Chromoionophore I
Chromoionophore I (CAS: 125829-24-5), a benzophenoxazine derivative with the molecular formula C38H53N3O2 and a molecular weight of 583.85 g/mol, serves as a crucial fluorescent indicator. It is primarily utilised in the development of ion-selective electrodes and optodes for the detection of potassium (K <sup>+</sup> ) and calcium (Ca <sup>2+</sup> ) ion activity. Its fluorescent properties are essential for quantitative analysis in various biochemical and analytical applications.
- IUPAC
- 3-Octadecanoylimino-7-(diethylamino)-1,2-benzophenoxazine,9-(Diethylamino)-5-(octadecanoylimino)-5H-benzo[a]phenoxazine,N-Octadecanoyl-Nile blue,ETH 5294
- Synonyms
- ETH 5294N-Octadecanoyl-Nile blue3-Octadecanoylimino-7-(diethylamino)-1,2-benzophenoxazine9-(Diethylamino)-5-(octadecanoylimino)-5H-benzo[a]phenoxazine

Potassium and Calcium Ion Sensing
Chromoionophore I is employed in the construction of solvent polymeric optode membranes for assaying the activity of K <sup>+</sup> and Ca <sup>2+</sup> . It functions as a key component in ion-selective sensors, enabling precise electrochemical measurements.
Fluorescent Indicator Development
As a fluorescent probe, Chromoionophore I facilitates the development of advanced analytical tools. Its fluorescence characteristics, with excitation at 614 nm and emission at 663 nm when protonated, are critical for detecting ion concentrations.
Biochemical and Analytical Assays
This compound is valuable in biochemical research and analytical chemistry, contributing to assays that require sensitive detection of specific cations. Its use as a chromoionophore aids in various quantitative studies.
| Molecular weight | 583.85 |
|---|---|
| Empirical formula | C38H53N3O2 |
| Grade | Selectophore™ |
| Application | Assay of K+ and of Ca2+ activity with solvent polymeric optode membrane based on ETH 5294 and potassium ionophore I (valinomycin) |
| Melting point | 91-93 °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.
| Fluorescence | λex 614 nm; λem 663 nm (protonated) |
|---|
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 Chromoionophore I used for?
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Chromoionophore I is used as a fluorescent indicator and probe, particularly for the assay of K <sup>+</sup> and Ca <sup>2+</sup> activity in solvent polymeric optode membranes. It is also applied in general biochemical and analytical assays requiring sensitive cation detection.
What is the CAS number and molecular formula for Chromoionophore I?
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The CAS number for Chromoionophore I is 125829-24-5, and its molecular formula is C38H53N3O2.
What grade and purity does Tech Serve Solutions supply for Chromoionophore I?
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Tech Serve Solutions supplies Chromoionophore I in Selectophore™ grade. We do not represent this product as meeting USP, BP, EP, or other pharmacopoeia standards.
How should Chromoionophore I be handled safely?
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When handling Chromoionophore I, it is essential to wear safety eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used if airborne exposure is possible. The substance is classified with a WGK of 3 in Germany, indicating a hazard to water.
Is Chromoionophore I controlled or scheduled?
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The provided data does not indicate that Chromoionophore I is a controlled or scheduled substance.
How can I request a quote or sample for Chromoionophore I?
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To request a quote or a sample of Chromoionophore I, please contact the Tech Serve Solutions sales team through our website or by phone.
How is Chromoionophore I packed and shipped?
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Chromoionophore I is carefully packed and exported by Tech Serve Solutions according to standard chemical handling and shipping regulations to ensure product integrity and safety during transit.
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