基本信息
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二甲酚橙
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1611-35-4
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-;二甲苯酚橙
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C31H32N2O13S
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673.00
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Glycine,N,N'-[(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[(6-hydroxy-5-methyl-3,1-phenylene)methylene]]bis[N-(carboxymethyl)-
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216-553-8
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1.564 g/cm3
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Aceticacid, [(a-hydroxy-o-sulfobenzylidene)bis[(6-hydroxy-5-methyl-m-phenylene)methylenenitrilo]]tetra-,g-sultone (7CI); Acetic acid,[3H-2,1-benzoxathiol-3-ylidenebis[(6-hydroxy-5-methyl-m-phenylene)methylenenitrilo]]tetra-,S,S-dioxide (8CI); Glycine, N,N'-[3H-2,1-benzoxathiol-3-ylidenebis[(6-hydroxy-5-methyl-3,1-phenylene)methylene]]bis[N-(carboxymethyl)-,S,S-dioxide; Phenolsulfonephthalein,3',3''-bis[[bis(carboxymethyl)amino]methyl]-5',5''-dimethyl- (6CI);3H-2,1-Benzoxathiole, glycine deriv.; Cresol Phthalexon S; NSC 324982; XylenolOrange; o-Cresolphthalexon S
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495.1oC
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222oC
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895.1oC at 760 mmHg
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详细信息
二甲酚橙又称 二甲酚桔黄 二甲酚橙三钠盐 邻甲酚磺酰酞-3,3'-双甲基亚氨基二乙酸 3,3'-双[N,N-二(羧甲基)氨基甲基]邻甲酚磺酰酞分子式：C31H32N2O13S 分子量： 672.66性状 紫色结晶，易溶于水。它在pH>6.3时显红色，pH=6.3时呈中间颜色。而二甲酚橙与金属离子的络合物则是红紫色的，故它只能在pH<6.3的酸性溶液中作用。用二甲酚橙为指示剂，在酸性溶液中以EDTA直接滴定Bi3+,Zn2+,Pb2+,Hg2+等离子可得很好结果。用途 酸碱指示剂、金属指示剂
