222461
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:
Molecular Weight:
284.19
EC Number:
221-266-6
UNSPSC Code:
12171500
NACRES:
NA.47
PubChem Substance ID:
MDL number:
Colour Index Number:
56085
Beilstein/REAXYS Number:
3831445
grade
ACS reagent
Quality Segment
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
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.
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Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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