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| CAS No.: | 525-05-3 |
|---|---|
| Name: | 1-NITROSO-2-NAPHTHOL-3,6-DISULFONIC ACID DISODIUM SALT |
| Article Data: | 1 |
| Molecular Structure: | |
|
|
|
| Formula: | C10H5NNa2O8S2 |
| Molecular Weight: | 377.263 |
| Synonyms: | 2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-nitroso-, disodium salt (7CI,8CI,9CI);1-Nitroso-3,6-disulfo-2-naphthol disodium salt;Disodium1-nitroso-2-naphthol-3,6-disulfate;Disodium3-hydroxy-4-nitrosonaphthalene-2,7-disulfonate;Nitroso R;Nitroso red salt;Nitroso-R salt; |
| EINECS: | 208-369-1 |
| Melting Point: | >300 °C(lit.) |
| Solubility: | almost transparency |
| Appearance: | yellowish-orange to yellow-brown cryst. powder |
| Hazard Symbols: |
 Xn
|
| Risk Codes: | 20/21/22 |
| Safety: | 22-24/25 |
| PSA: | 180.82000 |
| LogP: | 2.91310 |
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Chemistry
IUPAC Name: Disodium 3-hydroxy-4-nitrosonaphthalene-2,7-disulfonate
The MF of Disodium 3-hydroxy-4-nitrosonaphthalene-2,7-disulfonate (525-05-3) is C10H5NNa2O8S2.
The MW of Disodium 3-hydroxy-4-nitrosonaphthalene-2,7-disulfonate (525-05-3) is 377.26.
Synonyms of Disodium 3-hydroxy-4-nitrosonaphthalene-2,7-disulfonate (525-05-3): 1-Nitroso-2-naphthol-3,6-disulfonic acid disodium salt ; 1-Nitroso-3,6-disulfonate ; 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-nitroso-, disodium salt ; 3-Hydroxy-4-nitroso-2,7-naphthalenedisulfonic acid disodium salt ; Disodium 1-nitroso-2-naphthol-3,6-disulfonate ; Disodium 3-hydroxy-4-nitrosonaphthalene-2,7-disulphonate
Product Categories: Intermediates of Dyes and Pigments
Form: yellowish-orange to yellow-brown cryst,powder
Melting Point: >300 °C
Merck: 14,6644
BRN: 3643930
EINECS: 208-369-1
Uses
Disodium 3-hydroxy-4-nitrosonaphthalene-2,7-disulfonate (525-05-3) is the most sensitive determination of trace cobalt reagents used for determination of cobalt and potassium-sensitive reagents.
Production
The R salt dissolved in water, by adding concentrated hydrochloric acid, cooling to 5 ℃. In the intense stirring, slowly stirring, slowly dropping pre-cooled sodium nitrite solution. Add complete, continue stirring 15min. Filtration, washed with impurities, coupled with ethanol, washed once that is very pure.
Toxicity Data With Reference
| 1. | ivn-mus LD50:320 mg/kg | CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) NX#05619 . |
Consensus Reports
Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.
Safety Profile
Poison by intravenous route. When heated to decomposition it emits very toxic fumes of NOx, Na2O, and SOx. See also SULFONATES.
Safety information of Disodium 3-hydroxy-4-nitrosonaphthalene-2,7-disulfonate (525-05-3):
Hazard Codes 
Xn
Risk Statements
20/21/22 Harmful by inhalation, in contact with skin and if swallowed
Safety Statements
22 Do not breathe dust
24/25 Avoid contact with skin and eyes
WGK Germany 3
RTECS QJ6480000
Specification
Handling: Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Storage: Store in a cool, dry place. Store in a tightly closed container.