Naphthalene-2,6-disulfonic acid
- CAS NO.：581-75-9
- Empirical Formula: C10H8O6S2
- Molecular Weight: 288.3
- MDL number: MFCD00065331
- EINECS: 209-471-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 05:56:47
What is Naphthalene-2,6-disulfonic acid ?
The Uses of Naphthalene-2,6-disulfonic acid
Naphthalene-2,6-disulfonic Acid can be used in in geothermal reservoirs as new fluorescent tracers.
Production Methods
Naphthalene is added to sulfuric acid – monohydrate (SO3 H2O) mixture at 135 ℃, and the reaction is completed by heating at 170 – 175 ℃ for 5 h. After quenching in water, the disodium salt of Naphthalene-2,6-disulfonic acid is precipitated at 90 C by adding sodium chloride and sodium sulfate. Filtration at 95℃ followed by washing with sodium sulfate solution gives the required product, free from the 2,7-isomer, in 21 % yield. The 2,7-isomer is then isolated from the filtrates.
Definition
ChEBI: Naphthalene-2,6-disulfonic acid is a naphthalenesulfonic acid.
Properties of Naphthalene-2,6-disulfonic acid
| Density | 1.704±0.06 g/cm3(Predicted) |
| storage temp. | 2-8°C |
| pka | -0.41±0.40(Predicted) |
| CAS DataBase Reference | 581-75-9(CAS DataBase Reference) |
| EPA Substance Registry System | 2,6-Naphthalenedisulfonic acid (581-75-9) |
Safety information for Naphthalene-2,6-disulfonic acid
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P310:Immediately call a POISON CENTER or doctor/physician. |
Computed Descriptors for Naphthalene-2,6-disulfonic acid
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