22346-43-6

Usage

Uses

Used in Laboratory Applications:
4-hydroxy-7-methylamino-2-Naphthanlenesulfonic acid is used as a pH indicator for determining the endpoint of titrations. It changes from red in acidic conditions to yellow in alkaline conditions, providing a visual cue for the acidity or basicity of a solution in chemical analysis.
Used in the Textile Industry:
In the textile industry, 4-hydroxy-7-methylamino-2-Naphthanlenesulfonic acid is used as a dye for silk and wool, taking advantage of its color-changing properties to create vibrant and distinctive patterns.
Used as a Colorant in Various Products:
4-hydroxy-7-methylamino-2-Naphthanlenesulfonic acid is also utilized as a colorant in a range of products, including food, cosmetics, and other consumer goods, for its ability to impart specific hues and visual appeal.
Safety Considerations:
It is important to handle 4-hydroxy-7-methylamino-2-Naphthanlenesulfonic acid with care due to its toxic nature if ingested and its potential to cause irritation to the skin and eyes. Proper safety measures should be taken during its use and disposal to minimize health risks.

InChI:InChI=1/C11H11NO4S/c1-12-8-2-3-10-7(4-8)5-9(6-11(10)13)17(14,15)16/h2-6,12-13H,1H3,(H,14,15,16)

Upstream product

• 87-02-5 7-amino-4-hydroxy-2-naphthalenesulfonic acid 
• 74-89-5 methylamine 

Relevant academic research and scientific papers

2 - (N-substituted amino) - 5-naphthol-7-sulfonic acid clean production process (by machine translation)

This invention belongs to the dyeing industry, relates to a new material in the field of technology of the dye intermediates, in particular 2 - (N-substituted amino) - 5-naphthol-7-sulfonic acid clean production process. To improve the quality of this invention, waste water is greatly reduced. 2 - (N-substituted amino) - 5-naphthol-7-sulfonic acid clean production process, the method comprises the following steps: A, condensation reaction; B, material after treatment; C, refining the filter cake. And the recovery and reuse of the filtrate. The method of the present invention that are used in the can be of various raw materials are purchased from the market, the compounds of the present invention and the use of the preparation process of the security process is, environmental protection, energy-saving. (by machine translation)

Monoazo compounds having vinylsulfone type fiber reactive group and method for dyeing or printing fiber materials using the same

A monoazo compound of the following formula, STR1 wherein D is phenylene or naphthylene; X is halogeno, pyridinio or STR2 B is --OR3, --SR4, STR3 in which R3, R4, R5 and R6 are each hydrogen, alkyl, phenyl, naphthyl or benzyl, r is 0 or 1, and E is O, SO, SO2, CH2 or NR8, in which R8 is hydrogen or C1 -C4 alkyl; R, R1, R2 and R7 are each hydrogen or alkyl; A1, A2 and A3 are each phenylene, naphthylene or alkylene; Z1, Z2 and Z3 are each --SO2 CH=CH2 or --SO2 CH2 CH2 Y, in which Y is a splittable group; and p is 0 or 1; which compound is useful for dyeing or printing fiber materials to obtain a product dyed or printed in a color superior in various fastness properties with superior build-up property.

Copper complexes of sulpho groups containing disazo dyestuffs

The new disazo dyestuffs of the formula (I) STR1 in which the substituents and indices have the meaning given in the description, and salts thereof are outstandingly suitable for dyeing cellulose-containing materials and leather in blue shades having good wet- and light-fastnesses.