1,5-Naphthalene diisocyanate Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 3173-72-6 |
| Product name | 1,5-Naphthalene diisocyanate |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial Grade |
| Packaging | 25KG/bag500KG/bag1000KG/bag |
| Sample | Test Samples Available (Click to Request Samples) |
| COA | View COA |
| Price | Get Quote |
| Supply Type | Bulk / Contract manufacturing / OEM |
| Shipping | FCL / LCL available |
| Payment Terms | Support FOB \ CIF \ EXW quotations, and accept Letter of Credit (L/C). |
| Manufacturer | Greenrock Chemical(China Factory) |
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Documents We Provide for 1,5-Naphthalene diisocyanate
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 1,5-Naphthalene diisocyanate Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 1,5-Naphthalene diisocyanate
| Industry | Application | Process |
|---|---|---|
| Polyurethane Industry | Synthesis of high-performance polyurethane elastomers, coatings, adhesives, and sealants | Preparation of polyurethane prepolymers via addition polymerization with polyols (e.g., polyester polyols, polyether polyols), followed by chain extension or crosslinking cure |
| Automotive Industry | Manufacture of wear-resistant, high-resilience components such as vibration-damping elements, timing belts, and tire treads | Casting, hot-press molding, or extrusion molding using NDI-based prepolymers reacted with chain extenders (e.g., 1,4-butanediol) |
| Aerospace Industry | Production of high-temperature- and radiation-resistant structural adhesives and composite matrix resins | Two-component mixing followed by ambient-temperature or moderate-temperature (60–120 °C) curing to form highly crosslinked polyurethane networks |
| Sports Equipment | High-dynamic-performance components including premium running shoe midsoles, ski core materials, and bicycle tires | Reaction injection molding (RIM) or low-pressure resin infusion molding to achieve rapid cure and complex-shape formation |
Manufacturing Quality Control of 1,5-Naphthalene diisocyanate
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Purity | Gas Chromatography (GC) | Separates components based on volatility and interaction with column; quantifies NDI peak area relative to internal/external standard. |
| Isomer Ratio (2,6- vs 2,7-NDI) | Gas Chromatography (GC) | Resolves and quantifies structural isomers using polar capillary column and calibrated response factors. |
| Acid Number | Acid-Base Titration | Measures acidic impurities by titration with standardized KOH solution in alcoholic medium using phenolphthalein indicator. |
| Water Content | Karl Fischer Titration | Determines trace water via coulometric or volumetric reaction with iodine generated in situ from KF reagent. |
| Color (APHA) | Visual Comparison or Spectrophotometry | Compares sample color to APHA platinum-cobalt standard scale using spectrophotometer at 455 nm or visual comparator. |
| Residue on Evaporation | Gravimetric Analysis | Evaporates fixed volume under controlled conditions and weighs non-volatile residue after drying to constant mass. |
| Chloride Content | Ion Chromatography (IC) | Separates and quantifies chloride ions using anion-exchange column and conductivity detection. |
| Heavy Metals (Pb, Cd, Hg, Cr) | Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) | Atomizes and excites sample in plasma; measures element-specific emission intensities for multi-element quantification. |
| Free Isocyanate Content | Dibutylamine Back-Titration | Reacts NCO groups with excess dibutylamine, then titrates unreacted amine with HCl to determine NCO concentration. |
| Viscosity | Rotational Viscometry | Measures resistance to flow under controlled shear rate and temperature using calibrated spindle and viscometer. |
| Density | Digital Density Meter | Determines mass per unit volume via oscillating U-tube principle with temperature-controlled measurement. |
| Crystallization Point | Capillary Melting Point Apparatus | Determines solidification onset temperature by cooling sample in capillary tube and observing crystal formation under controlled rate. |
Technical Specifications of 1,5-Naphthalene diisocyanate
| Test Item | Specification |
|---|---|
| Appearance | White crystalline powder |
| Purity | >=98.0% (GC-MS) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Melting Point | 112-116°C |
| Identification (NMR) | Consistent with structure |
| Identification (IR) | Consistent with structure |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
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Download COA of 1,5-Naphthalene diisocyanate
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 1,5-Naphthalene diisocyanate
Packaging of 1,5-Naphthalene diisocyanate
Industrial 1,5-Naphthalene diisocyanate Procurement FAQ
1. How do you ensure product quality consistency?
We rely on a mature China-based manufacturing system and implement strict batch control and quality inspection for every shipment. Our production process complies with ISO 9001 standards, and a COA is provided for each batch to ensure consistent and reliable quality.
2. Do you offer competitive pricing for bulk orders?
Yes, as a China-based manufacturer and bulk supplier, we provide tiered pricing based on order volume. We support FOB and CIF quotations, as well as L/C payment terms for large transactions to meet international trade requirements.
3. Can you support large-volume or long-term supply?
We have stable production capacity and a well-established supply chain, enabling continuous bulk supply. We support ton-level and container-level orders, as well as long-term cooperation projects.
4. What is your typical lead time?
For in-stock products, shipment can be arranged within 1–3 days. For bulk packaging or customized orders, lead time depends on the specific quantity and production schedule.
5. What documents do you provide?
We can provide complete documentation upon request, including COA, SDS, TDS, and other compliance certificates, meeting industrial procurement and export requirements.
6. Can you customize product specifications or packaging?
Yes, we support customization of parameters such as purity, impurities, residual solvents, and heavy metals. We also offer various bulk packaging options, including 25kg bags, drums, and IBC tanks, suitable for industrial applications and transportation.
7. What shipping options do you support?
We support both FCL (Full Container Load) and LCL (Less than Container Load) shipments, and can flexibly arrange logistics solutions based on order size to meet bulk chemical export needs.
8. Do you provide technical or application support?
Yes, we provide basic application guidance and technical support based on industry experience to help customers optimize product usage.
9. How do you handle compliance and export regulations?
We are familiar with international trade and export regulations, ensuring all products comply with relevant requirements. We also provide complete documentation to support smooth customs clearance and global delivery.
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