Product Description of Naphthalene-2-sulfonic Acid CAS#120-18-3
Naphthalene-2-sulfonic Acid is usually presented as white to light-brown flaky crystals or crystalline powder.. Its melting-point values differ among various hydrate states. The anhydrous substance melts at 91°C, its trihydrate form reaches 83°C and the monohydrate variant has a melting-point of 124°C.
Naphthalene-2-sulfonic acid can dissolve easily inside water, ethyl alcohol and diethyl ether. Besides, it possesses deliquescent characteristics and tends to soak up ambient moisture under common storage surroundings.
Naphthalene-2-sulfonic Acid Chemical Properties
| Melting point | 124 °C |
| Boiling point | 317.43°C (rough estimate) |
| density | 1.44 g/cm |
| vapor pressure | 2.33Pa at 20℃ |
| refractive index | 1.4998 (estimate) |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | water: freely soluble(lit.) |
| form | solid |
| pka | 0.27±0.10(Predicted) |
| color | White to slightly brown |
| Water Solubility | Soluble in water. |
| Sensitive | Hygroscopic |
| Merck | 6377 |
| LogP | -0.944 at 23℃ |
| CAS DataBase Reference | 120-18-3(CAS DataBase Reference) |
| EPA Substance Registry System | 2-Naphthalenesulfonic acid (120-18-3) |
| Hazard Codes | C,F |
| Risk Statements | 35-34-11 |
| Safety Statements | 26-36/37/39-45-16 |
| RIDADR | UN 2583 8/PG 2 |
| WGK Germany | 1 |
| RTECS | QK1225000 |
| Hazard Note | Corrosive |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 2904100090 |
Product Application of Naphthalene-2-sulfonic Acid CAS#120-18-3
Regarded as a valuable synthetic building-block, 2-naphthalenesulfonic-acid finds extensive deployment across dyestuff fabrication, textile treatment and leather processing. It acts as fundamental feedstock to manufacture a series of dye precursors covering 2-naphthol, 2-naphtholsulfonic acid, 1,3,6-naphthalenetrisulfonic acid as well as 2-naphthylaminesulfonic acid.
The substance can function as a dehydrogenation catalyst during chemical-making operations. Its condensation reaction with formaldehyde yields dispersant N (NNO), a versatile industrial dispersing additive.
Furthermore, this naphthalene derivative works for biochemical research and lab-testing purposes. It is mainly utilised for the inspection and quantitative testing of peptone and protein substances.
