2014 Edition, August 1, 2014
Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates
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Description / Abstract:
This test method measures the color of clear liquids. It is
applicable only to materials whose color-producing bodies have
light-absorption characteristics similar to those of the platinum
cobalt color standards used.2 (See Test Method D1209 and Note 1.)
Suitable isocyanates include toluene diisocyanate, and pure or
modified monomeric methylene di(phenylisocyanate).