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Disodium 2-naphthol-3,6-disulfonate

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Name

Disodium 2-naphthol-3,6-disulfonate

EINECS 205-196-3
CAS No. 135-51-3 Density N/A
PSA 151.39000 LogP 2.51520
Solubility N/A Melting Point 107oC
Formula C10H6Na2O7S2 Boiling Point N/A
Molecular Weight 348.265 Flash Point N/A
Transport Information N/A Appearance slightly grey solid
Safety 26-36 Risk Codes 36/38
Molecular Structure Molecular Structure of 135-51-3 (2,7-Naphthalenedisulfonicacid, 3-hydroxy-, sodium salt (1:2)) Hazard Symbols IrritantXi
Synonyms

2,7-Naphthalenedisulfonicacid, 3-hydroxy-, disodium salt (8CI,9CI);2-Hydroxy-3,6-naphthalenedisulfonicacid disodium salt;2-Naphthol-3,6-disulfonic acid disodium salt;Disodium2-hydroxy-3,6-naphthalenedisulfonate;Fericon;R Salt;

 

Disodium 2-naphthol-3,6-disulfonate Synthetic route

135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

3-{4-[(E)-2-(2,4-Dichloro-phenyl)-vinyl]-phenyl}-2-mercapto-4-oxo-3,4-dihydro-quinazoline-6-diazonium

C32H18Cl2N4O8S3(2-)*2Na(1+)

Conditions
ConditionsYield
With sodium carbonate; sodium chloride In water 1.) 0-5 deg C, 3 h; 2.) 60 deg C;82%
1359877-34-1

1-adamantyl-(4-aminophenyl)methanone

135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

4-(2-(4-(1-adamantylcarbonyl)phenyl)diazenyl)-3-hydroxynaphthalene-2,7-disulfonate disodium

Conditions
ConditionsYield
Stage #1: 1-adamantyl-(4-aminophenyl)methanone With hydrogenchloride; sodium nitrite In water for 0.25h;
Stage #2: 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt With sodium hydroxide In water for 0.25h;
76%
135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

sodium 5-aminonaphthalene-1-sulfonate

C20H11N2O10S3(3-)*3Na(1+)

Conditions
ConditionsYield
Stage #1: sodium 5-aminonaphthalene-1-sulfonate With hydrogenchloride; sodium nitrite In water at 0 - 5℃;
Stage #2: 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt In water at 0 - 5℃; pH=9 - 10;
71%
1359877-36-3

1-adamantyl-(3-aminophenyl)methanone

135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

4-(2-(3-(1-adamantylcarbonyl)phenyl)diazenyl)-3-hydroxynaphthalene-2,7-disulfonate disodium

Conditions
ConditionsYield
Stage #1: 1-adamantyl-(3-aminophenyl)methanone With hydrogenchloride; sodium nitrite In water for 0.25h;
Stage #2: 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt With sodium hydroxide In water for 0.25h;
71%
553-26-4

4,4'-bipyridine

cobalt(II) nitrate hexahydrate

135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

[{Co(4,4’-bipyridine)(H2O)4}.(3-hydroxy-2,7-naphthalenedisulfonate)·2H2O]n

Conditions
ConditionsYield
In methanol at 20℃; for 0.166667h;70%
135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

Sodium 2-aminonaphthalene-6-sulfonate

C20H11N2O10S3(3-)*3Na(1+)

Conditions
ConditionsYield
Stage #1: Sodium 2-aminonaphthalene-6-sulfonate With hydrogenchloride; sodium nitrite In water at 0 - 5℃;
Stage #2: 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt In water at 0 - 5℃; pH=9 - 10;
63%
58306-87-9

sodium 2-amino-5-naphthalenesulfonate

135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

C20H11N2O10S3(3-)*3Na(1+)

