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3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate

(Tiron) metal indicator

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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

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

Related Categories

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 λmax. (buffer pH 2.5): 290 - 291 nm
Spec. Absorptivity A 1%/1cm (λmax; 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

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315 - H319

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Certificates of Analysis (COA)

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