DL-DOPA Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 63-84-3 |
| Product name | DL-DOPA |
| 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 DL-DOPA
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk DL-DOPA Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of DL-DOPA
| Industry | Application | Process |
|---|---|---|
| Pharmaceutical Industry | Intermediate for anti-Parkinson’s drugs (e.g., L-DOPA) | Serves as a chemical synthesis precursor in the preparation of decarboxylase inhibitor combination formulations or in subsequent chiral resolution to produce L-DOPA |
| Pharmaceutical Industry | Pharmaceutical reference standards and controls | Used as qualitative and quantitative references in drug analysis, quality control testing, and pharmacological experiments |
| Biochemical Research | Tyrosinase inhibition studies | Employed as substrate or inhibitor in enzyme kinetic and antioxidant mechanism studies |
| Cosmetics Industry | Skin-lightening and antioxidant agent | Incorporated into skincare formulation development leveraging its antioxidant properties and ability to inhibit tyrosinase activity (thereby suppressing melanin formation) |
| Chemical Analysis | Chemical reagent | Used in colorimetric enzyme activity assays or as a chromogenic component in chemical analysis |
Manufacturing Quality Control of DL-DOPA
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Identification | Infrared Spectroscopy (IR) | Utilizes the characteristic absorption peaks of DL-Dopa in the infrared region for structural confirmation, comparing with standard spectra to verify its chemical structure. |
| Content Determination | High-Performance Liquid Chromatography (HPLC) | Uses a reversed-phase C18 column with a UV detector (typically around 280 nm). The retention time is used for qualitative analysis, and peak area for quantitative determination of the main component content. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Same as above, using gradient elution to separate impurity components. The impurity content is calculated based on peak area to assess purity. |
| Specific Rotation | Polarimetry | Determines the optical rotation of the sample at a specific wavelength (e.g., sodium D line, 589 nm) and temperature, used to determine whether there are optical activity differences (DL-type is racemic, theoretical specific rotation close to 0). |
| Loss on Drying | Thermogravimetric Analysis or Oven Drying Method | Dries the sample at a specified temperature (e.g., 105°C) until constant weight, calculating the moisture and volatile substance content based on weight loss. |
| Residue on Ignition | Sulfated Ash Method | The sample is carbonized at high temperature and treated with sulfuric acid, then ignited in a muffle furnace. The weight of the residue is measured to evaluate the content of inorganic impurities. |
| Heavy Metals | Atomic Absorption Spectrometry (AAS) or Thiourea Method | After wet digestion, heavy metal elements such as lead and cadmium are determined by AAS; or total heavy metals are semi-quantitatively detected through colorimetric reactions. |
| Chlorides | Silver Nitrate Turbidimetric Method | In nitric acid medium, chloride ions react with silver nitrate to form a white precipitate. The turbidity is measured to determine the chloride limit. |
| Sulfates | Barium Chloride Turbidimetric Method | In hydrochloric acid medium, sulfate ions react with barium chloride to form barium sulfate precipitate. The turbidity is measured to determine sulfate content. |
| Solution Clarity | Visual Turbidity Method | Dissolve the sample in a specified solvent (e.g., water), and compare it with a standard turbidity solution to determine if the solution is clear. |
| pH Value | pH Meter Measurement Method | Prepare a solution of DL-Dopa at a certain concentration, and measure its pH value using a calibrated pH meter, controlling it within the specified range. |
Technical Specifications of DL-DOPA
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 242-246°C (decomposes) |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Optical Rotation | -0.5° to +0.5° (c=1, H2O) |
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 DL-DOPA
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of DL-DOPA
Packaging of DL-DOPA
Industrial DL-DOPA 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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