Conditions
ConditionsYield
Stage #1: sodium 2-amino-5-naphthalenesulfonate With hydrogenchloride; sodium nitrite In water at 0 - 5℃;
Stage #2: 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt In water at 0 - 5℃; pH=9 - 10;
62%
135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

28907-84-8

sodium 5-aminonaphthalene-2-sulfonate

C20H11N2O10S3(3-)*3Na(1+)

Conditions
ConditionsYield
Stage #1: sodium 5-aminonaphthalene-2-sulfonate With hydrogenchloride; sodium nitrite In water at 0 - 5℃;
Stage #2: 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt In water at 0 - 5℃; pH=9 - 10;
57%
135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

214360-73-3

4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)aniline

1-(4-boronophenylazo)-2-hydroxy-3,6-naphthalenedisulfonic acid disodium salt

Conditions
ConditionsYield
Stage #1: 4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)aniline With hydrogenchloride; sodium nitrite for 0.25h;
Stage #2: 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt In water at 0 - 20℃; Further stages.;
33%
Stage #1: 4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)aniline With hydrogenchloride; sodium nitrite In water at 0℃; for 0.5h;
Stage #2: 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt With sodium hydroxide In water for 0.75h; pH=6;
21.8%
135-51-3

3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

13954-50-2

3,3'-dimethyl-biphenyl-4,4'-bisdiazonium; dichloride

7585-39-9

β‐cyclodextrin

C42H70O35*C34H22N4O14S4(4-)*4Na(1+)

Conditions
ConditionsYield
With sodium carbonate6%

Disodium 2-naphthol-3,6-disulfonate Chemical Properties


IUPAC Name: Disodium 3-hydroxynaphthalene-2,7-disulfonate
Canonical SMILES: C1=CC(=CC2=CC(=C(C=C21)O)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]
InChI: InChI=1S/C10H8O7S2.2Na/c11-9-4-6-1-2-8(18(12,13)14)3-7(6)5-10(9)19(15,16)17;;/h1-5,11H,(H,12,13,14)(H,15,16,17);;/q;2*+1/p-2
Empirical Formula: C10H6Na2O7S2 
Molecular Weight: 348.26 
EINECS: 205-196-3
Classification Code: Reproductive Effect
Stability: Stable. Incompatible with strong oxidizing agents.
H-Bond Donor: 1  
H-Bond Acceptor of R salt (CAS NO.135-51-3): 7

Disodium 2-naphthol-3,6-disulfonate Uses

 R salt (CAS NO.135-51-3) is used for the system of food coloring, azo dyes, photosensitive copying paper. It is used as a fluorescent indicator, but also for the synthesis of azo dyes and used for the production of edible pigment, azo dyes, photosensitive copy paper.

Disodium 2-naphthol-3,6-disulfonate Consensus Reports

Reported in EPA TSCA Inventory.

Disodium 2-naphthol-3,6-disulfonate Safety Profile

An experimental teratogen. Experimental reproductive effects. When heated to decomposition it emits toxic fumes of SOx and Na2O.
Hazard Codes: IrritantXi
Risk Statements:
R36/38:Irritating to eyes and skin .
Safety Statements:
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
WGK Germany: 3
RTECS: QJ6477000 

Disodium 2-naphthol-3,6-disulfonate Specification

  R salt (CAS NO.135-51-3), its Synonyms are 2-Naphthol-3,6-disulfonic acid sodium salt ; 2-Naphthol-3,6-disulfonic acid, disodium salt ; 3-Hydroxy-2,7-naphthalenedisulfonic acid disodium salt ; 3-Hydroxynapthlene-2,7-disulfonic acid sodium salt ; Disodium 2-hydroxy-3,6-naphthalene disulfonate ; Disodium 2-naphthol-3,6-disulfonate ; Fericon ; Ferricon ; 2,7-Naphthalenedisulfonic acid, 3-hydroxy-, disodium salt ; 2,7-Naphthalenedisulfonic acid, 3-hydroxy-, sodium salt (1:2) . It is slightly grey solid.

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