GUARANTEED CONCLUSION:

"Meets the U. S. P. 14 requirements for distilled water, sterile distilled water and water for injection"

•INDEPENDENT LABORATORY

J u l y 2 1 , 1955 Prec i s ion S c i e n t i f i c Company No. 44425 3737 West Cort land S t r e e t U.S.P. - 14 Chicago 4 7 , I l l i n o i s Gentlemen:

REPORT SUBJECT: Examination of wate r produced i n our

l a b o r a t o r i e s by d i s t i l l i n g Chicago c i t y water w i t h your Prec i s ion "S t reaml ine r" Labora tory Water S t i l l .

Chemical Examination P a r t s pe r m i l l i o n Tota l s o l i d s 1.00 S i l i c a - Si02 O.066 Iron and alumina — Fe2034Al203 Trace Calcium - Ca O.07 Magnesium - Mg No weighable t r a c e Sodium and Potassium Less than 0.10 Su l fa t e No weighable t r a c e Chloride Less than 0.10 A l k a l i n i t y as ca rbona te . .Less than 0.10

This water passes the following U. S. P. t e s t s l i s t e d under D i s t i l l e d Water and t h e r e f o r e meets t h i s s p e c i f i c a t i o n in i t s e n t i r e t y :

Appearance Ammonia Color Calcium Odor Carbon Dioxide Taste Heavy Metals Reaction Tota l s o l i d s (see a l so above) Chloride Pyrogen-free Su l fa te Conductivity T e s t : 3 . 5 Micromhos

*NAME SUPPLIED UPON REQUEST

SINGLE DISTILLATION PRODUCES WATER FIT FOR INJECTION This independent laboratory report on the

distillate of a Precision "Streamliner'* Water Still clearly shows the results to be expected from the entire line of Precision Water Stills.

P E R F O R M A N C E OVER T H E YEARS Experience over the years has proved that water stills by Precision produce a purer distillate in more volume with less attention at lower cost. In

operation, they meet all U.S.P. standards, pro­duce pyrogen-free water and reduce total solids t o 1 part per million!

F R O M A TRICKLE TO A TORRENT All Precision models are hard water stills. Your

capacity requirements from 100 to lA (gallons per h o u r ) CAN BE DELIVERED FROM STOCK IN MOST MODELS.

A new brochure covering all models of Precision Water Stills,

Storage Tanks and Accessories is available. Why not -write for it today!

Precision Scientific Company 3727 W E S T C O R T L A N D S T R E E T • CHICAGO AT

OCT. 2 4, 19 55 C&EN 4 4 9 9