Fast Sulphon Black F

Fast Sulphon Black F is a complexometric indicator used with EDTA, almost exclusively used in copper complexation determination.

Fast Sulphon Black F
Names
IUPAC name
1-hydroxy-8-(2-hydroxy-1-naphthylazo)-2-(4-sulfo-1-naphthylazo)-naphthalene-3,6-disulfonic acid
Other names
Fast Sulphon Black
Identifiers
3D model (JSmol)
ECHA InfoCard 100.020.879
EC Number
  • 222-966-4
  • InChI=1S/C30H20N4O11S3/c35-24-11-9-16-5-1-2-6-19(16)28(24)33-32-23-15-18(46(37,38)39)13-17-14-26(48(43,44)45)29(30(36)27(17)23)34-31-22-10-12-25(47(40,41)42)21-8-4-3-7-20(21)22/h1-15,35-36H,(H,37,38,39)(H,40,41,42)(H,43,44,45)
    Key: WQWKYALNLSYERE-UHFFFAOYSA-N
  • c1ccc2c(c1)ccc(c2/N=N/c3cc(cc4c3c(c(c(c4)S(=O)(=O)O)/N=N/c5ccc(c6c5cccc6)S(=O)(=O)O)O)S(=O)(=O)O)O
Properties
C30H20N4O11S3
Molar mass 708.695
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Application

Fast Sulphon Black is purple when complexed with copper, and turns green when titrated against EDTA,[1] as the EDTA displaces it, being the better complexing agent due to the chelate effect.

References
  1. Trimukhe, K.D.; Varma, A.J. (2008). "Complexation of heavy metals by crosslinked chitin and its deacetylated derivatives". Carbohydrate Polymers. 71 (1): 66–73. doi:10.1016/j.carbpol.2007.05.016.
  • Handbook of copper compounds and applications by H. Wayne Richardson (1997) (ISBN 0-82-478998-9)


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