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222461

Sigma-Aldrich

Murexide

ACS reagent

Synonym(s):

5,5′-Nitrilodibarbituric acid monoammonium salt, Ammonium purpurate

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About This Item

Empirical Formula (Hill Notation):
C8H8N6O6
CAS Number:
3051-09-0
Molecular Weight:
284.19
Colour Index Number:
56085
Beilstein:
3831445
EC Number:
221-266-6
MDL number:
MFCD00012777
UNSPSC Code:
12171500
PubChem Substance ID:
24853333
NACRES:
NA.47

grade

ACS reagent

Quality Level

200

form

powder

technique(s)

titration: suitable

mp

>300 °C (lit.)

λmax

525 nm

suitability

passes test for complexometric indicator

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

N.OC1=C(\N=C2\C(=O)NC(=O)NC2=O)C(=O)NC(=O)N1

InChI

1S/C8H5N5O6.H3N/c14-3-1(4(15)11-7(18)10-3)9-2-5(16)12-8(19)13-6(2)17;/h(H2,10,11,14,15,18)(H3,12,13,16,17,19);1H3

InChI key

LJYRLGOJYKPILZ-UHFFFAOYSA-N

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General description

Murexide is the ammonium salt of purpuric acid that appears as a slightly reddish-purple powder and is soluble in water. It is mainly used as an indicator for complexometric titrations to measure water hardness and as a colorant/pigment in the dye industry.

Application

Murexide is used for the histochemical staining of calcium in the skeleton. It is suitable for staining the hemijaws for dental caries scoring.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM1568
BCCL1516
BCCH6887
BCCF9241
BCCF0688

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M Ghaedi et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 83(1), 46-51 (2011-09-10)
In the first, Cadmium selenide Nanoparticle loaded on activated carbon (CdSe-NP-AC) has been synthesized and characterized by different techniques including XRD and SEM. Then, this new adsorbent successfully has been applied for the removal of muroxide (MO) from aqueous solution
F D Coffman et al.
Biochemistry, 27(16), 6179-6187 (1988-08-09)
An insulin hexamer containing one B10-bound Co(III) ion and one unoccupied B10 site has been synthesized. The properties of the monosubstituted hexamer show that occupancy of only one B10 site by Co3+ is sufficient to stabilize the hexameric form under
A Hirota et al.
The Journal of general physiology, 94(4), 597-631 (1989-10-01)
Two new Ca indicators, purpurate-3,3'diacetic acid (PDAA) and 1,1'-dimethylpurpurate-3,3'diacetic acid (DMPDAA), were synthesized and used to measure Ca transients in frog cut muscle fibers. These indicators are analogues of the purpurate components of murexide and tetramethylmurexide, in which two acetate
R De Giovanni et al.
Physiological chemistry and physics and medical NMR, 24(4), 271-280 (1992-01-01)
In this paper the authors studied the effects of thyroid hormones and their structural analogues on the mitochondrial calcium transport activities. The thyroid hormones, 3,5,3' L-triiodothyronine (LT3) and 3,5,3'5' L-tetraiodothyronine (LT4) at physiological intracellular concentrations between 7.2 and 9 nM
Muberra Andac et al.
Journal of fluorescence, 17(4), 401-405 (2007-04-26)
A highly sensitive flow-injection spectrofluorimetric method is presented for the rapid and simple determination of Hg (II) in environmental and pharmaceutical samples. Murexide (ammonium purpurate) was used as the fluorescence reagent in the carrier stream. An emission peak of murexide
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