Naphthalene-2-sulfonic acid
- Product Name
- Naphthalene-2-sulfonic acid
- CAS No.
- 120-18-3
- Chemical Name
- Naphthalene-2-sulfonic acid
- Synonyms
- 2-NAPHTHALENESULFONIC ACID;NAPHTHALENE-2-SULPHONIC ACID;Dirinal NSK;2-Sulfonaphthalene;2-Naphthalenesulfoni;β-Naphthalenesulfonic;β-Naphthalenesulfonic;beta-naphthalenesulfonic;beta-naphthylsulfonicacid;2-NAPHTHALENESULFONIC ACI
- CBNumber
- CB8118079
- Molecular Formula
- C10H8O3S
- Formula Weight
- 208.23
- MOL File
- 120-18-3.mol
Naphthalene-2-sulfonic acid Property
- 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
- 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)
Safety
- 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
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H290May be corrosive to metals
H314Causes severe skin burns and eye damage
- Precautionary statements
-
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
N-Bromosuccinimide Price
- Product number
- 249548
- Product name
- 2-Naphthalenesulfonic acid
- Purity
- technical grade, 70%
- Packaging
- 5g
- Price
- $26
- Updated
- 2024/03/01
- Product number
- 249548
- Product name
- 2-Naphthalenesulfonic acid
- Purity
- technical grade, 70%
- Packaging
- 100g
- Price
- $120
- Updated
- 2024/03/01
- Product number
- H56685
- Product name
- Naphthalene-2-sulfonic acid, 98%
- Packaging
- 100g
- Price
- $95.3
- Updated
- 2024/03/01
- Product number
- H56685
- Product name
- Naphthalene-2-sulfonic acid, 98%
- Packaging
- 500g
- Price
- $385
- Updated
- 2024/03/01
- Product number
- N378503
- Product name
- Naphthalene-2-sulfonicAcid
- Packaging
- 1g
- Price
- $45
- Updated
- 2021/12/16
Naphthalene-2-sulfonic acid Chemical Properties,Usage,Production
Chemical Properties
Nondeliquescent, white plates.Soluble in water, alcohol, and ether. Combustible.
Uses
Naphthalene-2-sulfonic acid is used in making direct dyes, reactive des and employed as dye and agrochemical intermediates.
Uses
Starting point in the manufacture of β-naphthol, β-naphtholsulfonic acid, β-naphthylaminesulfonic acid, etc.
Preparation
Naphthalene-2-sulfonic acid is prepared by sulfonation of naphthalene.
Step: With naphthalene as raw material, 98% sulfuric acid is used as sulfonating agent, and it is obtained by sulfonation at 160-166 ℃. During the sulfonation process, a small amount of α-naphthalenesulfonic acid by-product is generated. By heating, the unstable α-naphthalenesulfonic acid can be hydrolyzed at 140-150 °C to remove the sulfonic acid group, and become naphthalene and sulfuric acid. Naphthalene can be blown out. During the hydrolysis of naphthalene, a small amount of lye should be added to neutralize part of the sulfuric acid. It also acts with naphthalenesulfonic acid to form β-naphthalenesulfonic acid sodium salt crystals, which can be filtered to obtain the finished product of Naphthalene-2-sulfonic acid.
Definition
ChEBI: Naphthalene-2-sulfonic acid is a naphthalenesulfonic acid in which the sulfo group is linked to position 2 of the naphthalene ring. It has a role as an environmental contaminant and a xenobiotic.
General Description
The fluorescence of 2-naphthalenesulfonic acid (NSA) is effectively quenched by colloidal silver via photoinduced interfacial electron transfer from the excited singlet of NSA to silver. Adsorption behavior of NSA on a conventional macroporous resin Amberlite XAD4 and hypercrosslinked resins NDA101 and NDA100 has been investigated.
Flammability and Explosibility
Non flammable
Purification Methods
Crystallise the acid from conc HCl. The S-benzylisothiuronium salt has m 192o (from aqueous EtOH). [Berger Acta Chem Scand 8 432 1954, Beilstein 11 H 171, 11 IV 527.]
Naphthalene-2-sulfonic acid Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Naphthalene-2-sulfonic acid manufacturers
- Product
- Naphthalene-2-sulfonic acid 120-18-3
- Price
- US $20.00-10.00/kg
- Min. Order
- 25kg
- Purity
- 99%
- Supply Ability
- 100T
- Release date
- 2023-03-09
- Product
- Naphthalene-2-sulfonic acid 120-18-3
- Price
- US $9.90/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 5tons
- Release date
- 2021-10-12
- Product
- Naphthalene-2-sulfonic acid 120-18-3
- Price
- US $100.00-1.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- g-kg-tons, free sample is available
- Release date
- 2023-12-25