Phenol Red Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 143-74-8 |
| Product name | Phenol Red |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent GradeFood GradeCosmetic 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 Phenol Red
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Phenol Red Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Phenol Red
| Industry | Application | Process |
|---|---|---|
| Pharmaceutical Industry | pH Indicator | Used in laboratory settings to detect pH through color change, indicating solution acidity or alkalinity. |
| Pharmaceutical Industry | Diagnostics Reagent | Applied in urine analysis to detect protein and glucose levels. |
| Biotechnology | Cell Culture Medium Component | Employed as a pH indicator during cell culture to monitor medium pH and maintain optimal conditions for cell growth. |
| Food Industry | Food Additive (Colorant) | Used as a food colorant, though infrequently, for specific food products. |
| Cosmetics | pH Adjuster | Incorporated into cosmetic formulations to adjust product pH for improved skin compatibility. |
| Environmental Monitoring | Water Quality Analysis Reagent | Applied to assess water acidity or alkalinity, supporting evaluation of water quality. |
| Education & Research | Teaching Laboratory Reagent | Used in chemistry teaching laboratories as a pH indicator to demonstrate acid-base reaction principles. |
Manufacturing Quality Control of Phenol Red
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (pH indicator purity) | UV-Vis spectrophotometry | Measures absorbance at lambda-max (560 nm) in alkaline buffer; quantifies phenol red concentration via Beer-Lambert law using reference standard. |
| Appearance | Visual inspection | Evaluates physical state and color consistency against reference sample under controlled lighting and white background. |
| Solubility in water | Gravimetric dissolution test | Determines complete dissolution of specified mass in defined volume of distilled water at 25 C with gentle agitation. |
| Loss on drying | Thermogravimetric analysis (TGA) or oven drying | Measures mass loss after heating at 105 C for 2 h; reflects volatile impurities and residual solvents. |
| Residue on ignition | Sulfated ash method | Heats sample with sulfuric acid followed by incineration at 600 C; quantifies non-volatile inorganic residue. |
| Heavy metals (as Pb) | Atomic absorption spectroscopy (AAS) | Quantifies total heavy metal content by measuring atomic absorption of vaporized sample at characteristic wavelength after acid digestion. |
| Chloride | Potentiometric titration with AgNO3 | Titration with silver nitrate using silver electrode; endpoint detected by potential change due to AgCl precipitation. |
| Sulfate | Barium chloride turbidimetry | Precipitation of sulfate as BaSO4 in acidic medium; quantification via turbidity measurement at 420 nm. |
| Related substances (impurities) | Reverse-phase HPLC | Separates phenol red from structurally related impurities (e.g., phenols, sulfonated byproducts) using C18 column and UV detection. |
| Melting point | Capillary melting point apparatus | Determines temperature range at which solid transitions to liquid, indicating purity and identity confirmation. |
| pH of 0.04% aqueous solution | pH meter measurement | Measures hydrogen ion activity in standardized dilution to verify functional pH transition behavior (6.8–8.4). |
| Iron (Fe) | ICP-OES | Quantifies trace iron after microwave-assisted acid digestion by measuring elemental emission intensity at specific wavelength. |
Technical Specifications of Phenol Red
| Test Item | Specification |
|---|---|
| Appearance | Red crystalline powder |
| Purity | >=98.5% |
| Melting Point | 277-279°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.3% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 ppm |
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 Phenol Red
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Phenol Red
Packaging of Phenol Red
Industrial Phenol Red 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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