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2-Naphthalenesulfonic acid

2-Naphthalenesulfonic acid structure

CAS No:
120-18-3
Formula:
C10H8O3S
Chemical Name:
2-Naphthalenesulfonic acid
Synonyms:
2-Naphthalenesulfonic acid;β-Naphthalenesulfonic acid;β-Naphthylsulfonic acid;2-Naphthylsulfonic acid;2-Sulfonaphthalene;Dirinal NSK;54257-18-0
Categories:
Organic Chemistry > Hydrocarbons and Derivatives

Description

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.

2-Naphthalenesulfonic acid Basic Attributes

Molecular Weight：

208.23

Exact Mass：

208.23

EC Number：

204-375-3

UNII：

O9S4K2S25E

DSSTox ID：

DTXSID5044788

HScode：

2904100000

Characteristics

PSA：

62.8

XLogP3：

0.6

Appearance：

off white powder

Density：

1.4±0.1 g/cm3

Melting Point：

91 °C

Refractive Index：

1.670

Water Solubility：

soluble in water.

Storage Conditions：

Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area.

Vapor Pressure：

7.05E-12mmHg at 25°C

Safety Information

Packing level：

Ⅱ

Hazard category：

Transport codes：

UN 2583 8/PG 2

wgk germany：

hazard class code：

35-34-11

safety instructions：

26-36/37/39-45-16

RTECS Number：

QK1225000

Marks：

C,F

Hazard note：

Corrosive

Stability/Shelf Life：

Stable under normal temperatures and pressures.

Precautionary statement(s)：

P260-P280-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338

Hazard Statements：

H290-H314

GHS Classification：

|Danger|H302 (49.83%): Harmful if swallowed [Warning Acute toxicity, oral]|P260, P264, P270, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P363, P405, and P501|Aggregated GHS information provided by 290 companies from 14 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Drug Information

MeSH Entry Terms：

naphthalene-2-sulfonic acid

2-Naphthalenesulfonic acid Use and Manufacturing

Methods of Manufacturing

It is obtained by sulfonation of naphthalene. It is obtained by sulfonating at 160-166℃ with naphthalene as raw material and 98% sulfuric acid as sulfonating agent. During the sulfonation process, a small amount of α-naphthalene sulfonic acid by-product is generated. Using heating method, the unstable α-naphthalene sulfonic acid can be hydrolyzed at 140-150°C to remove the sulfonic acid group and become naphthalene and sulfuric acid. Use steam Then the naphthalene can be blown out. During the hydrolysis and blowing of naphthalene, a small amount of lye should be added to neutralize part of the sulfuric acid. It also reacts with naphthalenesulfonic acid to generate β-naphthalenesulfonic acid sodium salt crystals, which are filtered to obtain the finished product.

Uses

Peptone and protein determination. Dehydrogenation catalyst. Used in the production of 2-naphthol; 2-naphtholsulfonic acid; 2-naphthylaminesulfonic acid and other dye intermediates. The product is condensed with formaldehyde to produce a diffusing agent N (diffusing agent NNO).

Production

< 25,000 lb

Manufacturing Info：

2-Naphthalenesulfonic acid: ACTIVE

Computed Properties

Molecular Weight:208.24
XLogP3:0.6
Hydrogen Bond Donor Count:1
Hydrogen Bond Acceptor Count:3
Rotatable Bond Count:1
Exact Mass:208.01941529
Monoisotopic Mass:208.01941529
Topological Polar Surface Area:62.8
Heavy Atom Count:14
Complexity:291
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Naphthalene

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Guide of 2-Naphthalenesulfonic acid

Description
Basic Attributes
Characteristics
Safety Information
Drug Information
Use and Manufacturing
Computed Properties
Material
Recommended Suppliers
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2-Naphthalenesulfonic acid

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