Hot Sales Chemical Reagent Thymolphthalein CAS 125-20-2 for PH Indicator

1. Basic information

English name: Thymolphthalein

Alias: Thyme phenolphthalein; 3,3-bis (4-hydroxy-5-methyl-2-isopropylphenyl) -1 (3H) - isobenzofuranone

CAS number: 125-20-2

Molecular formula: C28H30O4

Molecular weight: 430.54

2. Physical and chemical properties

Appearance: Usually white or slightly yellow crystalline powder.

Melting point: 248-254 ° C.

Density: The theoretical density is approximately 1.12 g/cm ³.

Solubility: Insoluble in water, easily soluble in organic solvents such as ethanol, ether, acetone, etc. It appears yellow in concentrated sulfuric acid and blue in alkaline solutions.

3. Main purpose

Acid base indicator: It is a commonly used acid base indicator that undergoes a color change within the pH range of 9.3-10.5. It is colorless when the pH is below 9.3 and blue when the pH is above 10.5. It is widely used in acid-base titration experiments, especially in weak base titration of strong acid and other experiments that require accurate determination of the alkaline endpoint.

In the field of medicine, it is sometimes used as an intermediate in drug synthesis or in certain drug analysis experiments to help determine the acid-base properties of drugs or their stability in specific pH environments.

Other applications: In some chemical analysis and industrial production processes, it is used to monitor changes in the acidity and alkalinity of solutions, ensuring that reactions occur under appropriate pH conditions. For example, in the production process of certain fine chemical products, the pH value of the reaction system is controlled to ensure product quality and smooth reaction.

Packaging Details: 25 kg/bag or as your requirement.
Port: Tianjin/ Qingdao/ Shanghai, etc.
We can ship the samples by air.
Lead Time: Within 2~3days Shipment after receiving the advance payment or original L/C.

XI'AN YI HANG CHEMICAL CO.,LTD was founded in 2002, located in xian City, shannxi, China. We are the high-tech chemical enterprise which specialized in researching, manufacturing and trading for chemical raw materials ,our products widely used in paints, textile, rubber, leather, plastic and so on.

With many years development and operation,we have become the group company for chemical production,we have the owned factory for produce stable quality products with high performance, and the advanced lab to ensure the best quality of each batch products.

We have our strictly quality control in our production, and we have passed ISO9001:2015 Quality Management System Certification and ISO14001 Environment Management System Certification.

Our main products includes Titanium Dioxide, Lithopone, Iron Oxide series, Chrome Oxide Green, Zinc Oxide, Carbon Black, STPP, SHMP, Oxalic Acid, DOP, SLES, and so on.

Q1: Are you manufacturer or trading company?

A1:Manufacturer.

Q2: Can I get some sample?
A2: Yes, usually 10-25g sample for free.

Q3: Is there a discount?
A3: Of course, welcome to contact us. Price would be different based on different quantity. For bulk
quantity, we will have discount for you.

Q4: How long for production and delivery?
A4: Most products we have in stock, sent time:Within 1-3 business days after received payment. Customized products further discussed.

Q5: Do you accept ODM or OEM service?
A5: Yes,we accept ODM and OEM services, ranges: Soft gel, Capsule, Tablet, Sachet, Granule,Private Label service, etc. Please contact us to design your own brand product.

Q6: How to deliver the goods?
A6: ≤50kg ship by FedEx or DHL etc, ≥50kg ship by Air, ≥100kg can be shipped by Sea. If you have special request on delivery, please contact us.

Q7: How to start orders or make payments?
A7:There are two ways for you to confirm order:
1. Proforma invoice with our company bank details will be sent to you once the order confirmed by Email. Pls arrange payment by TT. Goods will be sent after received payment within 1-3 business days.
2. Trade assurance order will be drafted for you through ALIBABA. Pls confirm and pay through Alibaba. Goods will be sent after received payment within 1-3 business days.