Nomenclature
CAS number: 119-64-2
1,2,3,4-Tetrahydronaphthalene; Tetranap.
C
10H
12; mol wt 132.20.
C 90.85%, H 9.15%.
Description and references
Prepd by catalytic hydrogenation of purified
naphthalene. Toxicity study: Smyth et al., Arch. Ind. Hyg. Occup. Med. 4, 119 (1951). See references under Decalin.
Properties
Liquid. Odor resembling that of a mixture of
benzene and menthol. d420 0.9702; d425 0.9662. Volatile with steam; mp -31.0°; bp760 207.2°; bp400 181.8°; bp200 157.2°; bp100 135.3°; bp60 121.3°; bp40 110.4°; bp20 93.8°; bp10 79.0°; bp5 65.3°; bp1.0 38.0°. nD20 1.54135; nD25 1.53919. Flash pt, open cup 171°F (77°C), closed cup 180°F (82°C). Insol in water; miscible with ethanol, butanol,
acetone, benzene, ether, chloroform, petr ether, Decalin; soluble
in methanol: 50.6% w/w. Prolonged, intimate contact with air may
cause the formn of tetralin peroxide which may cause explosion of
tetralin distn residues. Peroxide formn is prevented by the addn
of an antioxidant, such as hydroquinone. LD50 orally in rats: 2.86 g/kg (Smyth).Caution
Irritating to skin, eyes, mucous
membranes, and, in high concns, narcotic. In exptl animals has produced
cataracts: E. Browning, Toxicity and Metabolism
of Industrial Solvents (Elsevier, New York, 1965) pp 119-124.Use
Degreasing agent. Solvent for naphthalene, fats,
resins, oils, waxes, used instead of turpentine in lacquers, shoe
polishes, floor waxes.