1.01922

3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate

metal indicator

• Synonym(s): 3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate, 1,2-Dihydroxy-3,5-benzenedisulfonic acid disodium salt, di-Sodium 4,5-dihydroxy-1,3-benzenedisulfonate, Sodium pyrocatechol-3,5-disulfonate, Tiron
• Empirical Formula (Hill Notation): C₆H₄Na₂O₈S₂ · xH₂O
• CAS Number: 149-45-1
• Molecular Weight: 314.20 (anhydrous basis)
• UNSPSC Code: 12352107
• EC Index Number: 205-741-5
• NACRES: NA.21

Properties

• product name: 3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate, (Tiron) metal indicator
• Quality Level: 200
• form: solid
• composition: Water, 4.5-6.5% Karl Fischer
• pH: 5.0 (20 °C, 10 g/L in H₂O)
• mp: 300 °C
• solubility: 1350 g/L
• bulk density: 465 kg/m³
• λmax: 290-291 nm (buffer pH 2.5)
• storage temp.: 15-25°C
• InChI: 1S/C6H6O8S2.2Na/c7-4-1-3(15(9,10)11)2-5(6(4)8)16(12,13)14;;/h1-2,7-8H,(H,9,10,11)(H,12,13,14);;/q;2*+1/p-2
• InChI key: ISWQCIVKKSOKNN-UHFFFAOYSA-L

Description

application

• The oxidative degradation of Calmagite using added and in situ generated hydrogen peroxide catalysed by manganese(II) ions: A study evaluating the efficacy and degradation pathways in environmental testing, highlighting potential applications of similar compounds like 3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate in waste management and pollutant analysis (Cao Y, Sheriff TS, 2022).
• Synthesis of conformationally restricted acidic lipids: Discusses techniques that could be utilized in the synthesis and analysis of structurally similar compounds like 3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate, enhancing understanding in material science and biomedical research (Rakitzis ET et al., 1978).

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (buffer pH 2.5): 290 - 291 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.05 g/l; buffer pH 2.5; calculated on anhydrous substance): 100 - 125
Water (according to Karl Fischer): 4.5 - 6.5 %
Suitability as indicator (for metal titration): passes test

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H315 - H319
• pcodes: P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3