1.07998

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

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

• Synonym(s): 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6- disulfonic acid trisodium salt, SPADNS
• Empirical Formula (Hill Notation): C₁₆H₉N₂Na₃O₁₁S₃
• CAS Number: 23647-14-5
• Molecular Weight: 570.41
• MDL number: MFCD00003952
• UNSPSC Code: 12352107
• EC Index Number: 245-803-9

Properties

• Quality Level: 100
• pH: 6.0 (22 °C, 10 g/L in H₂O)
• solubility: 220 g/L
• bulk density: 810 kg/m³
• storage temp.: 15-25°C
• 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

Description

Analysis Note

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

Safety Information

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