222461

Murexide

ACS reagent

• Synonym(s): 5,5′-Nitrilodibarbituric acid monoammonium salt, Ammonium purpurate
• 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

Properties

• 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

Description

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.

Safety Information

• 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