PURITY
D R O P BY DROP, distillate volume against temperature forms the flat plot that charac terizes an organic compound of high purity. Narrow boiling range and sharp melting are indications* of purity, not proofs. Nowhere is there greater awareness than at Eastman that these data alone do not convey the whole story. Attainment and proof of purity depend on a broad understanding of many preparation methods and of all analytical technics . . . under standing that Eastman has ac cumulated in maintaining the world's most complete stock of research chemicals for labora tories everywhere.
*As minimum indication o f purity, melting or boiling range determinations a r e g i v e n f o r the g r e a t m a j o r i t y of listings in the c a t a l o g of Eastman Organic Chem icals. There is no charge f o r this reference book.
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E A S T M A N K O D A K C O M P A N Y , R o c h e s t e r 4 , Ν . Υ. Organic
KODAK
ΊΓItMilt Κ AMIE VO LUME
2 6,
SOME
NO.
3 9 »
3000
SEPTEMBER
2 7,
194!
EASTMAX
Chemical
OH4;.\Xt4
Sales
Division
CHEMMCAES 2901
