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1-Amino-2-naphthol-4-sulfonic acid (CAS 116-63-2), known as 1,2,4-Acid, is an organic compound (C₁₀H₉NO₄S) appearing as a crystalline solid. It is soluble in alkaline solutions.
Main Uses:
Dye Intermediate – Manufactures acid mordant and complex dyes for textiles.
Analytical Reagent – Colorimetric agent for detecting nitrate and nitrite in laboratories.
Organic Synthesis – Building block for complex organic molecules and pharmaceutical intermediates.
Research – Used in biochemical and environmental applications.
Storage: Keep sealed in a cool, dry place, protected from light. Store away from moisture. Handle with safety equipment. Ensure proper ventilation. This compound is valued in the chemical industry for its versatility in dye production and analytical chemistry. Proper handling ensures safety during industrial and laboratory processes. It is widely utilized in spectrophotometry and water quality testing.
1-Amino-2-naphthol-4-sulfonic acid (also known as 1,2,4-Acid or ANSA) is an organic chemical compound with the following characteristics:
Property Value
Chemical Name 1-Amino-2-naphthol-4-sulfonic acid
CAS Number 116-63-2
Molecular Formula C₁₀H₉NO₄S
Molecular Weight 239.25 g/mol
Other Names 1,2,4-Acid; 4-Amino-3-hydroxy-1-naphthalenesulfonic acid
Physical Properties
Appearance: Contains half molecule of crystalline water
Solubility: Soluble in hot sodium bisulfite and alkaline solutions; insoluble in cold ether
Grade: AR (Analytical Reagent)
Storage: Sealed, cool, dry, protected from light
Main Uses and Applications
1. Dye Intermediate
Primary use as intermediate for acid mordant dyes
Used in production of acid complex dyes
2. Analytical Chemistry
Functions as a colorimetric reagent
Used to detect specific chemical substances in laboratory analysis
3. Organic Synthesis
Serves as intermediate for synthesizing complex organic compounds
Participates in various chemical transformation reactions
4. Laboratory Research
Biochemical reagent for scientific research purposes
Available in various specifications (1g/5g/25g/100g)
5. Industrial Applications
Pharmaceutical industry applications
Environmental protection field uses
Chemical manufacturing processes
Safety Note
This product is for research and laboratory use only – not for clinical medical or other non-scientific purposes. Handle with appropriate protective equipment and store properly in sealed containers away from light and moisture.
1-Amino-2-naphthol-4-sulfonic acid is primarily valued in the dye industry and analytical chemistry as a versatile intermediate and reagent.
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