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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 | Soluble in water | 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 |
|
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; |
Disodium 2-naphthol-3,6-disulfonate Synthetic route
- 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt
| 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
| 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
| 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
| 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% |
| Conditions | Yield |
|---|---|
| In methanol at 20℃; for 0.166667h; | 70% |
- 135-51-3
3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt
| 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
| 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
| 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
| 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
| Conditions | Yield |
|---|---|
| With sodium carbonate | 6% |
Disodium 2-naphthol-3,6-disulfonate Chemical Properties
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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: 
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.
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