Xylenol orange
| Xylenol orange | |
|---|---|
 |
|
|
3,3′-Bis[N,N-bis(carboxymethyl)aminomethyl]-o- |
|
| Identifiers | |
| CAS number | 1611-35-4  , 3618-43-7 (tetrasodium salt) |
| PubChem | 73041 |
| ChemSpider | 65838 |
| EC-number | 216-553-8 |
| Jmol-3D images | Image 1 |
|
|
|
|
| Properties | |
| Molecular formula | C31H32N2O13S |
| Molar mass | 672.67 g/mol |
| Melting point |
195 °C (368 K) |
| Solubility in water | 200 mg/mL |
| Hazards | |
| EU Index | not listed |
| R-phrases | R10, R20, R21, R22, R36, R38 |
| S-phrases | (S1/2), S26, S27, S28, S62, S63 |
| NFPA 704 |
 1
2
2
|
| Flash point | Greater than 93 °C (200 °F) |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
| Infobox references | |
Xylenol orange is an organic reagent, most commonly used as a tetrasodium salt as an indicator for metal titrations. When used for metal titrations it will appear red in the titrand and yellow once it reaches its endpoint. Historically, commercial preparations of it have been notoriously impure,[1] sometimes consisting of as little as 20% xylenol orange, and containing large amounts of semi-xylenol orange and iminodiacetic acid. Purities as high as 90% are now available.
References [edit]
- ^ Gay, Craig; Collins, James; Gebicki, Janusz M. (1999), "Determination of Iron in Solutions with the Ferric–Xylenol Orange Complex", Analytical Biochemistry 273 (2): 143–148, doi:10.1006/abio.1999.4207
 |
This article about an organic compound is a stub. You can help Wikipedia by expanding it. |
