57564-54-2

Basic information

• Product Name: TETRANITROPHENOLSULFONPHTHALEIN
• Synonyms: TETRANITROPHENOLSULFONPHTHALEIN;phenol,4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis[2,6-dinitro-,s,s-dioxide;4,4'-[(3H-2,1-Benzoxathiole 2,2-dioxide)-3-ylidene]bis[2,6-dinitrophenol];Tetranitrophenolsulfonephthalein
• CAS NO: 57564-54-2
• Molecular Formula: C₁₉H₁₀N₄O₁₃S
• Molecular Weight: 534.37
• Product Categories: Organics
• Mol File: 57564-54-2.mol
• Article Data: 0

Chemical Properties

• Boiling Point: 614.6°Cat760mmHg
• Flash Point: 325.5°C
• Appearance: /
• Density: 1.86g/cm³
• Vapor Pressure: 1.07E-15mmHg at 25°C
• Refractive Index: 1.745
• PKA: 1.08±0.10(Predicted)
• CAS DataBase Reference: TETRANITROPHENOLSULFONPHTHALEIN(CAS DataBase Reference)
• NIST Chemistry Reference: TETRANITROPHENOLSULFONPHTHALEIN(57564-54-2)
• EPA Substance Registry System: TETRANITROPHENOLSULFONPHTHALEIN(57564-54-2)

Safety Data

• Hazardous Substances Data: 57564-54-2(Hazardous Substances Data)

Usage

General Description

Tetranitrophenolsulfonphthalein, also known as TNPS, is a yellow organic compound with the chemical formula C19H7N3O10S. It is commonly used as a pH indicator to determine the acidity or basicity of a solution. TNPS changes color from yellow to green in the presence of alkaline conditions and from yellow to red in acidic conditions. It is often employed in laboratories and industrial settings for qualitative and quantitative analysis of acids and bases. Additionally, TNPS has applications in the field of medicine, particularly in the measurement of pH levels in bodily fluids. However, it should be handled with care as it is considered toxic and can cause skin and eye irritation.

InChI:InChI=1/C19H10N4O13S/c24-17-12(20(26)27)5-9(6-13(17)21(28)29)19(11-3-1-2-4-16(11)37(34,35)36-19)10-7-14(22(30)31)18(25)15(8-10)23(32)33/h1-8,24-25H