Terephthalaldehyde CAS 623-27-8 Aromatic Dialdehyde Intermediate
Name: Terephthalaldehyde
Cas: 623-27-8
Purity: 99%
MOQ: 1KG
Directory Guidance onTerephthalaldehyde
Chemical Structure
Terephthalaldehyde
- CAS No: 623-27-8
- English Name: Terephthalaldehyde
- Alias: 1,4-Benzenedicarboxaldehyde, TPA
- Molecular Formula: C8H6O2
- Molecular Weight: 134.13
- EINECS No: 210-784-8
- Appearance: White needle crystal or off-white crystalline powder
- Purity: ≥98% / ≥99% HPLC
- Melting Point: 114–116°C
- Boiling Point: 245–248°C
- Density: 1.189 g/cm³
- Flash Point: 76°C
- Moisture: ≤0.3%
- Industrial Grade Terephthalaldehyde (Brightener & Dye Raw Material)
- Fine Purified Grade (Pharmaceutical & Lab Synthesis)
Product Packaging
In the industrial whitening sector, Terephthalaldehyde (TPA) serves as the foundational synthon for synthesizing premium optical brighteners. Chemical formulators utilize its symmetrical dialdehyde backbone to react with amines or active methylene compounds, constructing highly conjugated molecular systems (such as stilbene derivatives). These high-efficiency whitening agents are extensively deployed in textile printing, papermaking pulp treatment, household detergents, and plastic polymer masterbatches to neutralize yellowness and boost brightness.
TPA is a critical structural block for engineering high-grade organic dyes, functional chromophores, and advanced color-fixing agents. Its rigid dual-aldehyde configuration allows for seamless molecular design, significantly upgrading the thermal stability, UV resistance, and washing fastness of the finished colorants. This makes it an invaluable raw material for premium textile dyestuffs and specialized industrial coating pigments.
Within medicinal chemistry and fine organic synthesis, the compound is heavily utilized to build complex heterocyclic drug matrices and pharmaceutical intermediates. The aldehyde groups smoothly undergo Knoevenagel condensation, multi-component reaction (MCR) cascades, and Schiff base formations. Sourcing chemists rely on this active intermediate to streamline the synthesis pathways of high-purity Active Pharmaceutical Ingredients (APIs).
As a highly reactive cross-linking agent and additive for macromolecules, the chemical optimizes the performance of engineering plastics and specialty resins. It induces a dense network during thermal curing or copolymerization, substantially improving the heat deflection temperature (HDT), surface scratch resistance, and anti-aging properties of the polymers. It is also widely used as a curing accelerator in high-strength industrial adhesives.
Beyond industrial applications, this aromatic dialdehyde serves as a vital intermediate in flavor and fragrance chemistry. Aroma chemists utilize its chemical reactivity to synthesize unique artificial musks, aromatic compounds, and daily fragrances, providing clean blending solutions for high-end cosmetics, personal care lotions, and household air care formulations.
FAQ
A1: This aromatic dialdehyde operates as a highly reactive, symmetrical building block within specialty organic synthesis. Its critical industrial pathways include the production of stilbene-based optical brighteners, advanced chromophore dyestuffs, heterocyclic pharmaceutical actives (APIs), rigid polymer cross-linkers, and artificial aroma formulations.
A3: Under proper environmental conditions, Terephthalaldehyde exhibits robust chemical stability. To prevent ambient oxidation or moisture absorption of the formyl groups, the material should be held in original sealed packaging and stored in a cool, dry, and well-ventilated warehouse facility, away from strong oxidizing agents.
A4: We provide free-of-charge evaluation samples to qualified R&D centers and sourcing teams for bench testing. The manufacturing company covers the material cost, while the purchasing party is simply requested to coordinate or cover the international air freight courier fees.
A5: Our standard commercial distribution starts at a minimum order threshold of 25kg, typically packed in durable fiber drums with double PE inner liners. Drawing from our stable factory warehouse buffer, complete cargo lots complete export customs clearance and dispatch within 7 to 10 business days following deposit confirmation.
Related References
Manufacturer of Terephthalaldehyde
1. For products ≤50kg, we recommend using express delivery, which is usually called DDU service (discounted, convenient).
2. For products ≤500kg, we generally recommend air freight, which is usually called FOB, CFR or CIF service (fast and efficient).
3. For products >500kg, we generally recommend shipping by sea, which is usually called FOB, CFR or CIF service (economical, safe).
4. For high-value products, please choose air or express to ensure the safety of product transportation.
