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User:WYX Samuel/钙试剂

钙试剂
IUPAC名
Sodium 3-hydroxy-4-[(2-hydroxy-1-naphthyl)diazenyl]-1-naphthalenesulfonate
3-羟基-4-[(2-羟基-1-萘基)偶氮基]-1-萘磺酸钠
英文名 Calcon
别名 * C.I. 15705
  • C.I. 酸性媒介黑 17
  • 铬蓝黑R
  • Palatine Chrome Black 6 BN
识别
CAS号 2538-85-4
PubChem 135465074
ChemSpider 21159665
EINECS 219-810-2
性质
化学式 C20H13N2NaO5S
摩尔质量 416.39 g·mol−1 g·mol⁻¹
外观 黑色固体[1]
溶解性 可溶于水 (20 g·l−1 ,20 °C)[1]
危险性
GHS危险性符号
刺激性物质
GHS提示词 Warning[1]
H-术语 H315, H319, H335[1]
P-术语 P280, P302+352, P304+340, P312, P332+313, P337+313[1]
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

钙试剂 (也称铬蓝黑R)是一种水溶性偶氮染料,可用作的配位指示剂。其结构类似于氮紅

属性和用途

[编辑]

钙试剂是一种深棕色至黑紫色的粉末,可在水中溶解呈蓝紫色。通过添加酸降低pH值会使颜色变浅。 [2]

该染料在结构上与钙指示剂相似,并且与Al(III)离子形成非常稳定的络合物。因此,它可用于非常灵敏的铝的伏安法测定,例如用于测定饮用水中的铝,灵敏度约为5 微克每升。 [3]

参考文献

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 Eriochromblauschwarz R. Acros. [2017-05-15]. 
  2. ^ Eriochromblauschwarz R. Chemikalienlexikon. [2019-11-24]. 
  3. ^ Voltammetrische Aluminiumbestimmung. Metrohm-Ionenanalytik. [2019-11-24]. 
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User:WYX Samuel/钙试剂
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