Salts & Minerals
REACH
Sodium beta-naphthoquinone-4-sulfonate
CAS Number
521-24-4
EC Number
208-308-9
Abbreviation
NQS
Industries: Pharma & Healthcare
What is Sodium beta-naphthoquinone-4-sulfonate?
Sodium beta-naphthoquinone-4-sulfonate (CAS 521-24-4), abbreviated NQS, is a water-soluble quinone reagent used in analytical and pharmaceutical chemistry.
Where is Sodium beta-naphthoquinone-4-sulfonate used?
- Pharmaceutical quality control: colorimetric determination of amino-containing APIs such as sulfonamides and aminoglycosides
- Clinical and biochemical analysis: detection and quantification of amino acids
- Biotechnology: labeling reagent for amine-functionalized compounds in assay development and compound characterization
- Stability-indicating methods: selective reactivity with amine groups identifies degradation products in drug formulations
- It reacts with primary and secondary amines to form colored complexes measurable by spectrophotometry.
Commercial specifications
- Purity specifications commonly 97% or higher
- Packaging from small laboratory quantities to bulk orders
Other Names (Synonyms)
1,2-Naphthoquinone-4-sulfonic acid sodium salt|beta-Naphthoquinone-4-sulfonate sodium salt|T7185HP5SH|AI3-50008|Sodium 3,4-dihydro-3,4-dioxo-1-naphthalenesulfonate|1-Naphthalenesulfonic acid, 3,4-dihydro-3,4-dioxo-, sodium salt (1:1)|1-Naphthalenesulfonic acid, 3,4-dihydro-3,4-dioxo-, sodium salt|β-Naphthoquinone-4-sulfonate sodium salt|NQS
What are the physical properties of Sodium beta-naphthoquinone-4-sulfonate?
Melting Point 287 °C (decomp)
Appearance powder
Color dark orange
Odor Odorless
Form solid
Water Solubility Soluble in water and acetone. Slightly soluble in alcohol and ethanol. Insoluble in chloroform.
How is Sodium beta-naphthoquinone-4-sulfonate classified and handled safely? Learn More
Warning
GHS07· Irritant
Hazard Statements
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Which trade and regulatory codes apply to Sodium beta-naphthoquinone-4-sulfonate?
HS Code 29147000
WGK (Germany) 3