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1.07998

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

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

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

Synonym(s):

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

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About This Item

Empirical Formula (Hill Notation):

C₁₆H₉N₂Na₃O₁₁S₃

CAS Number:

23647-14-5

Molecular Weight:

570.41

UNSPSC Code:

12352107

EC Index Number:

245-803-9

NACRES:

NB.21

MDL number:

MFCD00003952

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Properties

Quality Segment

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

SMILES string

[Na+].[Na+].[Na+].[S](=O)(=O)([O-])c1ccc(cc1)N\N=C2\C(=Cc3c(c(cc(c3)[S](=O)(=O)[O-])[O-])C\2=O)[S](=O)(=O)O

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 %

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c