3-Mercapto-1-propanesulfonic acid

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3-Mercapto-1-propanesulfonic acid
Skeletal formula
Ball-and-stick model
Preferred IUPAC name
3-Sulfanylpropane-1-sulfonic acid
Other names
3-Mercaptopropane-1-sulfonic acid (no longer recommended[1])
3-Mercaptopropanesulphonic acid
3D model (JSmol)
ECHA InfoCard 100.051.249
Molar mass 156.21 g·mol−1
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

3-Mercapto-1-propanesulfonic acid is a chemical compound often used as a brightener in copper electroplating.[2]


  1. ^ Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 697. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4. The prefixes ‘mercapto’ (–SH), and ‘hydroseleno’ or selenyl (–SeH), etc. are no longer recommended. 
  2. ^ Dow, Wei-Ping; Her-Shu Huang; Zack Lin (2003-06-30). "Interactions Between Brightener and Chloride Ions on Copper Electroplating for Laser-Drilled Via-Hole Filling". Electrochemical and Solid State Letters. The Electrochemical Society. 6 (9): 134–136. doi:10.1149/1.1595311. Retrieved 2009-08-14.