China Factory Direct
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| CAS number | 157885-28-4 |
| Product name | BUTYL RESIN |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent Grade |
| Packaging | 25KG/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) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Biopharmaceuticals | Protein purification (e.g., monoclonal antibodies, enzymes, recombinant proteins) | Applied in affinity chromatography using immobilized ligands (e.g., Protein A, Protein G, lectins) for specific binding of target proteins |
| Life Science Research | Isolation and analysis of biomacromolecules such as glycoproteins, cell surface receptors, and blood group antigens | Applied in lectin affinity chromatography, immunoaffinity chromatography, and immobilized metal ion affinity chromatography (IMAC) |
| Diagnostics Development | Preparation and quality control of high-purity antigens/antibodies | Applied in batch purification to remove impurities including host cell proteins (HCP), nucleic acids, and endotoxins |
| Vaccine Manufacturing | Purification of virus-like particles (VLPs) and viral antigens | Applied in affinity chromatography with size-exclusion enhancement or mixed-mode purification combining ion exchange and affinity chromatography |
| Detection Item | Common Analytical Method | Method Overview |
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| Appearance | Visual Inspection | Assessment of physical form, color, and homogeneity under controlled lighting conditions. |
| Particle Size Distribution | Laser Diffraction | Measurement of particle size distribution based on light scattering patterns of suspended gel particles. |
| Bead Uniformity | Microscopy with Image Analysis | Quantitative evaluation of bead shape and size consistency using optical microscopy and digital image processing. |
| Water Content | Karl Fischer Titration | Volumetric or coulometric titration using iodine-based reagent to quantify trace water content. |
| Total Protein Binding Capacity | UV-Vis Spectrophotometry | Determination of binding capacity by measuring absorbance change after incubation with standard protein (e.g., BSA). |
| Flow Rate | Pressure-Flow Test | Measurement of linear flow velocity under standardized pressure and column geometry conditions. |
| Chemical Stability (pH 3–12) | pH Stability Assay | Incubation at defined pH buffers followed by assessment of structural integrity and binding retention. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-MS | Multi-element quantification of trace heavy metals after acid digestion and plasma ionization. |
| Residual Ethylene Bromide | GC-MS | Extraction and quantification of residual alkylating agent using gas chromatography coupled with mass spectrometry. |
| Microbial Contamination | Membrane Filtration and Culture | Enumeration of aerobic microorganisms via filtration, membrane transfer to agar media, and colony counting. |
| Endotoxin Level | LAL Assay | Quantification of bacterial endotoxins using Limulus amebocyte lysate coagulation reaction. |
| Functional Ligand Density | Elemental Analysis (N or S) | Determination of coupled ligand concentration via quantitative measurement of characteristic heteroatoms (e.g., nitrogen for amine coupling). |
| Test Item | Specification |
|---|---|
| Appearance | Off-white to light brown granular solid |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.3% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=1.0% |
| Solubility | Swells in water; insoluble in organic solvents |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
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.