Haloperiodol oral liquid

Charge approximately 700 mL of water into a suitable mixing tank. Add and dissolve lactic acid with stirring while mixing, add haloperiodol. Mix until complete solution (approximately 15 minutes). 

Charge 240 mL of water into a separate container and heat to boiling. Add and dissolve methyl and propyl parabens. Mix until complete solution. Add this solution to step 1 solution. 

Check pH. If necessary, adjust to pH 2.75 (range 2.5 to 3) with 2% sodium hydroxide. Continue mixing for 10 minutes after addition of sodium hydroxide. Record pH and amount of sodium hydroxide added. Lactic acid ( 8) may also be used to adjust pH. 

Filter solution through 8-micron membrane filter (or similar) into a suitable container, under nitrogen protection. 

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