m-Tolyl isocyanate Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 621-29-4 |
| Product name | m-Tolyl isocyanate |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural GradePharmaceutical GradeMaterial GradeSpecialty GradeIndustrial Grade |
| Packaging | 25L/drum200L/drum1000L/IBC |
| 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 m-Tolyl isocyanate
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk m-Tolyl isocyanate Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of m-Tolyl isocyanate
| Industry | Application | Process |
|---|---|---|
| Chemicals | Synthesis of polyurethane coatings and adhesives | Reaction of isocyanates with polyols |
| Pharmaceuticals | Production of antimicrobial agents and pharmaceutical intermediates | Reaction with amines to form target compounds |
| Agriculture | Manufacture of pesticide intermediates | Reaction with alcohols or amines to generate active ingredients |
| Materials | Production of high-performance elastomers and foam materials | Polyol chain extension |
| Dyes & Pigments | Synthesis of specialty functional dyes | Condensation with hydroxyl- or amino-containing compounds |
Manufacturing Quality Control of m-Tolyl isocyanate
| Test Item | Common Test Method | Method Overview |
|---|---|---|
| Purity (Main Component Content) | Gas Chromatography (GC) | Capillary column gas chromatography is used with area normalization or external standard method for quantification. The purity of m-tolyl isocyanate is evaluated based on the peak area percentage of the main component. Typically, an FID detector is used, with nitrogen or helium as the carrier gas. |
| Isocyanate Group (-NCO) Content | Titration Method (Dibutylamine Method) | The sample reacts with excess dibutylamine to form a urea derivative. Unreacted dibutylamine is back-titrated with a standardized hydrochloric acid solution. The -NCO content is calculated from the amount of hydrochloric acid consumed. This method is recommended by standards such as ISO 14896. |
| Moisture Content | Karl Fischer Titration | Moisture in the sample reacts quantitatively with Karl Fischer reagent. Water content is determined using either coulometric or volumetric methods. Due to the high reactivity of isocyanates with water, testing must be performed quickly and under inert atmosphere. |
| Color | Platinum-Cobalt Colorimetric Method (Hazen Method) | The sample is placed in a colorimeter tube and visually compared to standard platinum-cobalt solutions to determine color intensity. Results are expressed in Hazen units (or APHA units), used to evaluate product appearance and degree of oxidation or impurity. |
| Acid Value | Acid-Base Titration | Free acids in the sample (e.g., trace amounts of toluene dicarboxylic acid) are titrated with a standardized potassium hydroxide ethanol solution, using phenolphthalein as indicator. The acid value is expressed as mg KOH per gram of sample. |
| Volatile Impurities / Residual Solvents | Gas Chromatography-Mass Spectrometry (GC-MS) or Headspace Gas Chromatography (HS-GC) | Volatile organic impurities (e.g., residual solvents such as toluene, chlorobenzene) are separated and identified by GC or GC-MS. Quantification is performed using internal or external standard methods, in compliance with guidelines such as ICH Q3C. |
| Density | Density Meter or Pycnometer Method | Density is measured at a specified temperature (e.g., 20°C or 25°C) using a digital density meter or pycnometer, serving as an auxiliary quality control parameter. |
Technical Specifications of m-Tolyl isocyanate
| Test Item | Specification |
|---|---|
| Appearance | Colorless to yellow to orange clear liquid |
| Purity | >=98.0% (GC) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Refractive Index (n20/D) | 1.545–1.555 |
| Relative Density (20°C/25°C) | 1.075–1.095 g/cm³ |
| Odor | Characteristic pungent odor |
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 m-Tolyl isocyanate
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of m-Tolyl isocyanate
Packaging of m-Tolyl isocyanate
Industrial m-Tolyl isocyanate 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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