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  • 1.07998 - 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6- disulfonic acid trisodium salt

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1.07998 Supelco

1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6- disulfonic acid trisodium salt

GR for analysis (reagent for fluoride, zirconium, thorium)

Synonym: 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6- disulfonic acid trisodium salt, SPADNS

  • CAS Number 23647-14-5

  • Empirical Formula (Hill Notation) C16H9N2Na3O11S3

  • Molecular Weight 570.41

  •  MDL number MFCD00003952

  •  EC Index Number 245-803-9

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Properties

Quality Level   100
pH   6.0 (22 °C, 10 g/L in H2O)
solubility   220 g/L
bulk density   810 kg/m3
InChI   1S/C16H12N2O11S3.3Na/c19-12-7-11(31(24,25)26)5-8-6-13(32(27,28)29)15(16(20)14(8)12)18-17-9-1-3-10(4-2-9)30(21,22)23;;;/h1-7,17,19H,(H,21,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b18-15-;;;
InChI key   LSAWBVPBZOEGOT-ZOVWSQMSSA-K
storage conditions   Store at +15°C to +25°C.

Description

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Color change with zirconium: passes testpink - violet
Absorption maximum λmax. (buffer pH 7.0): 505 - 510 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.02 g/l; buffer pH 7.0; calc. on dried substance): 400 - 560
Loss on Drying (105°C): ≤ 10 %

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