| Identification | More | [Name]
J acid | [CAS]
87-02-5 | [Synonyms]
2-AMINO-5-HYDROXYNAPHTHALENE-7-SULFONIC ACID
2-AMINO-5-NAPHTHOL-7-SULFONIC ACID
6-AMINO-1-HYDROXY-3-SULFONAPHTHALENE
6-AMINO-1-NAPHTHOL-3-SULFONIC ACID
7-AMINO-4-HYDROXY-2-NAPHTHALENESULFONIC ACID
7-amino-4-hydroxy-2-naphthalene sulphonic acid
7-AMINO-4-HYDROXYNAPHTHALENE-2-SULFONIC ACID
AMINO-NAPHTHOL SULFONIC ACID
AMINONAPHTHOL SULFONIC ACID J
I-ACID
J ACID
6-amino-1-naphthol-3-sulfonicacid(2-5-7)
7-amino-4-hydroxy-2-naphthalenesulfonicaci
7-Amino-4-hydroxynaphtalene-2-sulfonicacid
7-Amino-4-naphthol-2-sulfonicacid
aminonaphthol
isogammaacid
kyselina2-amino-5-naftol-7-sulfonova
kyselina6-amino-1-naftol-3-sulfonova
kyselinai | [EINECS(EC#)]
201-718-9 | [Molecular Formula]
C10H9NO4S | [MDL Number]
MFCD00003970 | [Molecular Weight]
239.25 | [MOL File]
87-02-5.mol |
| Chemical Properties | Back Directory | [Appearance]
Gray needles, white when pure. Soluble in hot water; sparingly soluble in cold water. | [density ]
1.4338 (rough estimate) | [vapor pressure ]
0Pa at 25℃ | [refractive index ]
1.6500 (estimate) | [storage temp. ]
Keep in dark place,Inert atmosphere,Room temperature | [solubility ]
Slightly soluble in water | [form ]
powder
| [pka]
-0.28±0.40(Predicted) | [color ]
yellow
| [Water Solubility ]
5g/L at 20℃ | [InChIKey]
KYARBIJYVGJZLB-UHFFFAOYSA-N | [LogP]
-1.39 | [Uses]
Azo dye intermediate. | [CAS DataBase Reference]
87-02-5(CAS DataBase Reference) | [EPA Substance Registry System]
87-02-5(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S27:Take off immediately all contaminated clothing .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . | [RIDADR ]
UN 2585 8/PG 3
| [WGK Germany ]
1
| [RTECS ]
QK1295500
| [F ]
21 | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
2922190090 | [Toxicity]
LD50 oral in rat: 11500mg/kg |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
Sodium hydroxide-->FUMING SULFURIC ACID-->2-Naphthylamine-->2-Aminonaphthalene-1-sulfonic acid-->NAPHTHENIC ACID | [Preparation Products]
Reactive Orange 5-->disodium 3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate-->5,5'-Dihydroxy-2,2'-dinaphthylamine-7,7'-disulphonic acid-->Reactive Orange 1-->7-(Acetylamino)-4-hydroxy-2-naphthalenesulfonic acid-->6-AMINO-1-NAPHTHOL-->Direct Red 31-->ACID RED 137-->REACTIVE ORANGE 84-->2-Hydroxy-5-[[5-hydroxy-6-[(2-sodiooxycarbonylphenyl)azo]-7-sodiosulfo-2-naphthalenyl]azo]benzoic acid sodium salt-->1,6-Naphthalenedisulfonic acid, 7-[[4'-[(6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-8-hydroxy-, trisodium salt-->REACTIVE ORANGE 82-->Benzoic acid, 2-[[1-amino-7-[[4-[[6-amino-5-[(3-carboxy-4-hydroxyphenyl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-2-methoxyphenyl]azo]-8-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-5-[[6-amino-5-[(3-carboxy-4-hydroxyphenyl)azo]-1-hydroxy-3-sul-->disodium 7-(acetylamino)-3-[[4-[(4-chloro-2-sulphonatophenyl)azo]-2,5-dimethylphenyl]azo]-4-hydroxynaphthalene-2-sulphonate-->trisodium 5-amino-3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate-->tetrasodium 2-[[2-amino-6-[[4-[[4-[(3-carboxylato-4-hydroxyphenyl)azo]-7-sulphonato-1-naphthyl]azo]-2,5-dimethoxyphenyl]azo]-5-hydroxy-7-sulphonato-1-naphthyl]azo]-5-nitrobenzoate-->Direct Blue 278-->Direct Blue 82-->Reactive Red SCARLET 2G-->C.I. Direct Blue 166-->Reactive orange 64 |
| Hazard Information | Back Directory | [Chemical Properties]
Gray needles, white when pure. Soluble in hot water; sparingly soluble in cold water. | [Definition]
ChEBI: An aminonaphthalenesulfonic acid that is 2-naphthalenesulfonic acid substituted by an amino group at position 7 and a hydroxy group at position 4 respectively. | [Production Methods]
A concentrated disodium salt solution of 2-aminonaphthalene-5,7-disulfonic acid is added to 72 % sodium hydroxide at 150 ℃. After heating to 187℃ over 10 h reaction is continued at this temperature for a further 8 h until completion of the reaction is indicated by giving equivalent diazotization and coupling titers for a worked-up sample. Quenching, acidification, purging of sulfur dioxide, and filtration at 55 ℃ followed by washing with water at 50℃ result in an 88 % yield of paste. Purification by salting out the sodium salt from a hot alkaline solution gives a 90 % recovery of the product as gray crystals. An improved process with 90 % yield is claimed by feeding the concentrated 2-aminonaphthalene-5,7-disulfonic acid liquor and the caustic liquor simultaneously into the fusion reactor to maintain more stable conditions. | [Flammability and Explosibility]
Notclassified |
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