CAS 13545-67-0
:Ethyl orange
Description:
Ethyl orange is a pH indicator commonly used in titrations and various laboratory applications. It is a sulfonic acid derivative of azo dye, characterized by its vibrant orange color in acidic solutions and a yellow hue in alkaline conditions. The transition occurs around a pH range of 3.1 to 4.4, making it particularly useful for detecting the endpoint of titrations involving strong acids and weak bases. Ethyl orange is soluble in water and exhibits a distinct color change, which is attributed to the protonation and deprotonation of its azo group. In addition to its role as a pH indicator, ethyl orange is also utilized in various fields, including food and textile industries, due to its dyeing properties. However, it is important to handle this compound with care, as it may pose health risks if ingested or inhaled. Overall, ethyl orange serves as a valuable tool in analytical chemistry, providing clear visual cues for pH changes in solutions.
Formula:C16H19N3O3S·K
InChI:InChI=1S/C16H19N3O3S.K/c1-3-19(4-2)15-9-5-13(6-10-15)17-18-14-7-11-16(12-8-14)23(20,21)22;/h5-12H,3-4H2,1-2H3,(H,20,21,22);
InChI key:InChIKey=PWGBNSNDGHLUDV-UHFFFAOYSA-N
SMILES:N(CC)(CC)C1=CC=C(N=NC2=CC=C(S(=O)(=O)O)C=C2)C=C1.[K]
Synonyms:- 4-[p-(Diethylamino)phenylazo]benzenesulfonic acid
- 4-{(E)-[4-(diethylamino)phenyl]diazenyl}benzenesulfonate
- Benzenesulfonic acid, 4-[2-[4-(diethylamino)phenyl]diazenyl]-, potassium salt (1:1)
- Benzenesulfonic acid, 4-[[4-(diethylamino)phenyl]azo]-, potassium salt
- Benzenesulfonic acid, p-[[p-(diethylamino)phenyl]azo]-, potassium salt
- potassium 4-{(E)-[4-(diethylamino)phenyl]diazenyl}benzenesulfonate
- Ethyl orange
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