Company Informations
Hunan Yunbang Pharmaceutical Co., Ltd. (Yunbangpharm) located in Changsha High-tech Industrial Park, Hunan. It is a high-tech enterprise specializing in the research and development, production and sales of Pharmaceutical raw materials, Pharmaceutical intermediates(API) and Fine chemicals. Based in China, Yunbangpharm has been providing suitable solutions for many domestic,foreign pharmaceutical companies and traders. Excellent quality, good reputation and authentic price have won the praise of the majority of customers.
The company adheres to the corporate tenet of "We do not produce medicines, but help pharmaceutical companies make good medicines".
We can provide customers with customized processing, research and development services;
We can develop high-end Pharmaceutical and chemical products with high technical difficulties,high barriers and unique production processes;
We can provide 100 grams Grade, kilograms, and hundred kilograms of raw material pharmaceutical intermediates and other products.
We can perform -100°C to 300°C reaction.
R&D strength is the company's core competitiveness.Yunbangpharm has maintains a good cooperation relationship with many Universities and Research institutes locally, which can quickly transform R&D results into industrial production.
Our goal : To achieve the integrated upgrade of Pharmaceutical intermediates, raw materials and high-end chemical products, adhere to "serving pharmaceutical companies, creating our brands" to provide customers with high-quality and low-cost pharmaceutical and chemical products, realizing Win-win cooperation and common development.
FAQ
1:Can I get some samples before bulk order?
A: Most products provide free samples, but the shipping cost be paid by customers.
2: What's your MOQ?
A: We can have a discussion.
3: Which kind of payment terms do you accept?
A: PI will be sent first after confirmation of order,enclosed our bank information.Payment by T/T, Western Union,D/P, ETC.
4.How to place an order?
A: You can contact me through Trademanager, WhatsApp, Email and other contact methods, tell me the product and quantity you need, and then we will give you a quote.
5:How about your delivery time?
A: Generally, it will take 3 to 5 days after receiving your advance payment.
6:How do you treat quality complaint?
A: First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.
Product analysis
| Product Name: |
o-Cresolphthalein |
| Synonyms: |
3',3''-dimethyl-phenolphthalei;cresolphthalein;Di-o-Cresolphthalide;o-Cresolphalein;o-cresolphtaleine;3,3-bis(4-hydroxy-3-methylphenyl)-(3H)-Isobenzofuranone;3,3-bis(4-hydroxy-3-methylphenyl)-1(3h)-isobenzofuranon;3,3-Bis(4-hydroxy-3-methylphenyl)-1-(3H)-iso-benzofuranone |
| CAS: |
596-27-0 |
| MF: |
C22H18O4 |
| MW: |
346.38 |
| EINECS: |
209-881-8 |
| Product Categories: |
Phthalein;Analytical Chemistry;Indicator (pH);pH Indicators;CTitration;Indicators;pH Indicators - Solids;Stains and Dyes;Stains&Dyes, A to |
| Mol File: |
596-27-0.mol |
| o-Cresolphthalein Chemical Properties |
| Melting point |
223-225 °C |
| Boiling point |
401.12°C (rough estimate) |
| density |
1.1425 (rough estimate) |
| refractive index |
1.4400 (estimate) |
| solubility |
Solubility Slightly soluble in water; soluble in ethanol |
| form |
powder |
| pka |
9.40(at 25ºC) |
| color |
Clear colorless |
| PH Range |
8.2 (colorless) - 9.8 (violet/red) |
| Water Solubility |
slightly soluble |
| λmax |
566nm, 381nm |
| Merck |
14,2576 |
| BRN |
310554 |
| Major Application |
Sensors, display device, photoresists, recording materials, imaging materials, authentication system for secure documents, decoder system, lithium cells, electroplating process, inks, markers, toners, correction fluid, paints, adhesives, floor coatings, gas leaking detector for safety in industries, toys, food storage, diapers, determination of calcium, lotions, urine analysis test strips, drugs, blood analysis |
| InChIKey |
CPBJMKMKNCRKQB-UHFFFAOYSA-N |
| CAS DataBase Reference |
596-27-0(CAS DataBase Reference) |
| EPA Substance Registry System |
1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-3-methylphenyl)- (596-27-0) |
| Hazard Codes |
Xn |
| Risk Statements |
40-36/37/38-20/21/22 |
| Safety Statements |
36/37-36-26 |
| RIDADR |
1170 |
| WGK Germany |
3 |
| RTECS |
SM8390000 |
| TSCA |
Yes |
| HS Code |
3822.19.0080 |
| Chemical Properties |
white to pink or beige to tan powder. soluble in ethanol, ether, glacial acetic acid, soluble in dilute alkali and turns purple, slightly soluble in water, hardly soluble in benzene. |
| Uses |
O-Cresolphthalein has been used as a component in calcifying media for calcification assay. It is also used as an indicator (pH range, 8.2 colorless, 9.8 red) and analytical reagent. |
| Application |
O-Cresolphthalein is a gadolinium chelate that is used as a contrast agent for magnetic resonance imaging (MRI) of the brain, spine, and joints. The gadolinium ion is bound to the cresol molecule, which has an attached hydroxyl group. This complex attaches to the phosphorous pentoxide and creates a precipitate of metal hydroxides in the presence of water and sodium carbonate. O-Cresolphthalein is also used in clinical pathology to measure glomerular filtration rate (GFR), which is important for diagnosing renal disease. MRI scans are used to diagnose osteogenic genes that are associated with bone diseases such as osteoporosis. |
| Biochem/physiol Actions |
o-Cresolphthalein is a reversible pH indicator. The kinetics of the reverse pathway (red-purple to colorless) is slow, thereby making it an appropriate molecule to check flow patterns in ducts with corrugated walls. It is also used for the colorimetric determination of calcium content via the o-cresolphthalein complexone method. Binding of calcium to o-cresolphthalein, in the presence of alkaline conditions (pH 10-12), results in the formation of a red complex with an absorbance at 570-575nm. |
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