Naphthalene-2,6-disulfonic acid Chemical Properties

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

RIDADR 

1759

HazardClass 

8

PackingGroup 

III

HS Code 

2904100090

Naphthalene-2,6-disulfonic acid Usage And Synthesis

Uses

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.

Naphthalene-2,6-disulfonic acid (581-75-9)Related Product Information

• Sodium diphenylamine-4-sulfonate
• Naphthalene-2-sulfonic acid
• Naphthalene
• Sodium xylenesulfonate
• Dihydroergotoxine mesylate
• 1,5-Naphthalenedisulfonic acid
• POLYVINYL CHLORIDE, AMINATED
• Disodium 2-naphthol-3,7-disulfonate
• 2,6-Naphthalenedisulfonic acid disodium salt
• ACID ORANGE 45
• Ponceau S
• 2-Amino-4,8-naphthalenedisulfonic acid
• 7-Amino-1,3-naphthalenedisulfonic acid
• Dipotassium 7-hydroxynaphthalene-1,3-disulphonate
• Acid Red 18
• Acid chrome blue K
• 1,2-DIAMINO NAPHTHALENE-5,7-DISULFONIC ACID
• SIRIUS ORANGE G