Laurent acid
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Laurent acid
structure -
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CAS No:
84-89-9
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Formula:
C10H9NO3S
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Chemical Name:
Laurent acid
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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
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CAS No:
Laurent acid Basic Attributes
223.25
223.25
2214149
201-571-0
W70WC365OD
28691|7553
DTXSID7058911
2921450090
Characteristics
88.8
0.42
White or pale pink needle-like crystal
1.5±0.1 g/cm3
>300°C
1.713
soluble in hot water.
Oral-rat LD50: > 5000 mg/kg; Oral-Mouse LD50: LD50: > 5000 mg/kg
Flammable; burning produces toxic nitrogen oxides and sulfur oxide fumes
Safety Information
III
8
UN 2585 8/PG 3
3
20/21/22-34
26-36/37/39-45
QK1270500
C
Warehouse ventilated, low temperature and dry
P280-P305 + P351 + P338-P310
H312-H314-H332
|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.
Laurent acid Use and 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.
Intermediate of dyestuff
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
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