5423-07-4

Basic information

• Product Name: NITRAZINE YELLOW
• Synonyms: CI NO 14890;CI 14890;2-(2,4-DINITROPHENYLAZO)-1-HYDROXYNAPHTHALENE-3,6-DISULFONIC ACID DISODIUM SALT;2-(2,4-DINITROPHENYLAZO)-1-NAPHTHOL-3,6-DISULFONIC ACID, DISODIUM SALT;2-[2,4-DINITROPHENYLAZO]NAPHTHOL-3,6-DISULFONIC ACID DISODIUM SALT;3-(2,4-DINITROPHENYLAZO)-4-HYDROXY-2,7-NAPHTHALENEDISULFONIC ACID, DISODIUM SALT;NITRAZINE YELLOW;NITRAZOL YELLOW
• CAS NO: 5423-07-4
• Molecular Formula: C16H8N4Na2O11S2
• Molecular Weight: 542.36
• EINECS: 226-549-8
• Product Categories: Azo
• Mol File: 5423-07-4.mol
• Article Data: 0

Chemical Properties

• Melting Point: >250°C
• Appearance: Brown to yellow to orange/Powder
• Density: 1.94g/cm³
• Refractive Index: 1.783
• Storage Temp.: 2-8°C
• Solubility: Solubility Soluble in water, acetic acid ethanol
• Water Solubility: Dissolve in water at 1mg/ml
• CAS DataBase Reference: NITRAZINE YELLOW(CAS DataBase Reference)
• NIST Chemistry Reference: NITRAZINE YELLOW(5423-07-4)
• EPA Substance Registry System: NITRAZINE YELLOW(5423-07-4)

Safety Data

• Hazard Codes: F
• Statements: 5
• Safety Statements: 15-22-24/25
• WGK Germany: 3
• TSCA: Yes
• Hazardous Substances Data: 5423-07-4(Hazardous Substances Data)

Usage

Description

Nitrazine Yellow is a pH-sensitive azo dye that exhibits a color change from yellow to blue within the pH range of 6.0 to 7.0. It is characterized by its bordeaux to brown powder form, which is soluble in water, dilute acid, and dilute alkali, with a maximum absorption wavelength of 586nm. This dye is known for its utility in various applications due to its color-changing properties in response to pH variations.

Uses

Used in Medical Applications:
Nitrazine Yellow is used as a diagnostic tool for testing vaginal pH during late pregnancy. The application reason is to determine the breakage of the amniotic sac, which can be a critical factor in assessing the health and progress of a pregnancy.
Used in Diagnostic Testing for Digestive Issues:
Nitrazine Yellow serves as a pH indicator for fecal pH tests, which are essential in diagnosing intestinal infections or other digestive problems. The dye's color change helps in identifying the presence of abnormal pH levels in the feces, providing valuable information for medical professionals.
Used in Civil Engineering:
In the field of civil engineering, Nitrazine Yellow is utilized to determine the carbonatation spread in concrete structures. The application reason is to assess the state of the rebar's passivation film, which is crucial for maintaining the structural integrity and durability of concrete structures. By monitoring the pH changes, engineers can ensure the proper functioning and longevity of these constructions.

InChI:InChI=1/C16H10N4O11S2/c21-16-11-3-2-10(32(26,27)28)5-8(11)6-14(33(29,30)31)15(16)18-17-12-4-1-9(19(22)23)7-13(12)20(24)25/h1-7,17H,(H,26,27,28)(H,29,30,31)/b18-15-