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Optical Brightener ER-I
Optical Brightener ER-I/ER-I C.I.: 199 CAS NO.: 13001-40-6 Appearance: light yellow powder/liquid Purity: 99.0% Melting Point: 230-232℃
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Optical Brightener ER-II
Optical Brightener ER-II C.I.: 199:1 CAS NO.: 13001-38-2 Appearance: light yellow powder/liquid Purity: 99.0% Melting Point: 188-192℃
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