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7-Hydroxynaphthalene-1,3-disulfonic acid
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Name

7-Hydroxynaphthalene-1,3-disulfonic acid

 EINECS 204-245-6
CAS No. 118-32-1 Density 1.816 g/cm3
PSA 145.73000 LogP 3.20040
Solubility N/A Melting Point N/A
Formula C10H8O7S2 Boiling Point 415.13°C (rough estimate)
Molecular Weight 304.301 Flash Point N/A
Transport Information N/A Appearance N/A
Safety Risk Codes N/A
Molecular Structure Molecular Structure of 118-32-1 (1,3-Naphthalenedisulfonicacid, 7-hydroxy-) Hazard Symbols N/A
Synonyms

2-Hydroxy-6,8-naphthalenedisulfonicacid;2-Naphthol-6,8-disulfonic acid;7-Hydroxy-1,3-naphthalenedisulfonic acid;G acid;NSC 2073;b-Naphtholdisulfonic acid G;

Article Data 19

7-Hydroxynaphthalene-1,3-disulfonic acid Synthetic route

132-57-0

7-hydroxy-naphthalene-1-sulfonic acid

118-32-1

2-naphthol-6,8-disulfonic acid

Conditions
ConditionsYield
beim Sulfurieren;
86-65-7

2-aminonaphthalene-6,8-disulfonate

118-32-1

2-naphthol-6,8-disulfonic acid

Conditions
ConditionsYield
Diazotization.Zersetzung mit siedender verd.Schwefelsaeure;
Verkochen mit verd. Schwefelsaeure.Diazotization;
135-19-3

β-naphthol

118-32-1

2-naphthol-6,8-disulfonic acid

Conditions
ConditionsYield
With sulfuric acid at 60℃; Trennung ueber mehreren Stufen nach mehreren Verfahren (Trennung der γ-Saeure von der R-Saeure);
With sulfuric acid at 20℃; Trennung ueber mehreren Stufen nach mehreren Verfahren (Trennung der γ-Saeure von der R-Saeure);
With sulfuric acid Darstellung;
135-19-3

β-naphthol

A

118-32-1

2-naphthol-6,8-disulfonic acid

B

93-01-6

2-naphthol-6-sulfonic acid

Conditions
ConditionsYield
With sulfuric acid at 60℃; Trennung ueber mehreren Stufen nach mehreren Verfahren (Trennung der γ-Saeure von der R-Saeure);
With sulfuric acid at 60℃; Trennung ueber mehreren Stufen nach mehreren Verfahren (Trennung der γ-Saeure von der R-Saeure);
842-18-2

7-hydroxy-1,3-naphthalene-disulfonic acid, dipotassium salt

118-32-1

2-naphthol-6,8-disulfonic acid

Conditions
ConditionsYield
With water In n-heptane Rate constant; effect of bis(2-ethylhexyl)sulfosuccinate (AOT) on rate constants;

6,8-Disulfo-naphthalen-2-ol anion

118-32-1

2-naphthol-6,8-disulfonic acid

Conditions
ConditionsYield
With oxonium at 293℃; Rate constant;
118-32-1

2-naphthol-6,8-disulfonic acid

86-65-7

2-aminonaphthalene-6,8-disulfonate

Conditions
ConditionsYield
With ammonium hydrogen sulfite; potassium chloride; ammonia In water at 130℃;75%
With ammonium sulfite; ammonia at 100℃;
118-32-1

2-naphthol-6,8-disulfonic acid

95-54-5

1,2-diamino-benzene

A

1311158-17-4

benzo[a]phenazine-3,6-disulfonic acid

B

1311158-19-6

5-(2-hydroxy-6,8-bis(sulfo)naphthalen-1-yl)benzo[a]phenazine-1,3-disulfonic acid

Conditions
ConditionsYield
Stage #1: 2-naphthol-6,8-disulfonic acid In dichloromethane at 20℃; for 20h;
Stage #2: 1,2-diamino-benzene With acetic acid In dichloromethane at 20℃; for 12h;		A n/a
B 74%
118-32-1

2-naphthol-6,8-disulfonic acid

68985-08-0

2,4,6-trimethyl-1,3-benzenedisulfonyl dichloride

tetrasodium 7,7'-[2,4-mesitylenediylbis(sulfonyloxy)]bis(1,3-naphthalenedisulfonate)

Conditions
ConditionsYield
With sodium hydrogencarbonate at 45 - 50℃; for 22h;51%
118-32-1

2-naphthol-6,8-disulfonic acid

1928-01-4

naphthalene-1,5-disulphonyl chloride

2,2'-<1,5-naphthalenediylbis(sulfonyloxy)>bis(6,8-naphthalenedisulfonic acid) tetrasodium salt

Conditions
ConditionsYield
With sodium hydrogencarbonate In water at 45 - 50℃; for 48h;19.2%

7-Hydroxynaphthalene-1,3-disulfonic acid Chemical Properties

The Molecular Structure of 1,3-Naphthalenedisulfonic acid, 7-hydroxy- (CAS NO.118-32-1):

Empirical Formula: C10H8O7S2
Molecular Weight: 304.2963 
IUPAC: 7-hydroxynaphthalene-1,3-disulfonic acid
Product Categories: Intermediates of Dyes and Pigments
Nominal Mass: 304 Da
Average Mass: 304.2963 Da
Monoisotopic Mass: 303.971143 Da 
Index of Refraction: 1.725
Molar Refractivity: 66.53 cm3
Molar Volume: 167.5 cm3 
Surface Tension: 89.5 dyne/cm
Density: 1.816 g/cm3 
log P (octanol-water): -1.420 (none)
Atmospheric OH Rate Constant: 3.81E-12 cm3/molecule-sec at 25°C
InChI
InChI=1/C10H8O7S2/c11-7-2-1-6-3-8(18(12,13)14)5-10(9(6)4-7)19(15,16)17/h1-5,11H,(H,12,13,14)(H,15,16,17)
Smiles
O=S(=O)(O)c1cc(c2c(ccc(O)c2)c1)S(=O)(=O)O

7-Hydroxynaphthalene-1,3-disulfonic acid Specification

 1,3-Naphthalenedisulfonic acid, 7-hydroxy- (CAS NO.118-32-1) is also called as 2-Naphthol-6,8-disulfonic acid ; 2-Hydroxynaphthalene-6,8-disulfonic acid ; 2-Naphthol-6,8-disulfonic acid ; 7-Hydroxy-1,3-naphthalenedisulfonic acid ; EINECS 204-245-6 ; G Acid ; NSC 2073 ; beta-Naphthol-gamma-disulfonic acid ; beta-Naphtholdisulfonic acid G ;7-Hydroxynaphthalene-1,3-disulphonic acid .

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