|
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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