81-06-1

Basic information

• Product Name: 1-AMINO-2-NAPHTHALENESULFONIC ACID
• Synonyms: 1-amino-2-naphthalenesulfonicaci;1-AMINO-2-NAPHTHALENESULFONIC ACID;1-NAPHTHYLAMINE-2-SULFONIC ACID;1-aminonaphthalene-2-sulphonic acid;1-aminonaphthalene-2-sulfonic acid;1-NAPHTHYLAMINE-2-SULFONIC ACID 98%;1,2-Naphthylaminesulfonic acid;α-Naphthylamine-2-sulfonic acid
• CAS NO: 81-06-1
• Molecular Formula: C₁₀H₉NO₃S
• Molecular Weight: 223.25
• EINECS: 201-320-5
• Mol File: 81-06-1.mol

Chemical Properties

• Appearance: /
• Density: 1.3588 (rough estimate)
• Refractive Index: 1.6500 (estimate)
• PKA: pK1: 1.71 (25°C)
• Water Solubility: 4.1g/L(20 oC)
• CAS DataBase Reference: 1-AMINO-2-NAPHTHALENESULFONIC ACID(CAS DataBase Reference)
• NIST Chemistry Reference: 1-AMINO-2-NAPHTHALENESULFONIC ACID(81-06-1)
• EPA Substance Registry System: 1-AMINO-2-NAPHTHALENESULFONIC ACID(81-06-1)

Safety Data

• Hazardous Substances Data: 81-06-1(Hazardous Substances Data)

Usage

Uses

Used in Dye and Pigment Production:
1-Amino-2-naphthalenesulfonic acid is used as a key intermediate in the production of dyes and pigments due to its ability to form colored compounds.
Used in Synthesis of Organic Compounds:
It serves as a versatile intermediate for the synthesis of a variety of other organic compounds, contributing to the development of new chemical products.
Used in Pharmaceutical and Agrochemical Industries:
1-Amino-2-naphthalenesulfonic acid is utilized in the preparation of various pharmaceuticals and agrochemicals, owing to its unique chemical structure and reactivity.
Used as a pH Indicator:
This chemical is employed as a pH indicator due to its ability to form colored complexes with certain metal ions, which is useful in analytical chemistry and other applications requiring pH measurement.
Used in Analytical Chemistry:
1-Amino-2-naphthalenesulfonic acid is used in analytical chemistry for its capacity to form colored complexes with metal ions, aiding in the identification and quantification of these elements in various samples.
Note: While 1-amino-2-naphthalenesulfonic acid has various applications, it is also considered toxic and potentially harmful to human health. Therefore, it requires proper handling, use of personal protective equipment, and disposal procedures to minimize risks.

InChI:InChI=1/C10H9NO3S/c11-10-8-4-2-1-3-7(8)5-6-9(10)15(12,13)14/h1-6H,11H2,(H,12,13,14)

Upstream product

• 84-86-6 4-amino-1-naphthalenesufonic acid 
• 134-32-7 1-amino-naphthalene 
• 121-57-3 4-aminobenzene sulfonic acid 
• 5329-14-6 aminosulfonic acid 
• 7732-18-5 water 

Downstream Products

• 1421062-27-2 C₁₉H₁₃Cl₂N₅O₃S 
• 1089719-84-5 C₁₉H₁₇N₃O₂ 
• 120-18-3 naphthalene-2-sulfonate 
• 605-69-6 1-hydroxy-2,4-dinitronaphthalene 

Relevant articles and documents

Fiber-reactive disazo brown dye having vinylsulfone-type reactive group

A compound, or a salt thereof, represented by the following formula, STR1 wherein A is a substituted or unsubstituted phenylene or naphthylene group, B is STR2 in which R3 is a hydrogen atom or a lower alkyl, lower alkoxy, acylamino or ureido group, and R4 is a hydrogen atom or a lower alkyl or lower alkoxy group, R1 and R3 are independently a hydrogen atom or a substituted or unsubstituted lower alkyl group, X is a substituted or unsubstituted amino, lower alkoxy, substituted phenoxy or sulfo group, Y is --SO2 CH=CH2 or --SO2 CH2 CH2 Z, in which Z is a group capable of being split by the action of an alkali, and m is 2 or 3, which is useful for dyeing hydroxyl group- or amide group-containing fiber materials to give dyed products of a brown color having excellent fastness properties with good build-up property.