Fluorescent brightening agent er is compound of chrysophenine , fluorescent brightening agent er is green yellow crystal , mainly used in the bleach of terylene , estron , polyamide fibre and washing powder 荧光增白剂er为二苯乙烯类化合物。荧光增白剂er的结晶为绿黄色结晶物，可用于涤纶、醋酸纤维、锦纶和洗衣粉的增白。
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