Loading AI tools
Chemical compound From Wikipedia, the free encyclopedia
Nitrazine or phenaphthazine is a pH indicator dye often used in medicine. More sensitive than litmus, nitrazine indicates pH in the range of 4.5 to 7.5. Nitrazine is usually used as the disodium salt.
Names | |
---|---|
IUPAC name
(3E)-3-[(2,4-Dinitrophenyl)hydrazono]-4-oxonaphthalene-2,7-disulfonic acid | |
Other names
Nitrazine yellow; Phenaphthazine | |
Identifiers | |
3D model (JSmol) |
|
ChemSpider | |
PubChem CID |
|
UNII |
|
| |
| |
Properties | |
C16H10N4O11S2 | |
Molar mass | 498.40 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Nitrazine (pH indicator) | ||
below pH 4.5 | above pH 7.5 | |
4.5 | ⇌ | 7.5 |
This test, however, can produce false positives. If blood gets in the sample or if there is an infection present, the pH of the vaginal fluid may be higher than normal. Semen also has a higher pH, so recent vaginal intercourse can produce a false reading.
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.