2-Methylnaphthalene
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2-Methylnaphthalene
structure -
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CAS No:
91-57-6
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Formula:
C11H10
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Chemical Name:
2-Methylnaphthalene
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Synonyms:
Naphthalene,2-methyl-;2-Methylnaphthalene;β-Methylnaphthalene;NSC 3575
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CAS No:
Characteristics
0
3.86
White Crystalline Low Melting Solid
0.99 g/cm3
37-38 °C
241.1 °C
208 °F
1.617
H2O: 0.00246 g/100 mL
2-8°C
Vapour pressure, Pa at °C: 9
Oral-Rat LD50: 163 mg/kg; Abdominal cavity-mouse LDL0: 1000 mg/kg
Inflammable in case of open flame, high temperature, oxidant; burning produces irritating smoke
Safety Information
III
9
UN 3077 9/PG 3
2
22-36/37/38-51/53-63-43-23/24/25-45-20/21/22-67-40
26-37/39-61-36/37-24/25-23-53-36-29
QJ9635000
Xn,N,T
Treasury is ventilated, low temperature and dry; stored separately from oxidant
Stable. Incompatible with strong oxidizing agents.
P210-P260-P280-P301 + P310-P311
H225-H301 + H311 + H331-H370
2-Methylnaphthalene Use and Manufacturing
2-Methylnaphthalene mainly exists in naphthalene oil fraction (content about 5.48%) and washing oil fraction (content about 8.11%). 1. The narrow fraction that can be crystallized at 237-241°C obtained by distillation of methyl naphthalene fraction is used to prepare 2-methyl naphthalene by freezing crystallization. It is melted at 40-45°C and filtered to obtain 2-methylnaphthalene with a purity of over 97%. 2. It contains about 1.0%-1.8% in high temperature tar. Using washing oil in coal tar as raw material, after dephenolization and depyridine alkalization, a 240-245°C methylnaphthalene fraction is cut out by rectification, and frozen to -20°C. At this time, 2-methylnaphthalene crystallizes out. Then it is refined by sweat crystallization or methanol and ethanol recrystallization to obtain the product.
Production of vitamin K3, preparation of oral contraceptives, synthesis of plant growth inhibitors, textile printing and dyeing aids, surfactants, important intermediates of feed additives, and β-methylnaphthoquinone as electron transporters to participate in the photosynthesis of organisms and can also be synthesized A variety of biologically active pharmaceutical products.
Computed Properties
Molecular Weight:142.20
XLogP3:3.9
Exact Mass:142.078250319
Monoisotopic Mass:142.078250319
Heavy Atom Count:11
Complexity:128
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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