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2-메틸나프탈렌

2-메틸나프탈렌
2-메틸나프탈렌 구조식 이미지
카스 번호:
91-57-6
한글명:
2-메틸나프탈렌
동의어(한글):
2-메틸나프탈렌;2-메틸나프탈렌(2-METHYLNAPHTHALENE)
상품명:
2-Methylnaphthalene
동의어(영문):
2-methyl;2-Methylnaphth;2-Methylphthalene;METHYLNAPHTHYLENE;2-Methylnaphthalin;2-METHYLNAPHTHALENE;2-methyInaphthalene;2-methyl-naphthalen;3-Methylnaphthalene;2-Methylnaphthaline
CBNumber:
CB5854626
분자식:
C11H10
포뮬러 무게:
142.2
MOL 파일:
91-57-6.mol

2-메틸나프탈렌 속성

녹는점
34-36 °C(lit.)
끓는 점
241-242 °C(lit.)
밀도
1.01
증기압
5.4 (extrapolated, Mackay et al., 1982)
굴절률
1.6019
인화점
208 °F
저장 조건
2-8°C
용해도
0.025g/l
물리적 상태
Crystalline Low Melting Solid
물리적 상태
Solid
색상
White
수용성
0.00246 g/100 mL
어는점
34.5℃
BRN
906859
Henry's Law Constant
6.13 at 25 °C (thermodynamic method-GC/UV spectrophotometry, Altschuh et al., 1999)
안정성
Stable. Incompatible with strong oxidizing agents.
InChIKey
QIMMUPPBPVKWKM-UHFFFAOYSA-N
CAS 데이터베이스
91-57-6(CAS DataBase Reference)
NIST
Naphthalene, 2-methyl-(91-57-6)
EPA
2-Methylnaphthalene (91-57-6)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 Xn,N,T
위험 카페고리 넘버 22-36/37/38-51/53-63-43-23/24/25-45-20/21/22-67-40
안전지침서 26-37/39-61-36/37-24/25-23-53-36-29
유엔번호(UN No.) UN 3077 9/PG 3
WGK 독일 2
RTECS 번호 QJ9635000
TSCA Yes
위험 등급 9
포장분류 III
HS 번호 29029080
유해 물질 데이터 91-57-6(Hazardous Substances Data)
독성 Acute oral LD50 for rats 1,630 mg/kg (quoted, RTECS, 1985).
그림문자(GHS):
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H225 고인화성 액체 및 증기 인화성 액체 구분 2 위험 P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H302 삼키면 유해함 급성 독성 물질 - 경구 구분 4 경고 P264, P270, P301+P312, P330, P501
H315 피부에 자극을 일으킴 피부부식성 또는 자극성물질 구분 2 경고 P264, P280, P302+P352, P321,P332+P313, P362
H319 눈에 심한 자극을 일으킴 심한 눈 손상 또는 자극성 물질 구분 2A 경고 P264, P280, P305+P351+P338,P337+P313P
H370 장기(또는, 영향을 받은 알려진 모든 장기를 명시)에 손상을 일으킴(노출되어도 특정 표적장기 독성을 일으키지 않는다는 결정적인 노출경로가 있다면 노출경로를 기재) 특정 표적장기 독성 - 1회 노출 구분 1 위험 P260, P264, P270, P307+P311, P321,P405, P501
H401 수생생물에 유독함 수생 환경유해성 물질 - 급성 구분 2 P273, P501
H411 장기적 영향에 의해 수생생물에 유독함 수생 환경유해성 물질 - 만성 구분 2
예방조치문구:
P210 열·스파크·화염·고열로부터 멀리하시오 - 금연 하시오.
P260 분진·흄·가스·미스트·증기·...·스프레이를 흡입하지 마시오.
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P311 의료기관(의사)의 진찰을 받으시오.
P321 (…) 처치를 하시오.
P301+P310 삼켰다면 즉시 의료기관(의사)의 진찰을 받으시오.
P305+P351+P338 눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.
P332+P313 피부 자극이 생기면 의학적인 조치· 조언을 구하시오.

2-메틸나프탈렌 MSDS


2-Methylnaphthalene

2-메틸나프탈렌 C화학적 특성, 용도, 생산

화학적 성질

Solid. Insoluble inwater; soluble in alcohol and ether. Combustible.

용도

Organic synthesis, insecticides.

정의

ChEBI: A methylnaphthalene carrying a methyl substituent at position 2.

생산 방법

Alkylnaphthalenes are formed as pyrolysis products in cigarette smoke. Some have been identified in commercial carbon paper. They are also the major components of the C10–C13 alkylnaphthalene concentrate fraction, which distills at 400–500F. A C11–C12 petroleum mixture of reformates that contained about 23% alkylnaphthalenes caused skin and eye effects. The toxicity of the alkylnaphthalenes to marine species is greater than that of the alkylbenzenes (85). The toxicity and the bioaccumulation increase with molecular weight. Nocardia cultures, isolated from soil, preferentially oxidized alkylnaphthalenes when methylated in the two positions. Methylnaphthalene can occur as the 1- or 2-, the alpha or the beta isomer. 1-Naphthalene, a flammable solid, has also been identified in the wastewater of coking operations, and in textile processing plants. Methylnaphthalene is used as a component in slow-release insecticides and in mole repellents. Workplace exposures to 18–32 mg/m3 for 2-methylnaphthalene have been reported.

일반 설명

White crystalline solid.

공기와 물의 반응

Insoluble in water.

반응 프로필

2-Methylnaphthalene is incompatible with strong oxidizing agents. 2-Methylnaphthalene is also incompatible with peroxides and oxygen.

