1.06595

Rhodizonic acid disodium salt

indicator for sulfate titration

• Synonym(s): Rhodizonic acid disodium salt, 1,2-Dihydroxy-3,4,5,6-tetraoxo-1-cyclohexene disodium salt, Sodium rhodizonate
• Empirical Formula (Hill Notation): C₆Na₂O₆
• CAS Number: 523-21-7
• Molecular Weight: 214.04
• EC Index Number: 208-340-3
• UNSPSC Code: 12352107
• MDL number: MFCD00001650
• Form: solid

Properties

• Quality Segment: 100
• form: solid
• mp: >300 °C
• bulk density: 620 kg/m³
• storage temp.: 15-25°C
• InChI: 1S/C6O6.2Na/c7-1-2(8)4(10)6(12)5(11)3(1)9;;/q-2;2*+1
• InChI key: WNLGVLVRNGQRFD-UHFFFAOYSA-N

Description

Analysis Note

Assay (perchloric acid titration): ≥ 98.5 %
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max.(Hydrochloric acid 0.1 mol/l): 317 - 320 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.02 g/l; hydrochloric acid 0.1 mol/l): ≥ 540
Suitability as indicator (for sulfate titration): passes test

Safety Information

• Storage Class: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable