| Identification | More | [Name]
1,5-Naphthalenedisulfonic acid | [CAS]
81-04-9 | [Synonyms]
1,5-NAPHTHALENEDISULFONIC ACID
1,5-NAPHTHALENEDISULFONIC ACID DISODIUM SALT
1,5-NAPHTHALENEDISULFONIC ACID DISODIUM SALT HYDRATE
1,5-NAPHTHALENE DISULFONIC ACID DISUDIUM SALT
1,5-NAPHTHALENEDISULFONIC ACID, NA SALT
1,5-NAPHTHALENE DISULFONIC ACID SODIUM SALT
1,5-NAPHTHALENE DISULPHONATE
1,5-NAPHTHALINEDISULFONIC ACID
ARMSTRONG ACID
DISODIUM 1,5-NAPHTHALENEDISULFONATE
DISODIUM 1,5-NAPHTHALENEDISULFONATE HYDRATE
DISODIUM NAPHTHALENE-1,5-DISULPHONATE
NAPHTHALENE-1,5-DISULFONIC ACID DISODIUM SALT
naphthalene-1,5-disulphonic acid
SODIUM 1,5-NAPHTHALENEDISULFONATE DIBASIC
1,5-Naphthalenedisulphonicacid
1,5-naphthylenedisulfonicacid
2-Naphthylaminedisulfonicacid
1,5-NAPHTHALENEDISULFONIC ACID 97+%
Naphthalene-γ-disulfonic acid | [EINECS(EC#)]
216-732-0 | [Molecular Formula]
C10H8O6S2 | [MDL Number]
MFCD00064178 | [Molecular Weight]
288.3 | [MOL File]
81-04-9.mol |
| Chemical Properties | Back Directory | [Melting point ]
242.5°C (rough estimate) | [Boiling point ]
400.53°C (rough estimate) | [density ]
1.7040 | [vapor pressure ]
0Pa at 25℃ | [refractive index ]
1.5630 (estimate) | [storage temp. ]
Store below +30°C. | [pka]
-0.60±0.40(Predicted) | [color ]
Crystals or plates | [Water Solubility ]
90.52g/L at 25℃ | [LogP]
-0.94 | [CAS DataBase Reference]
81-04-9(CAS DataBase Reference) | [EPA Substance Registry System]
81-04-9(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns. | [Safety Statements ]
S22:Do not breathe dust .
S24/25:Avoid contact with skin and eyes .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . | [RIDADR ]
UN 2585 | [WGK Germany ]
1
| [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
2904100090 | [Toxicity]
LD50 orl-rat: 30 g/kg GISAAA 45(3),73,80 |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
Sulfuric acid-->Naphthalene-->4-aminonaphthalene-1,5-disulphonic acid-->Chlorosulfonic acid | [Preparation Products]
Direct Blue 71-->1,5-Dihydroxy naphthalene-->Reactive Red M-3BE-->trisodium 2-[[6-[(4,6-dichloro-1,3,5-triazin-2-yl)methylamino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate-->trisodium 2-[[6-[(4-amino-6-chloro-1,3,5-triazin-2-yl)methylamino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate-->NAPHTHALENE-1,7-DISULFONIC ACID-->1,6-Naphthalenedisulfonic acid-->Naphthalene-2-sulfonic acid-->Disodium 1,5-naphthalenedisulfonate |
| Hazard Information | Back Directory | [Chemical Properties]
White powder | [Uses]
The disodium salt of naphthalene-1,5- disulfonic acid gives 1-hydroxynaphthalene-5- sulfonic acid or 1,5-dihydroxynaphthalene (see Section 3.3) by fusion processes. Further sulfonation of the disulfonated reaction mixture gives naphthalene-1,3,5-trisulfonic acid, and nitration leads to 1- and 2-nitronaphthalene-4,8-disulfonic acids as intermediates to the corresponding aminonaphthalene disulfonic acids. Naphthalene-1,5-disulfonic acid is an important stabilizer for diazo compounds. | [Definition]
ChEBI: Naphthalene-1,5-disulfonic acid is a naphthalenesulfonic acid. | [Production Methods]
Naphthalene is mixed with 20 % oleum at 20 – 35 C followed by gradual addition of 65 % oleum and further naphthalene alternately. After heating for 6 h at 55 C the reaction mixture is added to water, and the product is precipitated as the free acid by cooling or as the disodium salt by the addition of alkaline sodium sulfate. In each case, the isolated yield is ca. 53 %. The 1,6-disulfonic acid can be recovered from the filtrate. Higher yields of 4 have been reported for alternative processes; for example, solvent sulfonation with sulfur trioxide and chlorosulfonic acid in a solvent such as tetrachloroethylene [24] or sulfonation with oleum through a double screw-feed apparatus. | [Flammability and Explosibility]
Notclassified | [Safety Profile]
Very low oral toxicity. Whenheated to decomposition it emits toxic fumes of SOx. Seealso SULFONATES. |
|
|