Yuasa, Makoto published the artcileSynergistic effect of organic additives and pulse-current plating in a gold electrodeposition acid bath and gold plating film corrosion resistance, Product Details of C5H5NO3S, the publication is Hyomen Gijutsu (1994), 45(8), 842-3, database is CAplus.
Effects of addition of pyridine derivatives such as aminopyridines and pyridinesulfonic acids into a citric acid-base Au electrodeposition solution were discussed. Using both pyridine additives and pulse current effectively lowered porosity and increased deposition efficiency compared to using only d.c. or pulse current and both d.c. and pyridine additives.
Hyomen Gijutsu published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C15H20N2O2, Product Details of C5H5NO3S.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem