Disodium 2-naphthol-3,6-disulfonate supplier

Name
Disodium 2-naphthol-3,6-disulfonate
EINECS 205-196-3
CAS No. 135-51-3
Density
Solubility Soluble in water
Melting Point 107oC
Formula C₁₀H₆Na₂O₇S₂
Boiling Point
Molecular Weight 348.265
Flash Point
Transport Information
Appearance slightly grey solid
Safety 26-36
Risk Codes 36/38
Molecular Structure
Hazard Symbols Xi
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;
PSA 151.39000
LogP 2.51520

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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

: 7732-18-5
water

: 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

Conditions	Yield
In methanol at 20℃; for 0.166667h;	70%

...Expand

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: Sodium 2-aminonaphthalene-6-sulfonate

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

Conditions

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
With sodium carbonate	6%

...Expand

: 104-13-2
4-Butylaniline

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 34293-75-9
C20H18N2O7S2(2-)*2Na(1+)

Conditions

Conditions	Yield
(i) (diazotization), (ii) /BRN= 3643184/; Multistep reaction;

: 30090-17-6
4-isobutylaniline

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 34895-10-8
C20H18N2O7S2(2-)*2Na(1+)

Conditions

Conditions	Yield
(i) (diazotization), (ii) /BRN= 3643184/; Multistep reaction;

: 33228-45-4
4-hexylaniline

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 34293-76-0
C22H22N2O7S2(2-)*2Na(1+)

Conditions

Conditions	Yield
(i) (diazotization), (ii) /BRN= 3643184/; Multistep reaction;

: 16245-79-7
4-octylaniline

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 33239-14-4
C24H26N2O7S2(2-)*2Na(1+)

Conditions

Conditions	Yield
(i) (diazotization), (ii) /BRN= 3643184/; Multistep reaction;

: 34895-13-1
p-2-Aethylbutylanilin

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 34293-77-1
C22H22N2O7S2(2-)*2Na(1+)

Conditions

Conditions	Yield
(i) (diazotization), (ii) /BRN= 3643184/; Multistep reaction;

: 34895-14-2
p-2-Aethyl-4-methyl-pentylanilin

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 33239-13-3
C24H26N2O7S2(2-)*2Na(1+)

Conditions

Conditions	Yield
(i) (diazotization), (ii) /BRN= 3643184/; Multistep reaction;

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 62-53-3
aniline

: 5859-00-7
disodium 3-hydroxy-4-(phenylazo)naphthalene-2,7-disulfonate

Conditions

Conditions	Yield
(i) (diazotization), (ii) /BRN= 3643184/; Multistep reaction;

: 96-50-4
2-thiazolylamine

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

A: 2007-19-4
1-nitroso-2-naphthol-3,6-disulfonic acid

B: 2172-27-2
3-hydroxy-4-thiazol-2-ylazo-naphthalene-2,7-disulfonic acid

Conditions

Conditions	Yield
With sulfuric acid; sodium nitrite Rate constant; 1.) -10 deg C, 1 h; 2.) buffer solution; study at different pH;

...Expand

: 17721-00-5
1,3-thiazol-5-amine

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

A: 2007-19-4
1-nitroso-2-naphthol-3,6-disulfonic acid

B: 3-Hydroxy-4-(thiazol-5-ylazo)-naphthalene-2,7-disulfonic acid

Conditions

Conditions	Yield
With nitrosylsulfuric acid; sulfuric acid Rate constant; 1.) -10 deg C; 2.) buffer solution; study at different pH;

...Expand

: 4005-51-0
[1,3,4]Thiadiazol-2-ylamin

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

A: 2007-19-4
1-nitroso-2-naphthol-3,6-disulfonic acid

B: 104946-10-3
3-Hydroxy-4-([1,3,4]thiadiazol-2-ylazo)-naphthalene-2,7-disulfonic acid

Conditions

Conditions	Yield
With nitrosylsulfuric acid; sulfuric acid Rate constant; 1.) -10 deg C; 2.) buffer solution; study at different pH;

