Eastman Organic Chemicals

V O L U M E 23, NO. 1, J A N U A R Y

23 A

1951

An informative label makes your work easier... When you pick up an Eastman Organic Chemical bottle these days, you see a new label that gives the structural formula and the formula weight. We're pretty sure you'll find it helpful in eliminat­ ing the confusion over identity and position of groupings that often arises from variations in nomenclature. It should also save you the time required to look up or calculate molecular weight. A white label indicates "Eastman" grade, the highest in purity. Yellow means "Practical" grade, sufficient in purity for most lab­ oratory synthesis. A blue label ("Technical") goes on high-grade commercial compounds. The purity of the more than 3400 Eastman Organic Chemicals is actually checked in many ways, but a statement of melting or boiling ranges, obtained by actual measurement in our control laboratory, is what we believe to be most generally informative. That's the way we do it in our catalog. The latest issue is List No. 37. If you don't have a copy, you'll do well to send for it without delay. Write Distillation Products Industries, Eastman Organic Chemicals Department, Rochester 3, Ν. Υ. (Division of Eastman Kodak Company.)

DPi

Eastman Organic Chemicals for science and industry

Also . . . vitamins A and Ε . . . distilled

monoglycerides . . . high vacuum

equipment