O-Cresolphthalein (Yellow) CAS 596-27-0 3, 3-Bis (4-hydroxy-3-methylphenyl) -1 (3H) -Isobenzofuranone

• CAS No.: 596-27-0
• Formula: C22h18o4
• EINECS: 209-881-8
• Classification: Potassium Hydroxide
• Appearance: Solid
• Grade Standard: Agriculture Grade
• Model NO.: SUREST-147
• Solubleness: Soluble Alkali
• Ionization Capacity: Strong Alkali
• Quality: Superior Grade
• Usage: Industrial Alkali
• Shelf Life: 2 Years
• Stock: Available
• Molecular Weight: 346.38
• Color: Yellow
• Melting Point: 223-225 ºC
• Water Solubility: Slightly Soluble
• Transport Package: 25kg or 200 Kg/Barrel
• Specification: 98%min
• Trademark: Surest
• Origin: China
• HS Code: 2932209090
• Production Capacity: 1000 Tons Yearly

Product Description

o-Cresolphthalein (Yellow)
 

Name	o-Cresolphthalein(Yellow)
Synonyms	3,3-Bis(4-hydroxy-3-methylphenyl)-1(3H)-isobenzofuranone
Molecular Structure
Molecular Formula	C22H18O4
Molecular Weight	346.38
CAS Registry Number	596-27-0
EINECS	209-881-8

Properties

Melting point	223-225 ºC
Water solubility	slightly soluble

Chemical Property/Description

1. Physical properties: o-Cresolphthalein (Yellow) is a white to light yellow crystalline powder with good solubility, soluble in ethanol, ether and other organic solvents, slightly soluble in water and acidic solutions.

2. Chemical properties:o-Cresolphthalein (Yellow) is an acid-base indicator, and its color changes with the change of pH value. In acidic environment, o-Cresolphthalein (Yellow) is colorless. In neutral or appears red. This property makes it used as an acid-base indicator in many chemical experiments.alkaline environments.



Main Uses:

1. Acid-base indicator: Because the color of o-Cresolphthalein (Yellow) changes with the change of pH value, it is commonly used as an acid-base indicator. In the chemical experiment, by observing the color change of o-Cresolphthalein (Yellow), we can judge whether the chemical reaction has reached the end point, so as to control the experimental process.

2. Pharmaceutical intermediates: o-Cresolphthalein (Yellow) can be used as a pharmaceutical intermediate for the synthesis of antibacterial drugs, antipyretic analgesics and other drugs. For example, o-crephenolphthalein can be used in the synthesis of non-steroidal anti-inflammatory drugs such as aspirin.

3. Dye intermediates: o-Cresolphthalein (Yellow) can also be used to synthesize dye intermediates, such as cationic dyes, acid dyes, etc. These dyes are widely used in textile, printing and dyeing, papermaking and other industries.

 

Detailed Photos