위험도

Lower respiratory tract irritant and lungdamage. Questionable carcinogen.

화재위험

2-Methylnaphthalene is combustible.

Carcinogenicity

The carcinogenic potential of 1- and 2-methyl was investigated in B6C3F1 mice. Female and male mice were given methylnaphthalene in their diets for 81 weeks. The results indicated that 1-methyl was a possible weak carcinogen in the lung of male but not female mice whereas 2-methyl did not possess unequivocal carcinogenic potential in these mice.

Source

Detected in distilled water-soluble fractions of No. 2 fuel oil (0.42 mg/L), jet fuel A (0.17 mg/L), diesel fuel (0.27 mg/L), military jet fuel JP-4 (0.07 mg/L) (Potter, 1996), new motor oil (0.42 to 0.66 μg/L), and used motor oil (46 to 54 μg/L) (Chen et al., 1994). Present in diesel fuel and corresponding aqueous phase (distilled water) at concentrations of 3.5 to 9.0 g/L and 180 to 340 μg/L, respectively (Lee et al., 1992). Schauer et al. (1999) reported 2-methylnaphthalene in diesel fuel at a concentration of 980 μg/g and in a diesel-powered medium-duty truck exhaust at an emission rate of 511 μg/km.
Thomas and Delfino (1991) equilibrated contaminant-free groundwater collected from Gainesville, FL with individual fractions of three individual petroleum products at 24–25 °C for 24 h. The aqueous phase was analyzed for organic compounds via U.S. EPA approved test method 625. Average 2-methylnaphthalene concentrations reported in water-soluble fractions of unleaded gasoline, kerosene, and diesel fuel were 256, 354, and 267 μg/L, respectively.
California Phase II reformulated gasoline contained 2-methylnaphthalene at a concentration of 1.33 g/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were approximately 1.00 and 50.0 mg/km, respectively (Schauer et al., 2002).
Based on laboratory analysis of 7 coal tar samples, 2-methylnaphthalene concentrations ranged from 680 to 42,000 ppm (EPRI, 1990). Detected in 1-yr aged coal tar film and bulk coal tar at concentrations of 25,000 and 26,000 mg/kg, respectively (Nelson et al., 1996). A high-temperature coal tar contained 2-methylnaphthalene at an average concentration of 1.23 wt % (McNeil, 1983).
Lee et al. (1992a) equilibrated eight coal tars with distilled water at 25 °C. The maximum concentration of 2-methylnaphthalene observed in the aqueous phase is 1.4 mg/L.
Detected in wood-preserving creosotes at a concentration of 3.0 wt % (Nestler, 1974).
Typical concentration of 2-methylnaphthalene in a heavy pyrolysis oil is 7.4 wt % (Chevron Phillips, May 2003).
An impurity identified in commercially available acenaphthene (Marciniak, 2002).
Schauer et al. (2001) measured organic compound emission rates for volatile organic compounds, gas-phase semi-volatile organic compounds, and particle-phase organic compounds from the residential (fireplace) combustion of pine, oak, and eucalyptus. The gas-phase emission rates of 2-methylnaphthalene were 15.0 mg/kg of pine burned, 9.61 mg/kg of oak burned, and 5.69 mg/kg of eucalyptus burned.

환경귀착

Biological. 2-Naphthoic acid was reported as the biooxidation product of 2-methylnaphthalene by Nocardia sp. in soil using n-hexadecane as the substrate (Keck et al., 1989). Dutta et al. (1998) investigated the degradation of 2-methylnaphthalene using a bacterial strain of Sphingomonas paucimobilis grown on phenanthrene. Degradation products identified using GC-MS were 4- methylsalicylate, 2-methylnaphthoate, and 1-hydroxy-2-methylnaphthoate.
Estimated half-lives of 2-methylnaphthalene (0.6 μg/L) from an experimental marine mesocosm during the spring (8–16 °C), summer (20–22 °C), and winter (3–7 °C) were 11, 1.0, and 13 d, respectively (Wakeham et al., 1983).
Photolytic. Fukuda et al. (1988) studied the photodegradation of 2-methylnaphthalene and other alkylated naphthalenes in distilled water and artificial seawater using a high-pressure mercury lamp. Based upon an experimentally rate constant of 0.042/h, the photolytic half-life of 2- methylnaphthalene in water is 16.4 h.
Phousongphouang and Arey (2002) investigated gas-phase reaction of naphthalene with OH radicals in a 7-L Teflon chamber at 25 °C and 740 mmHg containing 5% humidity. The rate constant for this reaction was 4.86 x 10-11 cm3/molecule?sec.
Chemical/Physical. An aqueous solution containing chlorine dioxide in the dark for 3.5 d at room temperature oxidized 2-methylnaphthalene into the following: 1-chloro-2-methylnaphthalene, 3-chloro-2-methylnaphthalene, 1,3-dichloro-2-methylnaphthalene, 3-hydroxymethylnaphthalene, 2-naphthaldehyde, 2-naphthoic acid, and 2-methyl-1,4-naphthoquinone (Taymaz et al., 1979).

Purification Methods

Fractionally crystallise repeatedly from its melt, then fractionally distil under reduced pressure. It has been crystallised from *benzene and dried under vacuum in an Abderhalden pistol. It can be purified via its picrate (m 114-115o) or better via the 1,3,5-trinitrobenzene complex as for 1-methylnaphthalene (above). [Beilstein 5 IV 1693.]

2-메틸나프탈렌 준비 용품 및 원자재

원자재

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