119-79-9

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119-79-9 Structure

Identification	More
[Name] 1-Aminonaphthalene-6-sulfonic acid
[CAS] 119-79-9
[Synonyms] 1,6-CLEVES ACID 1,6-CLEVE'S ACID 1-amino-6-naphthalenesulfonic acid 1-Amino-6-sulfonaphthalene 1-NAPHTHYLAMINE-6-SULFONIC ACID 5-AMINO-2-NAPHTHALENESULFONIC ACID 5-AMINONAPHTHALENE-2-SULFONIC ACID ALPHA-NAPHTHYLAMINE-6-SULFONIC ACID CLEVE'S ACID 1,6 1-Naphthalene-6-sulfonic acid 1-naphthylamine-6-sulfonic 2-Naphthalenesulfonic acid, 5-amino- 2-Naphthalenesulfonicacid,5-amino- 5-amino-2-naphthalenesulfonicaci 5-Naphthylamine-2-sulfonic acid 5-naphthylamine-2-sulfonicacid cleve’sbeta-acid Cleve's beta-acid Kyselina 1-naftylamin-6-sulfonova Kyselina cleve
[EINECS(EC#)] 257-269-4
[Molecular Formula] C10H9NO3S
[MDL Number] MFCD00004030
[Molecular Weight] 223.25
[MOL File] 119-79-9.mol

Chemical Properties	Back Directory
[Melting point ] >300°C
[density ] 1.3588 (rough estimate)
[vapor pressure ] 0Pa at 25℃
[refractive index ] 1.6500 (estimate)
[storage temp. ] Refrigerator
[solubility ] soluble100mg/mL, clear, brown (1N NH4OH)
[form ] Solid
[pka] pK1: 3.80 (25°C)
[color ] Purple
[Water Solubility ] 1g/L(16 ºC)
[Merck ] 14,2350
[BRN ] 1819887
[InChI] 1S/C10H9NO3S/c11-10-3-1-2-7-6-8(15(12,13)14)4-5-9(7)10/h1-6H,11H2,(H,12,13,14)
[InChIKey] UWPJYQYRSWYIGZ-UHFFFAOYSA-N
[SMILES] Nc1cccc2cc(ccc12)S(O)(=O)=O
[Dissociation constant] 0 at 39℃
[CAS DataBase Reference] 119-79-9(CAS DataBase Reference)
[NIST Chemistry Reference] 1-Naphthylamine-6-sulfonic acid(119-79-9)
[EPA Substance Registry System] 119-79-9(EPA Substance)

Safety Data	Back Directory
[Risk Statements ] R36/37/38:Irritating to eyes, respiratory system and skin .
[Safety Statements ] S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
[RIDADR ] 1759
[WGK Germany ] 1
[RTECS ] QK1285000
[TSCA ] Yes
[REACH Registrations] Active
[HazardClass ] 8
[PackingGroup ] III
[HS Code ] 29309090
[Storage Class] 11 - Combustible Solids

Raw materials And Preparation Products	Back Directory
[Raw materials] Sulfuric acid-->Nitric acid-->Iron-->Naphthalene-->Magnesite-->Naphthalene-2-sulfonic acid-->1-Naphthylamine-7-sulfonic acid
[Preparation Products] Peri acid-->disodium 3-[[4-[[4-amino-6(or 7)-sulphonatonaphthyl]azo]phenyl]azo]-6-[(2,4-diaminophenyl)azo]-4-hydroxynaphthalene-2-sulphonate-->Direct Fast Blue FRL-->Acid orange 51-->C.I. Mordant Brown 90-->tetrasodium 2-[[4-[[4-[[1-hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl]azo]-7-sulphonato-1-naphthyl]azo]-1-naphthyl]azo]benzene-1,4-disulphonate-->Direct Black 197-->Direct Blue 278-->Direct Brown 25-->Mordant Brown 36-->C.I. Direct green 21-->C.I. Direct Brown 150-->C.I. Direct Brown 149-->2-Naphthalenesulfonic acid, 6-[[4-amino-6(or 7)-sulfo-1-naphthalenyl]azo]-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-4-hydroxy-, disodium salt-->C.I. Direct Black 87-->2-Naphthalenesulfonic acid, 5(or 8)-[(2,8-dihydroxy-6-sulfo-1-naphthalenyl)azo]-8(or 5)-[[4-(phenylazo)-6(or 7)-sulfo-1-naphthalenyl]azo]-, trisodium salt

Hazard Information	Back Directory
[Chemical Properties] Purple Solid
[Uses] Fluorescent reagent.
[Uses] Intermediate of dyestuff
[Definition] ChEBI: 5-aminonaphthalene-2-sulfonic acid is an aminonaphthalenesulfonic acid.
[Production Methods] Sulfonation of 1-naphthylamine with concentrated sulfuric acid at 130℃ gives mainly 1-aminonaphthalene-6-sulfonic acid. However, the latter is always made, together with the 1,7-isomer, by nitration of naphthalene-2-sulfonic acid to give the mixed 5- and 8- nitronaphthalene-2-sulfonic acids follwed by reduction to ‘‘mixed Cleve’s acids.’’ A b-sulfonation mass is diluted with sulfuric acid, then 67.5 % nitric acid is added slowly at 34℃. After being quenched and neutralized with calcium carbonate, the filtered liquor is reduced by boiling with iron powder, slight acidity being maintained with sulfuric acid. After basification with magnesia the iron residues are filtered off and the filtrate is evaporated until the magnesium salt of the product crystallizes on cooling. Filtration followed by washing with magnesium sulfate gives a 34 % yield of the magnesium salt of 1,6-Cleve’s acid. Purification by dissolution in hot water, acidification, and filtration of the free acid while hot reduce the yield to 25 % based on naphthalene.
[General Description] The crystal structure of 5-amino-2-naphthalenesulfonic acid (1,6-Cleve′s acid) depicted the presence of a sulfonate-aminium group zwitterion.

Spectrum Detail	Back Directory
[Spectrum Detail] 1-Aminonaphthalene-6-sulfonic acid(119-79-9)MS 1-Aminonaphthalene-6-sulfonic acid(119-79-9)¹HNMR 1-Aminonaphthalene-6-sulfonic acid(119-79-9)¹³CNMR 1-Aminonaphthalene-6-sulfonic acid(119-79-9)IR1 1-Aminonaphthalene-6-sulfonic acid(119-79-9)IR2 1-Aminonaphthalene-6-sulfonic acid(119-79-9)Raman

Well-known Reagent Company Product Information	Back Directory
[Alfa Aesar] 5-Aminonaphthalene-2-sulfonic acid, 97%(119-79-9)
[Sigma Aldrich] 119-79-9(sigmaaldrich)
[TCI AMERICA] 5-Amino-2-naphthalenesulfonic Acid,>97.0%(T)(119-79-9)

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