| Identification | More | [Name]
Naphthalene-2,6-disulfonic acid | [CAS]
581-75-9 | [Synonyms]
2,6-NAPHTHALENE DISULFONIC ACID
Naphthalene-2,6-disulfonic acid
naphthalene-2,6-disulphonic acid
Naphthalene-2,6-bissulfonic acid | [EINECS(EC#)]
209-471-9 | [Molecular Formula]
C10H8O6S2 | [MDL Number]
MFCD00065331 | [Molecular Weight]
288.3 | [MOL File]
581-75-9.mol |
| Hazard Information | Back Directory | [Uses]
Naphthalene-2,6-disulfonic Acid can be used in in geothermal reservoirs as new fluorescent tracers. | [Definition]
ChEBI: Naphthalene-2,6-disulfonic acid is a naphthalenesulfonic acid. | [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.
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