inerted 200 l reactor is charged with 1 8 kg crude substantially pure tin mesoporphyrin formed via steps 1 and 2 and 31 kg wfi water for injection with moderate agitation at 20 25 u00b0 c the reactor is charged with 2 4 kg 28 ammonium hydroxide the resultant solution is agitated at 20 25 u00b0 c for 30 minutes prior to testing ph to ensure that it is greater than 9 if not additional ammonium hydroxide is added in small portions until this ph level is achieved to the resultant solution is charged 0 1 kg darco kb activated carbon and 0 2 kg hyflo supercel suspended in 2 3 kg purified water with moderate agitation the suspension is agitated at 20 25 u00b0 c for a minimum of 30 minutes the suspension is filtered through a sparkler filter to remove solids leaving a filtrate the filter cake is rinsed with 13 kg purified water an inerted 200 l reactor is charged with 69 3 kg acetic acid and 3 1 kg 31 hydrochloric acid with moderate agitation under nitrogen while maintaining a temperature of 20 25 u00b0 c the filtrate is added to the acetic acid hcl solution over a minimum of 45 minutes the resultant suspension is agitated for 15 minutes at 20 25 u00b0 c prior to testing the ph level to ensure that the final ph is about less than or equal to 1 if not additional hydrochloric acid is added in small portions until this ph level is.