998-29-8 Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 998-29-8 |
| Product name | 998-29-8 |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeElectronic Grade |
| Packaging | 25L/drum |
| 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 998-29-8
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 998-29-8 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 998-29-8
| Industry | Application | Process |
|---|---|---|
| Organic Synthesis | Organosilicon intermediate for preparing propyl-functionalized siloxane polymers | Hydrosilylation with hydrosilanes in the presence of a catalyst (e.g., platinum-based compounds) |
| Pharmaceutical R&D | Reagent for drug molecule modification, introducing hydrophobic propyl side chains to improve pharmacokinetic properties | Acts as an alkylating agent in nucleophilic substitution or transition metal-catalyzed coupling reactions (e.g., Hiyama coupling) |
| Materials Science | Monomer for modifying silicone resins and silicone rubbers to enhance thermal stability and hydrophobicity | Copolycondensation with multifunctional silanols or chlorosilanes to form crosslinked organosilicon networks |
| Electronic Chemicals | Precursor to silane coupling agents for epoxy resins used in semiconductor encapsulation (hydrolyzed/oxidized to propyl silanol) | Acid- or base-catalyzed hydrolysis to generate reactive silanol, followed by condensation with surface hydroxyl groups on inorganic fillers |
Manufacturing Quality Control of 998-29-8
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Gas Chromatography (GC) with FID detector | Quantifies main component peak area against calibrated standard; separation based on volatility and polarity. |
| Water Content | Karl Fischer Titration | Measures water via stoichiometric reaction between iodine, sulfur dioxide, and water in methanol/pyridine medium. |
| Acidity (as HCl) | Acid-Base Titration with NaOH | Neutralizes acidic impurities using standardized sodium hydroxide solution and phenolphthalein indicator. |
| Residue on Evaporation | Gravimetric Analysis | Determines non-volatile residue after controlled evaporation and drying under inert atmosphere. |
| Color | Visual Comparison or APHA Color Scale | Compares sample color to platinum-cobalt standard solutions using Nessler tubes under controlled lighting. |
| Density at 20 C | Digital Density Meter | Measures mass per unit volume using oscillating U-tube principle with temperature-controlled sample cell. |
| Refractive Index at 20 C | Abbe Refractometer | Determines refractive index by measuring critical angle of total internal reflection at liquid-prism interface. |
| Chloride Content | Ion Chromatography (IC) | Separates and quantifies chloride ions using anion-exchange column and conductivity detection. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Measures absorbance of ground-state atoms in flame or graphite furnace at characteristic wavelength. |
| Non-Volatile Matter | Gravimetric Analysis | Weighs residue remaining after evaporation of specified sample volume under nitrogen flow at 105 C. |
| Flash Point | Closed Cup Pensky-Martens Tester | Determines lowest temperature at which vapors ignite momentarily when exposed to flame under standardized conditions. |
| Specific Gravity | Pycnometer Method | Compares mass of fixed volume of sample to same volume of water at defined temperature. |
Technical Specifications of 998-29-8
| Test Item | Specification |
|---|---|
| Appearance | Colorless to almost colorless clear liquid |
| Purity | >=98.0% (GC) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Refractive Index (n20/D) | 1.405–1.415 |
| Relative Density (20°C/25°C) | 0.775–0.785 g/cm³ |
| Odor | Characteristic 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 998-29-8
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 998-29-8
Packaging of 998-29-8
Industrial 998-29-8 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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