Cresol Red

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MOQ : 1 Kilograms

Cresol Red Specification

Melting Point
>220C (decomposes)

Smell
Odorless

Usage
Laboratory use; pH indicator for titrations and gel electrophoresis

HS Code
38220090

Molecular Weight
382.43 g/mol

Product Type
Laboratory Chemicals

Storage
Store at room temperature in tightly closed container, protect from light and moisture

Physical Form
Powder

Properties
pH indicator, sensitive to pH changes between 7.2 to 8.8

Shape
Crystalline powder

Solubility
Slightly soluble in water; soluble in alcohol

Structural Formula
See image or refer to literature

Appearance
Reddish brown to purple powder

Density
Gram per cubic centimeter(g/cm3)

Molecular Formula
C21H18O5S

Purity
99%

Shelf Life
36 months

Cresol Red Trade Information

Minimum Order Quantity
1 Kilograms

Supply Ability
1 Kilograms Per Week

Delivery Time
1 Week

About Cresol Red

Cresol Red

CAS No.	1733-12-16
Chemical Formula	C₂₁H₁₈O₅S
Molecular Weight	382.43
Melting Point	290 C
Dye Content	~95%
Transition Range	pH 0.5 - pH 1.8 Pink to Yellow pH 7.2 - pH 8.8 Yellow to Purple
Absorptivity(pH 0.5)517 - 520 nm	1180 - 1230
Absorptivity(pH 2.5)432-436 nm	490-540
Absorptivity(pH 6.5)432 - 436 nm	490 - 540
Absorptivity(pH 8.5)571 - 574 nm	1000 - 1050
Loss On Drying (110^oC.)	< 5%

Versatile Laboratory Application

Cresol Red serves as an essential pH indicator, particularly valued in analytical laboratories for its sensitivity within a pH range of 7.2 to 8.8. Commonly employed for monitoring pH shifts during titrations and as a tracking dye in gel electrophoresis, it provides reliable visual cues to researchers. Its crystalline, odorless composition ensures minimal interference in experimental setups, supporting precise and accurate results.

Safe Handling and Extended Shelf Life

To maintain its efficacy, Cresol Red should be stored at room temperature in closely sealed containers, protected from light and moisture. Proper storage conditions safeguard against decomposition, extending its usable life to up to 36 months. The products high purity (99%) and consistent physical form make it a dependable choice for ongoing laboratory needs. For full structural details, refer to scientific literature or available images.

FAQs of Cresol Red:

Q: How should Cresol Red be stored to maintain its quality?

A: Cresol Red should be stored at room temperature in a tightly closed container, protected from light and moisture. These conditions help prevent decomposition and prolong its shelf life to 36 months.

Q: What is the main benefit of using Cresol Red as a pH indicator?

A: The main advantage of Cresol Red is its sensitivity to pH changes between 7.2 and 8.8, making it ideal for monitoring near-neutral to slightly basic solutions during titrations and gel electrophoresis in laboratory settings.

Q: Where is Cresol Red commonly used?

A: Cresol Red is widely used in laboratories, particularly for titration processes and gel electrophoresis. It is primarily sourced from distributors, exporters, and manufacturers in India.

Q: When does Cresol Red change color, and how can this be used in the laboratory?

A: Cresol Red changes color within its pH sensitivity range (7.2 to 8.8). This property is utilized to visually detect pH changes during titrations or as a tracking agent in electrophoresis procedures.

Q: What is the physical appearance and form of Cresol Red?

A: Cresol Red appears as a reddish brown to purple crystalline powder. It is odorless and features a high purity level, making it suitable for precise analytical applications.

Q: How soluble is Cresol Red in water and alcohol?

A: Cresol Red is slightly soluble in water but dissolves more readily in alcohol, allowing flexibility in preparing indicator solutions based on laboratory requirements.

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