Murexide Chemical Properties

Melting point:

300 °C

Boiling point:

443.25°C (rough estimate)

Density 

1.5756 (rough estimate)

refractive index 

1.8000 (estimate)

storage temp. 

no restrictions.

solubility 

1g/l

Colour Index 

56085

pka

pK1:0.0;pK2:9.20;pK3:10.50 (25°C)

form 

Solid

color 

Reddish-violet

PH

5 (1g/l, H2O, 20℃)

Odor

Odorless

Water Solubility 

Slightly soluble

Merck 

14,6306

BRN 

3582175

InChIKey

HZRQHQKDQSVFMQ-UHFFFAOYSA-N

NIST Chemistry Reference

Ammonium purpurate(3051-09-0)

EPA Substance Registry System

2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-[(hexahydro-2,4,6-trioxo-5-pyrimidinyl)imino]-, monoammonium salt (3051-09-0)

Safety Information

Hazard Codes 

Xn

Risk Statements 

22-40

Safety Statements 

24/25-22-36/37

WGK Germany 

3

TSCA 

Yes

HS Code 

29335995

MSDS

• Language:English Provider:Ammonium purpurate
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Murexide Usage And Synthesis

Chemical Properties

Bordeaux powder

Uses

Murexide is used as a complexometric indicator in analytical chemistry for complexometric titrations of calcium, copper nickel and cobalt. It is an inhibitor of dihydrofolate reductase. Further, it acts as an enhancer of sonochemical destruction of chlorinated hydrocarbon pollutants.

Uses

Indicator for complexometric titrations.

Purification Methods

The sample may be grossly contaminated with uramil, alloxanthine, etc., and may be difficult to purify. It is better to synthesise it from pure alloxanthine [Davidson J Am Chem Soc 58 1821 1936]. Recrystallise it from water. [Kuhn & Lyman Chem Ber 69 1547 1936, Beilstein 25 I 709, 25 III/IV 4236.]

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