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Laurent acid

Laurent acid structure

CAS No:
84-89-9
Formula:
C10H9NO3S
Chemical Name:
Laurent acid
Synonyms:
1-Naphthalenesulfonic acid,5-amino-;5-Amino-1-naphthalenesulfonic acid;Laurent acid;1-Naphthylamine-5-sulfonic acid;5-Naphthylamine-1-sulfonic acid;1-Amino-5-sulfonaphthalene;1-Amino-5-naphthalenesulfonic acid;5-Sulfo-1-naphthylamine;NSC 28691;NSC 7553
Categories:
Organic Chemistry > Carboxylic Acids and Derivatives

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Laurent acid Basic Attributes

Molecular Weight：

223.25

Exact Mass：

223.25

BRN：

2214149

EC Number：

201-571-0

UNII：

W70WC365OD

NSC Number：

28691|7553

DSSTox ID：

DTXSID7058911

HScode：

2921450090

Characteristics

PSA：

88.8

XLogP3：

0.42

Appearance：

White or pale pink needle-like crystal

Density：

1.5±0.1 g/cm3

Melting Point：

>300°C

Refractive Index：

1.713

Water Solubility：

soluble in hot water.

Toxicity：

Oral-rat LD50: > 5000 mg/kg; Oral-Mouse LD50: LD50: > 5000 mg/kg

Flammability characteristics：

Flammable; burning produces toxic nitrogen oxides and sulfur oxide fumes

Safety Information

Packing level：

III

Hazard category：

Transport codes：

UN 2585 8/PG 3

wgk germany：

hazard class code：

20/21/22-34

safety instructions：

26-36/37/39-45

RTECS Number：

QK1270500

Marks：

Storage features：

Warehouse ventilated, low temperature and dry

Precautionary statement(s)：

P280-P305 + P351 + P338-P310

Hazard Statements：

H312-H314-H332

GHS Classification：

|Danger|H312 (86.96%): Harmful in contact with skin [Warning Acute toxicity, dermal]|P260, P261, P264, P271, P280, P301+P330+P331, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P322, P332+P313, P337+P313, P362, P363, P403+P233, P405, and P501|Aggregated GHS information provided by 86 companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Toxicity

Toxicity class：

practically nontoxic

Drug Information

MeSH Entry Terms：

1-aminonaphthalene-5-sulfonate

Laurent acid Use and Manufacturing

Methods of Manufacturing

Naphthalene is sulfonated at low temperature to obtain naphthalenesulfonic acid, nitrated with nitric acid to obtain 5-nitro-1-naphthalenesulfonic acid, and then neutralized with magnesium carbonate to separate 1-naphthylamine-8-sulfonic acid magnesium salt, reduced by iron powder, Acidification with sulfuric acid produces peri-position acid. The filtrate obtained by neutralization and separation is reduced and acidified to obtain 1-naphthylamine-5-sulfonic acid.

Uses

Intermediate of dyestuff

Manufacturing Info：

1-Naphthalenesulfonic acid, 5-amino-: ACTIVE

Computed Properties

Molecular Weight:223.25
XLogP3:1.4
Hydrogen Bond Donor Count:2
Hydrogen Bond Acceptor Count:4
Rotatable Bond Count:1
Exact Mass:223.03031432
Monoisotopic Mass:223.03031432
Topological Polar Surface Area:88.8
Heavy Atom Count:15
Complexity:322
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

1-Naphthylamine

Magnesite

Sulfuric acid

Nitric acid

Chlorosulfonic acid

Naphthalene

Downstream Products

1-Naphthylamine

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CAS No.: 84-89-9

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5-Amino-1-naphthalenesulfonic acid

CAS No.: 84-89-9

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