4-TERT-BUTYL-3,5-DIMETHYL-1H-PYRROLE-2-CARBOXYLIC ACID ETHYL ESTER Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 28991-95-9 |
| Product name | 4-TERT-BUTYL-3,5-DIMETHYL-1H-PYRROLE-2-CARBOXYLIC ACID ETHYL ESTER |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial 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) |
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Documents We Provide for 28991-95-9
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 28991-95-9 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 28991-95-9
| Industry | Application | Process |
|---|---|---|
| Pharmaceutical Intermediates | Key intermediate for the synthesis of the antifungal drug terbinafine | Prepared via multi-step organic synthesis, including pyrrole ring formation, alkylation, and esterification, to produce the terbinafine active pharmaceutical ingredient |
Manufacturing Quality Control of 28991-95-9
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reverse-phase HPLC with UV detection at ~254 nm, comparing peak area against a certified reference standard. |
| Related Substances | HPLC-UV/DAD | Separation and detection of structurally related impurities (e.g., hydrolysis products, isomers, residual starting materials) using gradient HPLC with diode-array detection. |
| Residual Solvents | GC-FID | Identification and quantification of volatile organic solvents (e.g., ethanol, toluene, THF) by gas chromatography with flame ionization detection against calibrated standards. |
| Heavy Metals | ICP-MS | Multi-element trace metal quantification (e.g., Pb, Cd, Ni, Fe) following acid digestion, based on elemental mass spectrometric detection. |
| Water Content | Karl Fischer Titration | Volumetric or coulometric titration using iodine-based reagent to determine water content via stoichiometric reaction with water. |
| Acid Value | Acid-Base Titration | Titration with standardized potassium hydroxide solution to quantify free carboxylic acid groups, expressed as mg KOH/g sample. |
| Residue on Ignition | Gravimetric Analysis | Heating at 700–800 °C to volatilize organic matter, followed by weighing of inorganic residue (ash). |
| Optical Rotation | Polarimetry | Measurement of specific rotation using sodium D-line light to assess chiral purity and detect enantiomeric impurities (if applicable). |
| Melting Point | Capillary Melting Point Apparatus | Determination of temperature range at which solid-to-liquid phase transition occurs, indicating crystallinity and purity. |
| Particle Size Distribution | Laser Diffraction | Analysis of dry or wet dispersed sample to determine volume-based particle size distribution (D10, D50, D90). |
Technical Specifications of 28991-95-9
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Melting Point | 124-128°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Odor | Characteristic mild ester 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 28991-95-9
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of 28991-95-9
Industrial 28991-95-9 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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