Chlorosulfonyl isocyanate Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 1189-71-5 |
| Product name | Chlorosulfonyl isocyanate |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural 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 Chlorosulfonyl isocyanate
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Chlorosulfonyl isocyanate Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Chlorosulfonyl isocyanate
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Synthesis of antibiotics, antiviral agents, and nitrogen-containing heterocyclic intermediates | Used as a chlorosulfonylation reagent and isocyanate source in cycloaddition or nucleophilic substitution reactions to construct heterocyclic frameworks |
| Agrochemicals | Synthesis of active ingredients for high-efficacy insecticides and herbicides | Employed to introduce sulfonyl and isocyanate functional groups, enhancing molecular bioactivity and selectivity |
| Organic Synthesis | Preparation of functionalized compounds including sulfonamides, ureas, and carbamates | Undergoes addition or substitution reactions with amines, alcohols, or alkenes to achieve functional group transformation |
| Materials Science | Synthesis of functional polymer monomers or crosslinkers | Reacts via the isocyanate group with hydroxyl or amino groups to form polyurethane or polyurea structures |
| Fine Chemicals | Synthesis of dyes, fluorescent probes, and specialty additives | Acts as a multifunctional reagent for constructing complex molecular architectures to enhance product performance |
Manufacturing Quality Control of Chlorosulfonyl isocyanate
| Test Item | Common Testing Method | Method Description |
|---|---|---|
| Purity (Active Ingredient Content) | Gas Chromatography (GC) | The sample is separated using a capillary column, and the peak area of chlorosulfonyl isocyanate is quantified by FID detector. Purity is calculated by comparison with standard samples. Sample dilution and inerting the injection system are required to prevent decomposition. |
| Water Content | Karl Fischer Titration | Iodine-sulfur dioxide-pyridine-methanol reagent reacts quantitatively with water, and micro-water content is determined by electrochemical titration. Suitable for precise control of low moisture (<0.1%). Due to CSIC's violent reaction with water, strictly anhydrous operations are required. |
| Free Chlorine (Cl₂) | Iodometric or Colorimetric Method | Free chlorine oxidizes iodide ions to iodine, which is then titrated with sodium thiosulfate or measured colorimetrically using starch as an indicator. Used to monitor possible chlorine gas impurities in raw materials, since CSIC can decompose to produce Cl₂. |
| Acidity (Total Acid) | Non-aqueous Titration (e.g., Perchloric Acid Titration) | In an anhydrous solvent (such as glacial acetic acid), hydrochloric acid or other acidic impurities are titrated with perchloric acid standard solution. Endpoint is determined potentiometrically or via indicator. Suitable for detecting acidic substances without hydrolysis interference. |
| Hydrogen Chloride (HCl) Content | Absorption-Titration Method | The sample is passed into an alkaline absorbent solution (e.g., NaOH), followed by back-titration of the remaining alkali with standard acid to calculate the HCl released. Used to assess HCl impurities generated during storage or transportation due to decomposition. |
| Appearance and Color | Visual Color Comparison / Spectrophotometry | Clear to slightly yellow transparent liquid is considered acceptable. A spectrophotometer measures absorbance in the visible range (e.g., 400–500 nm) to quantify color depth and judge oxidation or decomposition level. |
| Thermal Stability (Decomposition Products) | Thermogravimetric Analysis (TGA) / Differential Scanning Calorimetry (DSC) | Under an inert atmosphere, mass loss or exothermic peaks are monitored during heating to evaluate the decomposition behavior of CSIC at different temperatures. Used to determine safe storage and usage temperature ranges. |
| Heavy Metal Impurities | Atomic Absorption Spectroscopy (AAS) or ICP-MS | After acid digestion of the sample, lead, cadmium, mercury, and other heavy metals are detected using AAS or ICP-MS to ensure compliance with chemical raw material safety standards (e.g., GB/T 3050). |
| Residual Solvents | Gas Chromatography-Mass Spectrometry (GC-MS) | Detects residual organic solvents (e.g., dichloromethane, acetonitrile) from the production process. Selective ion monitoring (SIM) mode is used to enhance sensitivity and specificity. |
| Chlorosulfonyl/Isocyanate Functional Group Verification | Fourier Transform Infrared Spectroscopy (FT-IR) | Identify characteristic absorption peaks: ~2270 cm⁻¹ (-N=C=O isocyanate group), ~1350 cm⁻¹ and ~1150 cm⁻¹ (S=O and S-O stretching vibrations) to confirm structural integrity. |
| Hydrolytic Stability (Simulated Test) | Hydrolysis Followed by GC or Titration Analysis | After reacting the sample with trace amounts of water, the content of products such as HCl, SO₂, or sulfonic acids is measured to evaluate its sensitivity to moisture and guide packaging and storage condition design. |
Technical Specifications of Chlorosulfonyl isocyanate
| Test Item | Specification |
|---|---|
| Appearance | Clear, colorless liquid |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Refractive Index (n20/D) | 1.475–1.485 |
| Relative Density (20°C/25°C) | 1.43–1.45 g/cm³ |
| Odor | Pungent, characteristic |
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 Chlorosulfonyl isocyanate
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Packaging of Chlorosulfonyl isocyanate
Industrial Chlorosulfonyl 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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