subject                       standard character White or quasi-white powder Than the curl [alpha] -4.6°～-5.2° Dry weight loss ≤0.5% Heavy metal 10ppm Free aromatic amine 0.02% Free iodine The toluene layer is colorless Free iodide 10ppm Free acid or base 5mg hydrochloric acid /100g or 3mg sodium hydroxide /100g Ignition residue ≤0.1% About the material Total miscellaneous ≤0.25%, single miscellaneous ≤0.1% content 98.0～101.0%

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