...Expand

: 7552-07-0
1,3,4-thiadiazol-5-amine

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

A: 2007-19-4
1-nitroso-2-naphthol-3,6-disulfonic acid

B: 3-Hydroxy-4-([1,2,4]thiadiazol-5-ylazo)-naphthalene-2,7-disulfonic acid

Conditions

Conditions	Yield
With nitrosylsulfuric acid; sulfuric acid Rate constant; 1.) -10 deg C; 2.) buffer solution; study at different pH;

...Expand

: 17720-99-9
4-aminothiazole

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

A: 2007-19-4
1-nitroso-2-naphthol-3,6-disulfonic acid

B: 3-Hydroxy-4-(thiazol-4-ylazo)-naphthalene-2,7-disulfonic acid

Conditions

Conditions	Yield
With sulfuric acid; sodium nitrite Rate constant; 1.) -10 deg C, 1h; 2.) buffer solution; study at different pH;

...Expand

: 61-82-5
3(5)-amino-1,2,4-triazole

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

A: 2007-19-4
1-nitroso-2-naphthol-3,6-disulfonic acid

B: 3-Hydroxy-4-(4H-[1,2,4]triazol-3-ylazo)-naphthalene-2,7-disulfonic acid

Conditions

Conditions	Yield
With nitrosylsulfuric acid; sulfuric acid Rate constant; Mechanism; 1.) -10 deg C; 2.) buffer solution; study at different pH;

...Expand

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 19183-06-3
2-hydroxyphenyldiazonium chloride

: C16H10N2O8S2(2-)*2Na(1+)

Conditions

Conditions	Yield
With sodium hydroxide In water at 0℃; for 1h;

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 74403-07-9
C25H45N3(2+)*2Br(1-)

: C35H50N3O7S2(1-)*Na(1+)

Conditions

Conditions	Yield
With Tris buffer; potassium chloride at 15℃; Kinetics; Rate constant;
With Tris buffer; potassium chloride at 15℃;

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: C40H75N3(2+)*2Br(1-)

: C50H80N3O7S2(1-)*Na(1+)

Conditions

Conditions	Yield
With Tris buffer; potassium chloride at 15℃; Kinetics; Rate constant;
With Tris buffer; potassium chloride at 15℃;

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 525-05-3
sodium 2-hydroxy-1-nitrosonaphtalene-3,6-disulphonate

Conditions

Conditions	Yield
With hydrogenchloride; sodium nitrite In sodium hydroxide at 0℃;

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 79-11-8
chloroacetic acid

: 54736-54-8
3,6-disulphonaphthoxyacetic acid

Conditions

Conditions	Yield
With sodium hydroxide for 1.25h; Heating;

: 538-41-0, 98043-56-2, 137692-67-2
4-[(E)-(4-aminophenyl)diazenyl]phenylamine

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

: 8',12',16',18',27',31',35',37'-octamethoxy-1,1,1'',1''-tetraethyldispiro(piperidinium-4,13'-[1,6,20,25]tetraoxa[6.1.6.1]paracyclophane-32',4''-piperidinium) dichloride

: 2C58H84N2O12(2+)*C32H18N6O14S4(4-)

Conditions

Conditions	Yield
Multistep reaction;

...Expand

: 538-41-0, 98043-56-2, 137692-67-2
4-[(E)-(4-aminophenyl)diazenyl]phenylamine

: 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt

A: C36H60O30*C32H18N6O14S4(4-)*4Na(1+)

B: C32H18N6O14S4(4-)*4Na(1+)

Conditions

Conditions	Yield
Multistep reaction. Yields of byproduct given;

...Expand

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 SO_x and Na₂O.
Hazard Codes: Irritant Xi
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.

Product Name

Disodium 2-naphthol-3,6-disulfonate

Synthetic route

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

Disodium 2-naphthol-3,6-disulfonate Uses

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

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

Disodium 2-naphthol-3,6-disulfonate Specification

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