o-Cresolphthalein
o-Cresolphthalein (CAS: 596-27-0; C22H18O4) is a high-quality indicator compound supplied by Tech Serve Solutions. With a molecular weight of 346.38 g/mol, it is primarily utilised as a pH indicator in analytical chemistry. Its distinct colour change within a specific pH range makes it valuable for titration and other chemical analyses where precise pH monitoring is crucial.
pH Indication
o-Cresolphthalein functions as a visual indicator, undergoing a colour transition from colorless to red between pH 8.2 and 9.8. This characteristic makes it suitable for acid-base titrations where the endpoint falls within this alkaline range.
Analytical Reagent
As an indicator grade chemical, o-Cresolphthalein is employed in various laboratory procedures. It aids in determining the endpoint of chemical reactions and is a valuable tool in general analytical chemistry.
Histology and Cell Biology Staining
While primarily a pH indicator, o-Cresolphthalein may also find application as a component in certain staining solutions within histology and cell biology, owing to its chromophoric properties.
| Molecular weight | 346.38 |
|---|---|
| Empirical formula | C22H18O4 |
| Grade | indicator grade |
| Melting point | 219-221 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 381 nm (2nd)λmax 566 nm |
|---|---|
| Ph Range | 8.2 - 9.8, colorless 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 o-Cresolphthalein used for?
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o-Cresolphthalein is primarily used as a pH indicator, particularly in titrations, transitioning from colorless to red in the pH range of 8.2–9.8. It also finds use as an analytical reagent and in certain staining applications within histology and cell biology.
What are the CAS number and formula for o-Cresolphthalein?
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The CAS number for o-Cresolphthalein is 596-27-0, and its molecular formula is C22H18O4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies o-Cresolphthalein in indicator grade. We do not represent this product as USP, BP, EP, or pharmacopoeia grade unless explicitly stated.
How should o-Cresolphthalein be handled?
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Handle o-Cresolphthalein with appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter may be necessary. Refer to the Safety Data Sheet for comprehensive handling and safety information.
How is o-Cresolphthalein packed and shipped?
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o-Cresolphthalein is carefully packed to ensure safe transit and is available for global export by Tech Serve Solutions.
How can I request a sample or quote for o-Cresolphthalein?
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To request a sample or quote for o-Cresolphthalein, please contact our sales team through the website or by phone.
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