Phenol Red
Phenol Red (CAS: 143-74-8) is a sulfonphthalein dye and pH indicator with the chemical formula C19H14O5S and a molecular weight of 354.38 g/mol. It exhibits a distinct colour change within the pH range of 6.8 to 8.2, transitioning from yellow to red. This property makes it invaluable in various laboratory applications, particularly for monitoring pH in biological and chemical systems, and as a component in cell culture media.
- IUPAC
- Phenolsulfonphthalein
- Synonyms
- Phenolsulfonphthalein
pH Indicator
Phenol Red serves as a widely used pH indicator due to its distinct colour transition in the slightly alkaline range. It is ideal for visual pH determination in titrations and buffer solutions.
Cell Culture Media Component
Incorporated into cell culture media, Phenol Red allows for visual monitoring of the culture's pH. Changes in colour can indicate metabolic activity or contamination, aiding in maintaining optimal growth conditions for cells.
Diagnostic Reagent
This compound is utilised in certain diagnostic tests and assays where precise pH monitoring is crucial for accurate results, particularly in areas like cell biology research.
| Molecular weight | 354.38 |
|---|---|
| Empirical formula | C19H14O5S |
| Form | powder |
| Concentration | 2,000 × |
| Storage temperature | 2-8°C |
| Application | Suitable for use as a pH indicator. |
Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Product Line | BioReagent |
|---|---|
| Synonym | 6.8 - 8.2, yellow to red |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Phenol Red primarily used for?
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Phenol Red (CAS: 143-74-8) is primarily used as a pH indicator, showing a colour change from yellow to red between pH 6.8 and 8.2. It is also a common component in cell culture media for visual pH monitoring.
What are the CAS number and chemical formula for Phenol Red?
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The CAS number for Phenol Red is 143-74-8, and its chemical formula is C19H14O5S.
What grade and purity does Tech Serve Solutions supply for Phenol Red?
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Tech Serve Solutions supplies Phenol Red as a BioReagent, in powder form. Specific purity assays are detailed on the product's Certificate of Analysis. TSS does not represent this product as USP, BP, EP, or pharmacopoeia grade unless explicitly stated in the product specifications.
What are the safety and handling precautions for Phenol Red?
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Phenol Red is classified with GHS07 symbol and a 'Warning' signal word. It carries hazard statements H315 (causes skin irritation), H319 (causes serious eye irritation), and H335 (may cause respiratory irritation). Appropriate personal protective equipment, including a dust mask (N95), eyeshields, and gloves, is recommended. Handle in a well-ventilated area.
How is Phenol Red packed, shipped, and exported?
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Phenol Red is typically supplied as a powder and handled according to its safety data sheet. Tech Serve Solutions is an experienced global supplier and exporter of fine chemicals, ensuring compliant packaging and shipping.
How can I request a quote or sample for Phenol Red?
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To request a quote or sample for Phenol Red, please contact our sales team through the website or call us directly. Provide the product name and CAS number (143-74-8) for prompt service.
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