Matheson Coleman & Bell

WARNING! EWNBS OF MAXIMUM FIAMMABLE VAPOR HARMFUt

p-Dioxane, Spectroquality Reagent

U H O N l ¥ WITH : ADEQUATE VENTILATION

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PACKED UNDER INERT ATMOSPHERE

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INFRARED TRAKSMSTTANCE [microns) z.« 3.9-

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MC&B Spectroquality Solvents... An unusually complete line of solvents for Spectrophotometric analysis, now available in a n exclusive package t h a t really maintains absorbancy limits. E a c h lot of MC&B Spectroquality Solvents is checked in the ultraviolet and infra red regions for maximum transmission. Copies of absorbancy curves available on request. To protect the high purity, MC&B packs these reagents under an inert atmosphere, using a crown closure under a screw cap. Granular Silica Gel is added to each unit. The new label contains complete usage data. The MC&B Catalog includes data on 24 Spectroquality Solvents. Ask your MC&B distributor for your copy, or write direct.

Matheson Coleman & Bell D i v i s i o n of T h e M a t h e s o n C o m p a n y , Inc. N o r w o o d (Cincinnati), Ohio; E a s t Rutherford, N. J,

14 A

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ANALYTICAL CHEMISTRY