General Description
Colorless to pale purple crystals or lavender powder.
Reactivity Profile
1,5-NAPHTHALENEDIAMINE(2243-62-1) neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.
Air & Water Reactions
This chemical is sensitive to prolonged exposure to air. Insoluble in water.
Hazard
Questionable carcinogen.
Fire Hazard
Flash point data for this chemical are not available. 1,5-NAPHTHALENEDIAMINE is probably combustible.
Chemical Properties
GREY TO DARK BROWN POWDER
Uses
1,5-naphthalenediamine be used as intermediates for the synthesis of materials.
Uses
Aromatic amines likely to have high carcinogenic potency. QSARs of aromatic amines.
Definition
ChEBI: A naphthalenediamine compound having amino substituents in the 1- and 5-positions.
Production Methods
The 1979 estimated production volume was 50,000 kg in
Germany and Japan. The major use of the compound is
for the manufacture of 1,5-naphthalene diisocyanate and in
the production of polyurethane elastomers.
The potential for exposure to 1,5-naphthalenediamine may
be greatest for workers involved in the manufacture of 1,5-
naphthalene diisocyanate, which is known to hydrolyze
readily to 1,5-naphthalenediamine upon contact with water.
Purification Methods
Recrystallise the amino-naphthalene from boiling H2O, but this is wasteful due to poor solubility. Boil it in chlorobenzene (charcoal), filter hot and cool the filtrate (preferably under N2). This gives colourless crystals. Dry it in a vacuum till free from chlorobenzene (odour), and store it in sealed ampoules under N2 away from light. [Beilstein 13 IV 340.]
