This British Standard specifies the limits for impurities in sulfuric acid suitable for use in lead-acid batteries and details procedures for the determination of those impurities.
This edition covers sulfuric acid of any relative density.
NOTE. This is a matter for agreement between purchaser and supplier. Clauses and relevant appendices are worded accordingly.
All of the numerical limits refer to sulfuric acid of relative density 1.215 at 20 ℃. Conversions to 100 % and other commonly used acid bases are given in annex K. Useful tables relating density to percentage composition will be found in BS 753 .