1,4-Naphthalenedicarboxylic Acid 605-70-9 | KCB Acid
Product Information
| Item | Details |
|---|---|
| Product Name | 1,4-Naphthalenedicarboxylic Acid |
| CAS Number | 605-70-9 |
| Other Names | Naphthalene-1,4-dicarboxylic Acid; 1,4-Naphthalic Acid; KCB Acid |
| Molecular Formula | C12H8O4 |
| Molecular Weight | 216.19 g/mol |
| EC Number | 210-094-7 |
| MDL Number | MFCD00014312 |
| Chemical Category | Aromatic Dicarboxylic Acid |
| Physical Form | Solid, powder to crystalline form |
| Melting Point | >300°C (literature value) |
| Water Solubility | Insoluble in water |
Technical Specifications
The following commercial-grade specification is available as a reference for industrial enquiries.
| Parameter | Commercial Grade Reference |
|---|---|
| Appearance | White to yellow powder or crystals |
| Purity | ≥98.0% (HPLC) |
| Moisture | ≤0.5% |
| Physical Form | Solid |
| Standard Packing | 25 kg/fiber drum |
Specifications are subject to the grade quoted and the applicable batch documentation.
Industrial Applications
1. Fluorescent Brightener KCB Production
1,4-Naphthalenedicarboxylic Acid is used as an intermediate in the synthesis of fluorescent whitening agents, including routes to Fluorescent Brightener KCB (CAS 5089-22-5).
KCB is a separate finished chemical commonly associated with optical brightening applications in plastics and synthetic materials. CAS 605-70-9 identifies the upstream dicarboxylic acid intermediate rather than the finished brightener.
For intermediate production, the required assay, moisture content and impurity profile depend on the selected synthesis route and product specifications.
2. Dye and Color Chemical Intermediates
The aromatic ring structure and two carboxylic acid groups make 1,4-Naphthalenedicarboxylic Acid useful as a building block in selected dye-intermediate synthesis routes.
Applications include the preparation of downstream organic compounds used in specialty color chemicals.
Material specifications for these processes may include purity, moisture and additional impurity limits, depending on the final chemical product and reaction route.
3. Specialty Copolyester Materials
1,4-Naphthalenedicarboxylic Acid can be used in selected specialty copolyester synthesis systems. Its rigid aromatic structure has been investigated as a modifying component in isosorbide-based copolyesters.
The 1,4-isomer is chemically distinct from 2,6-Naphthalenedicarboxylic Acid (CAS 1141-38-4), the conventional precursor associated with commercial polyethylene naphthalate (PEN).
For polymer production, the acid isomer, monomer purity and reaction requirements must match the intended polymer composition.
4. Coordination and Advanced Materials
1,4-Naphthalenedicarboxylic Acid can also act as an aromatic dicarboxylate linker in the synthesis of coordination polymers and metal–organic frameworks (MOFs).
Reported material systems include compounds containing cobalt, nickel, copper and zirconium. Suitability depends on the selected metal system and the material's manufacturing process.
Discuss Your Grade and Commercial Order Requirements
Share your target assay, order quantity and destination for a commercial quotation.
Packaging, Storage & Commercial Supply
Packaging & Order Quantities
1,4-Naphthalenedicarboxylic Acid is commonly supplied in 25 kg fiber drums with protective inner packaging.
| Item | Commercial Supply Details |
|---|---|
| Standard Packing | 25 kg/fiber drum |
| Industrial Order Unit | 25 kg (1 drum) |
| Bulk Quotation Quantities | 100 kg / 500 kg / 1,000 kg |
| MOQ | Based on the quoted grade and packing configuration |
| Estimated Dispatch | 3–7 working days for stocked quantities |
| Shipping | International shipment arrangements available by quotation |
Packing and dispatch arrangements are finalized according to the selected grade, order quantity and stock availability. Dispatch time is not international delivery time.
Storage & Handling
Store in tightly sealed packaging in a cool, dry and well-ventilated area. Protect the material from moisture, direct sunlight and contamination.
Keep away from incompatible oxidizing materials. Refer to the applicable SDS for detailed handling instructions.
Quality Documentation
Product enquiries may include purity requirements, moisture limits and requests for a Certificate of Analysis (COA) or Safety Data Sheet (SDS).
Available documentation will be identified for the quoted material.
Frequently Asked Questions
Is KCB Acid the same product as Fluorescent Brightener KCB?
No. KCB Acid refers to 1,4-Naphthalenedicarboxylic Acid, CAS 605-70-9. It can be used as an intermediate in certain routes to Fluorescent Brightener KCB, CAS 5089-22-5. They are different chemicals and are not interchangeable products.
Can CAS 605-70-9 replace 2,6-Naphthalenedicarboxylic Acid?
No direct substitution should be assumed. CAS 605-70-9 is the 1,4-isomer, while CAS 1141-38-4 is the 2,6-isomer. The positions of the carboxylic acid groups differ, which can affect synthesis routes and downstream material properties.
What packing and commercial quantities are available?
The standard industrial packing reference is 25 kg per fiber drum. Quotations can be requested for 25 kg, 100 kg, 500 kg and 1,000 kg quantities. The accepted minimum order quantity depends on the quoted material.
How long does dispatch take?
For stocked quantities, an estimated dispatch period of 3–7 working days may apply after order confirmation. International transit time depends on the shipping arrangement and destination.
Can product specifications and quality documents be reviewed before ordering?
Required specifications and documentation can be discussed during quotation. The available quality documents will correspond to the quoted material and grade.
Request a Quotation for CAS 605-70-9
Unilong supports enquiries for 1,4-Naphthalenedicarboxylic Acid used in fluorescent brightener intermediates, dye synthesis and specialty chemical production.
Contact our team with your required purity, quantity, packing preference and destination to discuss a commercial quotation.
