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Molecular formula : MW : CAS :
nature : dye suppository measured terms, the depth of staining consistent conditions, the unknown dyed the color of objects with the standard dyed the color on the extent of the deviation. Including hue, which, the degree of saturation of the differences. Shade extent of the deviation divided into five stalls : (1) approximation, with two sightings turn around like Shade no difference; (2) -, two with the turn around like visual Shade seems to be differences; (3) slightly, with two samples around the turn of easy visual color difference; (4) than , with two samples used visual appraisal, there is a clear difference; (5), significantly more, two dye is already two basic hue.
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