yellow colored muriatic acid

[central nj]

Hi, I've been using muriatic acid from the hardward store--31% or something like that. It has always been clear. The last bottle I bought, same packaging, same look, has a significant yellow hue to it. Still seems to work. Is this of concern? I wonder what is the cause?

Thanks

 

[techguy]

To my knowledge, all of the full strength MA is yellow in color. Did you get a "safer" MA last time?

 

[central nj]

Well, I ran through the yellow stuff, and the new bottle contents are clear. It was the same packaging. It seemed to work the same.