Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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HCl Muratic Acid
2007
I need HCI Muriatic Acid for the refining of Gold. It needs to be 31.45% technical grade. I found it at a ACE hardware store with same % but it does not say technical strength. Is this the right stuff or does it need to say "technical strength".
Ronald G CaseyHome - Waynesville, North Carolina
31.45 wt% is the minimum concentration of Technical Grade HCl per Federal Specification O-H-765E. Probably all HCl produced in the US meets or exceeds Technical grade (the cheap stuff) specifications, so you're OK. Purer grades (Reagent, Electronic, Spectroscopic) available from chemical & lab supply companies are about the same acidity (32-36 wt%) but have lower impurity levels and cost more.
Ken Vlach [deceased]- Goleta, California
Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.
2007
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