs air) |
| Autoignition temp | 1058 °F |
| Melting point | 139-141 °C(lit.)140-142 °C |
| Application | Dimethyl terephthalate was used to synthesize silicone aromatic polyesters by the transesterification reaction with α,ω-bis(hydroxyalkyl)-terminated poly(dimethylsiloxane) in toluene1. It was used in the synthesis of multiblock copolymers consisting of polyiso-butylene, dimethyl terephthalate and 1,4-butanediol2. |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Flash point | 151 °C / 303.8 °F |
| Water hazard class (WGK, DE) | 1 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Dimethyl terephthalate used for?
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Dimethyl terephthalate is primarily used as a building block in chemical synthesis, particularly for producing polyesters and copolymers through reactions like transesterification.
What is the CAS number and formula for Dimethyl terephthalate?
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The CAS number is 120-61-6, and its linear formula is C6H4-1,4-(CO2CH3)2, with a molecular weight of 194.18 g/mol.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Dimethyl terephthalate in ReagentPlus® grade with an assay of ≥99.0% (GC). TSS does not represent this product as USP, BP, or EP grade.
What are the safety and handling precautions for Dimethyl terephthalate?
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Handling Dimethyl terephthalate requires appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended. It has a flash point of 151 °C (303.8 °F) and an autoignition temperature of 1058 °F.
How is Dimethyl terephthalate shipped and exported?
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As a specialist global supplier and exporter since 1998, Tech Serve Solutions ensures compliance with all regulations for the safe and efficient shipment and export of chemical products like Dimethyl terephthalate worldwide.
How can I request a sample or quote for Dimethyl terephthalate?
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To request a sample or a quote for Dimethyl terephthalate, please contact the Tech Serve Solutions sales team through our website or by phone.
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