1.06161

Murexide

(ammonium purpurate) metal indicator ACS

• Synonym(s): Murexide, Ammonium purpurate, acid
• Empirical Formula (Hill Notation): C₈H₈N₆O₆
• CAS Number: 3051-09-0
• Molecular Weight: 284.19
• MDL number: MFCD00012777
• UNSPSC Code: 12352107
• EC Index Number: 221-266-6

Properties

• grade: ACS reagent
• Quality Level: 200
• form: solid
• loss: ≤2.0% loss on drying, 105°C
• pH: 5 (20 °C, 1 g/L in H₂O)
• solubility: 1 g/L
• bulk density: 330 kg/m³
• Amax: 520-524 nm in water
• storage temp.: 2-30°C
• InChI: 1S/C8H4N5O6.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)(H2,12,13,16,17,19);1H3/q-1;/p+1
• InChI key: PCCZWUCAYILEMX-UHFFFAOYSA-O

Description

Linkage

Replaces: MX1665-3; MX1665

Analysis Note

Identity (IR-spectrum): passes test
Identity (UV/VIS-Spectrum): passes test
Absorption maximum (water): 520 - 524 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.01 g/l; water): ≥ 300
Sulfated ash (800 °C): ≤ 1.0 %
Loss on Drying (105°C): ≤ 2.0 %
Suitability as indicator (for metal titration): passes test

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable