Factory Supply Sulfanilic Acid CAS 121-57-3 with Low Price
| Melting point | >300 °C(lit.) |
| Boiling point | 288 ºC |
| density | 1.485 |
| vapor pressure | 0Pa at 25ºC |
| refractive index | 1.5500 (estimate) |
| storage temp. | Store below +30°C. |
| solubility | 10g/l |
| pka | 3.24(at 25ºC) |
| form | solid |
Usage:
As the compound readily form diazo compounds, it is used to make dyes and sulpha drugs . This property is also used for the quantitative analysis of nitrate and nitrite ions by diazonium coupling reaction with N-(1-Naphthyl) ethylene diamine , resulting in an azo dye, and the concentration of nitrate or nitrite ions were deduced from the color intensity of the resulting red solution by colorimetry.
It is also used as a standard in combustion analysis.
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