Structure via PubChem · Public domain (PubChem)
murexide
Sign in to saveMurexide (NH4C8H4N5O6, or C8H5N5O6·NH3), also called ammonium purpurate or MX, is the ammonium salt of purpuric acid. It is a purple solid that is soluble in water. The compound was once used as an indicator reagent. Aqueous solutions are yellow at low pH, reddish-purple in weakly acidic solutions, and blue-purple in alkaline solutions.
Chemical data
- Formula
- C8H8N6O6
- Molecular weight
- 284.19 g/mol
- IUPAC name
- azanium 2,4-dioxo-5-[(2,4,6-trioxo-1,3-diazinan-5-ylidene)amino]-1H-pyrimidin-6-olate
- SMILES
- C1(=C(NC(=O)NC1=O)[O-])N=C2C(=O)NC(=O)NC2=O.[NH4+]
- InChIKey
- LJYRLGOJYKPILZ-UHFFFAOYSA-N
- Polar surface area
- 170 Ų
- H-bond donors
- 5
- H-bond acceptors
- 7
- Formal charge
- 0
via PubChem
Research
165 papers- [The murexide reaction].Archiv der Pharmazie und Berichte der Deutschen Pharmazeutischen Gesellschaft · 1958
- Murexide-derived in vitro electrochemical sensor for the simultaneous determination of neurochemicals.Analytical and bioanalytical chemistry · 2021
- Murexide for determination of free and protein-bound calcium in model systems.Journal of dairy science · 1975
- Spectrofluorimetric determination of nickel (ΙΙ) with murexide.Journal of fluorescence · 2014
- Measurement of the Dissociation of Eu(II)-Containing Cryptates Using Murexide.Inorganic chemistry · 2020
via PubMed
Wikidata facts
- Mass
- 284.051
Show 3 more facts
- Commons category
- Murexide
- chemical formula
- C₈H₈N₆O₆
- canonical SMILES
- N.O=C1N=C(O)C(=Nc2c(O)nc(O)nc2O)C(O)=N1
Sources (1)
via Wikidata · CC0
~2 min read
Article
4 sectionsContents
- Preparation
- History
- Use
- References
Murexide (NH4C8H4N5O6, or C8H5N5O6·NH3), also called ammonium purpurate or MX, is the ammonium salt of purpuric acid. It is a purple solid that is soluble in water. The compound was once used as an indicator reagent. Aqueous solutions are yellow at low pH, reddish-purple in weakly acidic solutions, and blue-purple in alkaline solutions.
==Preparation== Murexide is prepared by treating alloxantin with ammonia to 100 °C, or by treating uramil (5-aminobarbituric acid) with mercury oxide. It may also be prepared by digesting alloxan with alcoholic ammonia.