Phenolphthalein Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 77-09-8 |
| Product name | Phenolphthalein |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent 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 Phenolphthalein
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Phenolphthalein Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Phenolphthalein
| Industry | Application | Process |
|---|---|---|
| Chemical Analysis | Acid-base indicator | Used in titration analysis to determine the endpoint, exhibiting a color change from colorless to pink or purplish-red within the pH range of 8.2–10.0 |
| Pharmaceuticals | Laxative (historical use) | Previously employed as a stimulant laxative for constipation treatment; banned in most countries due to potential carcinogenicity |
| Education | Teaching reagent for laboratory experiments | Used in secondary and tertiary chemistry laboratories to demonstrate acid-base reactions and indicator color-change principles |
| Research | Organic synthesis intermediate | Served as a raw material or reference compound in synthesizing certain fluorescent compounds and functional materials |
Manufacturing Quality Control of Phenolphthalein
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the color and physical state of the sample. Qualified phenolphthalein should be white to slightly yellow crystalline powder, free from visible foreign matter. |
| Identification | Ultraviolet-Visible Spectrophotometry (UV-Vis) | Utilize the characteristic absorption peak of phenolphthalein in alkaline conditions at a specific wavelength (e.g., 550–560 nm) for qualitative identification. |
| Chemical Color Reaction Test | Add sodium hydroxide solution; phenolphthalein should exhibit a typical pink or purple-red color, which fades upon acidification—used for preliminary identification. | |
| Assay | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase column (e.g., C18) with a UV detector (around 254 nm) to quantify phenolphthalein purity based on retention time and peak area. |
| Ultraviolet Spectrophotometry (UV) | Measure absorbance at the maximum absorption wavelength and calculate concentration using a standard curve; suitable for quantitative analysis of relatively pure samples. | |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Detect possible residual intermediates or degradation products from synthesis (e.g., phenolsulfonphthalein, bisphenol A) to evaluate impurity levels. |
| Loss on Drying | Thermogravimetric Analysis (TGA) or Oven Drying Method | Dry the sample at 105°C until constant weight is achieved, then determine the percentage weight loss to control moisture and volatile impurities. |
| Sulfated Ash (Residue on Ignition) | Sulfuric Acid Treatment Followed by High-Temperature Ignition | The sample is carbonized with sulfuric acid and then ignited at high temperature (700–800°C); the residue is weighed to assess inorganic impurity content. |
| Heavy Metals | Thioacetamide Method (Pharmacopoeial Method) | In mildly acidic conditions, heavy metals react with thioacetamide to form colored sulfides, and total heavy metal content is determined by colorimetry. |
| Solubility | Solubility Test | Evaluate solubility in solvents such as water, ethanol, and chloroform to confirm compliance with pharmacopoeial specifications. |
| pH Value (Solution) | pH Meter Method | Prepare a solution of specified concentration in ethanol or dilute alkali, then measure pH using a pH meter to assist in assessing acidity/basicity and stability. |
Technical Specifications of Phenolphthalein
| Test Item | Specification |
|---|---|
| Appearance | White or off-white powder |
| Assay | 98.0% ~ 101.0% |
| Loss on drying | ≤0.5% |
| Chloride | ≤100 ppm |
| Sulfate | ≤200 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 Phenolphthalein
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Phenolphthalein
Packaging of Phenolphthalein
Industrial Phenolphthalein 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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