China Factory Direct
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| CAS number | 3779-29-1 |
| Product name | Diethyl 1,1-cyclobutanedicarboxylate |
| 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) |
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 |
|---|---|---|
| Chemical Synthesis | Organic synthesis intermediate for preparing functionalized molecules and fine chemicals | Synthesis and transformation of ester compounds; commonly serves as a precursor to cyclobutane derivatives in multistep reactions |
| Pharmaceutical R&D | Synthesis of active pharmaceutical ingredients (APIs) or intermediates, particularly in drug design incorporating cyclobutane motifs | Construction of complex medicinal molecular scaffolds via hydrolysis, reduction, or coupling reactions of the ester group |
| Materials Science | Monomer or crosslinker for polymer materials and functional polymers | Participation in condensation or ring-opening polymerization to develop polymers with enhanced thermal stability and mechanical properties |
| Agrochemical Chemistry | Synthesis of structurally specific agrochemical intermediates | Selective functional group transformations to introduce insecticidal or herbicidal pharmacophores |
| Fine Chemicals | Manufacture of dyes, fragrances, and specialty additives | Raw material in transesterification, acylation, or cyclization reactions to produce target compounds |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Gas Chromatography (GC) with FID detection | Quantitative determination based on peak area comparison against a certified reference standard using a non-polar capillary column. |
| Water Content | Karl Fischer Titration (Coulometric) | Electrochemical titration where iodine is generated in situ to react stoichiometrically with water; endpoint detected by current change. |
| Acid Value | Acid-Base Titration (NaOH in ethanol) | Neutralization of free carboxylic acid groups with standardized sodium hydroxide solution using phenolphthalein indicator. |
| Residue on Ignition | Gravimetric Analysis (Weight Loss on Ignition) | Measurement of non-volatile inorganic residue after controlled high-temperature ashing at 700-800 C. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Quantification of total heavy metals after wet digestion, using lead as the surrogate metal and air-acetylene flame. |
| Chloride Impurity | Ion Chromatography (IC) | Separation and quantification of chloride anions on an anion-exchange column with suppressed conductivity detection. |
| Related Substances | High Performance Liquid Chromatography (HPLC) with UV detection | Separation and identification of structurally related impurities using reverse-phase C18 column and UV absorbance at 210 nm. |
| Color | Visual Comparison (APHA/Hazen Scale) | Subjective assessment of sample color intensity against platinum-cobalt standard solutions in a Nessler tube under controlled lighting. |
| Density | Digital Density Meter (Oscillating U-tube) | Determination of mass per unit volume at 20 C based on resonant frequency shift of a vibrating U-shaped glass tube filled with sample. |
| Refractive Index | Refractometry (Abbe Refractometer) | Measurement of light bending angle at air-sample interface at 20 C using sodium D-line (589 nm) illumination. |
| Residual Solvents (Ethanol, Ethyl Acetate) | Headspace Gas Chromatography (HS-GC) with FID | Quantitative analysis of volatile solvents after thermal equilibration in sealed vials followed by gas-phase injection. |
| Melting Point | Capillary Melting Point Apparatus | Determination of temperature range over which solid transitions to liquid, observed visually through calibrated capillary tube heating. |
| Test Item | Specification |
|---|---|
| Appearance | Colorless liquid |
| Purity | >=98.0% (GC-MS) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Identification (NMR) | Consistent with structure |
| Refractive Index (n20/D) | 1.435–1.445 |
| Relative Density (20°C/25°C) | 1.070–1.090 g/cm³ |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
| Pictograms | ![]() |
| Signal Word | Warning |
| Safety Data Sheet | |
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.