Muriatic acid 31.35% same as 31.45% - 20º Baume?

[AviatorBimmer]

I was sold a gallon of Muriatic Acid at my local mom and pop pool store and it says on the label MURIATIC ACID HYDROCHLORIC ACID 31.45%

When I go to Pool Math, the only 31.45% reference it makes does not say muriatic acid but "31.35% same as 31.45% - 20º Baume".

The only options that say Muriatic Acid are only for 14.5% and 29%.
I'm somewhat confused on which option to choose so I can add the correct amount Pool Math suggests.

 

[JamesW]

It's the same thing. Probably just a typo.

 

[mknauss]

Not enough room to include the 31.45%, 20 Baume, and Muriatic Acid in one drop down selection in the app. So they left out Muriatic Acid.

 

[AviatorBimmer]

Sweet! Thanks to you both.