Bromocresol Purple Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 115-40-2 |
| Product name | Bromocresol Purple |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial Grade |
| Packaging | 25KG/bag500KG/bag1000KG/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 Bromocresol Purple
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Bromocresol Purple Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Bromocresol Purple
| Industry | Application | Process |
|---|---|---|
| Biochemistry | pH indicator in microbial culture media | Added to culture media to monitor pH changes during fermentation, indicated by a color shift from yellow at pH 5.2 to purple at pH 6.8 |
| Clinical Diagnostics | Serum protein separation | Used as a tracking dye in agarose electrophoresis to differentiate albumin from globulins |
| Medical Testing | Urine pH measurement | Formulated into test strips or solutions for determining urine acidity or alkalinity via colorimetric response |
| Analytical Chemistry | Acid-base titration indicator | Employed in titration analyses—particularly in non-aqueous systems or within specific pH ranges—to signal the endpoint |
| Environmental/Industrial Testing | Microbiological water testing (e.g., total coliforms) | Used to identify acid and gas production during detection—indicated by a color change from purple to yellow |
Manufacturing Quality Control of Bromocresol Purple
| Test Item | Common Test Methods | Method Summary |
|---|---|---|
| Purity Determination | High-Performance Liquid Chromatography (HPLC) | Uses a reversed-phase column with methanol-buffer salt as the mobile phase. The main peak area is detected at a specific wavelength (e.g., 590 nm), and the purity percentage is calculated. Suitable for quantitative analysis of impurities and main components. |
| Maximum Absorption Wavelength Verification | UV-Visible Spectrophotometry | The sample is dissolved in an appropriate buffer solution (e.g., pH 6.8 phosphate buffer), and scanned in the range of 400–700 nm to confirm whether the maximum absorption peak is at 590±2 nm, consistent with the indicator characteristics. |
| pH Color Change Range Determination | Colorimetric Method / Spectrophotometric Titration | Prepare buffer solutions with different pH gradients, add equal amounts of sample, and observe or measure the color transition point (yellow → purple) to confirm if the color change range is pH 5.2–6.8. |
| Loss on Drying | Loss on Drying Method | The sample is dried at a constant weight in a 105°C oven, and the percentage of mass loss is calculated to evaluate the content of moisture and volatile substances. |
| Sulfated Ash (Residue on Ignition) | High-Temperature Ashing Method | The sample is carbonized with sulfuric acid, then ignited at 600–800°C in a muffle furnace until constant weight. The residue is weighed to evaluate the content of inorganic impurities. |
| Heavy Metal Limit Test | Thioacetamide Method / ICP-MS | According to the general chapter of the Chinese Pharmacopoeia, the sample is digested and then reacted with thioacetamide for color comparison, or analyzed by ICP-MS for precise determination of elements such as lead, arsenic, and cadmium. |
| Water-Insoluble Matter Check | Filtration and Weighing Method | The sample is dissolved in a specified volume of water, the undissolved matter is filtered, dried, and weighed to evaluate the content of physical impurities. |
| Content Determination (Titrimetric Method) | Acid-Base Titration (Non-aqueous Medium) | In an acetic acid medium, the sample is titrated with perchloric acid titrant using crystal violet as an indicator, to determine the total acidic dye content. Suitable for active pharmaceutical ingredient (API) quality control. |
Technical Specifications of Bromocresol Purple
| Test Item | Specification |
|---|---|
| Appearance | Purple crystalline powder |
| Purity | >=98.5% |
| Melting Point | 223-227°C |
| Total Impurities | <=1.5% |
| Water Content (KF) | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=20 ppm |
| Solubility | Soluble in ethanol, methanol, and aqueous alkali; practically insoluble in water |
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 Bromocresol Purple
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Bromocresol Purple
Packaging of Bromocresol Purple
Industrial Bromocresol Purple 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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