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메틸나프탈렌

메틸나프탈렌
메틸나프탈렌 구조식 이미지
카스 번호:
90-12-0
한글명:
메틸나프탈렌
동의어(한글):
메틸나프탈렌;1-메틸나프탈렌
상품명:
1-Methylnaphthalene
동의어(영문):
FEMA 3193;femanumber3193;1-Methylnaphth;1-Methylnaphthene;1-Methylphthalene;1-methyl-naphthalen;A-METHYLNAPHTHALENE;1-METHYLNAPHTHALENE;1 Methyl Napthalene;1-METHYLNAPHTHYLENE
CBNumber:
CB4127653
분자식:
C11H10
포뮬러 무게:
142.2
MOL 파일:
90-12-0.mol

메틸나프탈렌 속성

녹는점
−22 °C(lit.)
끓는 점
240-243 °C(lit.)
밀도
1.001 g/mL at 25 °C(lit.)
증기압
2 hPa (25 °C)
FEMA
3193 | 1-METHYLNAPHTHALENE
굴절률
n20/D 1.615(lit.)
인화점
180 °F
저장 조건
2-8°C
용해도
0.026g/l
산도 계수 (pKa)
37(at 25℃)
물리적 상태
Liquid
색상
Clear colorless to yellow
폭발한계
0.7-6.5%(V)
수용성
0.026 g/L (25 ºC)
JECFA Number
1335
BRN
506793
안정성
Stable. Combustible. Incompatible with strong oxidizing agents, oxygen.
InChIKey
QPUYECUOLPXSFR-UHFFFAOYSA-N
CAS 데이터베이스
90-12-0(CAS DataBase Reference)
NIST
Naphthalene, 1-methyl-(90-12-0)
EPA
1-Methylnaphthalene (90-12-0)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 Xn,N,T
위험 카페고리 넘버 22-36/37/38-42/43-51/53-39/23/24/25-23/24/25-20/21/22
안전지침서 7-26-36/37/39-61-45-36/37-23-36
유엔번호(UN No.) UN 3082 9/PG 3
WGK 독일 2
RTECS 번호 QJ9630000
자연 발화 온도 984 °F
TSCA Yes
위험 등급 9
포장분류 III
HS 번호 29029080
유해 물질 데이터 90-12-0(Hazardous Substances Data)
독성 LD50 orally in Rabbit: 1840 mg/kg
그림문자(GHS):
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H227 가연성 액체 인화성 액체 구분 4 경고 P210, P280, P370+P378, P403+P235,P501
H302 삼키면 유해함 급성 독성 물질 - 경구 구분 4 경고 P264, P270, P301+P312, P330, P501
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:
P260 분진·흄·가스·미스트·증기·...·스프레이를 흡입하지 마시오.
P264 취급 후에는 손을 철저히 씻으시오.
P264 취급 후에는 손을 철저히 씻으시오.
P273 환경으로 배출하지 마시오.
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P311 의료기관(의사)의 진찰을 받으시오.
P391 누출물을 모으시오.
P301+P310 삼켰다면 즉시 의료기관(의사)의 진찰을 받으시오.
P403+P235 환기가 잘 되는 곳에 보관하고 저온으로 유지하시오.
P501 ...에 내용물 / 용기를 폐기 하시오.

메틸나프탈렌 MSDS


1-Methylnaphthalene

메틸나프탈렌 C화학적 특성, 용도, 생산

개요

1-Methylnaphthalene has an earthy, phenolic odor. 1-Methylnaphthalene is generally obtained from coal tar and petroleum oils.

화학적 성질

1-Methylnaphthalene has an earthy, phenolic odor

화학적 성질

Colorless liquid. Insoluble in water; soluble in alcoholand ether. Combustible.

출처

Reported found in apple, grape, peach, strawberry, onion, peas, bell pepper, Gruyere and parmesan cheese, milk, white wine, cocoa, coffee, tea, filberts, peanuts, oats, soybeans, Japanese plum, beans, starfruit, trassi, tamarind, rice, buckwheat, wild rice, endive, nectarine, lamb’s lettuce, okra, crayfish, rooibus tea (Aspalathus linearis), capsicum peppers and milk products. Methylnaphthalene was identified as a volatile component of cassava, roasted filberts and nectarines. Assorted types of lima, pinto, red kidney, black, navy and mung beans, soybeans, split peas and lentils were found to contain 1-methylnaphthalene at concentrations ranging from 2.8 to 49.2 ppb.

용도

Organic synthesis.

정의

ChEBI: A methylnaphthalene carrying a methyl substituent at position 1.

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.

제조 방법

Generally obtained from coal tar and petroleum oils.

Aroma threshold values

Detection: 7.5 to 20 ppb.

Taste threshold values

Taste characteristics at 1 ppm: naphthyl-like with a medicinal nuance.

일반 설명

Colorless liquid. Freezing point -22°C (7.6°F). Boiling point 240-243°C (464-469°F). Flash point 82°C (180°F). Denser than water. Derived from coal tar and used in organic synthesis.

공기와 물의 반응

Insoluble in water.

반응 프로필

1-Methylnaphthalene is sensitive to heat. Reacts with strong oxidizing agents. Incompatible with oxygen and peroxides .

위험도

Moderate fire risk. Lower respiratory tractirritant and lung damage. Questionable carcinogen.

건강위험

Harmful if inhaled. Liquid causes irritation of the eyes and skin and skin photosensitization. Harmful if swallowed. Chronic exposure may cause liver or kidney damage.

화재위험

1-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.

Purification Methods

Dry 1-methylnaphthalene for several days with CaCl2 or by prolonged refluxing with BaO. Fractionally distil it through a glass helices-packed column from sodium. Purify it further by solution in MeOH and precipitation of its picrate complex by adding to a saturated solution of picric acid in MeOH. The picrate, after crystallisation to constant melting point (m 140-141o) from MeOH, is dissolved in *benzene and extracted with aqueous 10% LiOH until the extract is colourless. Evaporation of the *benzene solution under vacuum gives 1-methylnaphthalene [Kloetzel & Herzog J Am Chem Soc 72 1991 1950]. However, neither the picrate nor the styphnate complexes satisfactorily separate 1-and 2-methylnaphthalenes. To achieve this, 2-methylnaphthalene (10.7g) in 95% EtOH (50mL) has been precipitated with 1,3,5-trinitrobenzene (7.8g) and this complex has been crystallised from MeOH to m 153-153.5o (m of the 2-methyl isomer is 124o). [Alternatively, 2,4,7-trinitrofluorenone in hot glacial acetic acid could be used, and the derivative (m 163-164o) is recrystallised from glacial acetic acid]. The 1-methylnaphthalene is regenerated by passing a soution of the complex in dry *benzene through a 15-in column of activated alumina and washing with *benzene/pet ether (b 35-60o) until the coloured band of the nitro compound had moved down near the end of the column. The complex can also be decomposed using tin and acetic-hydrochloric acids, followed by extraction with diethyl ether and *benzene; the extracts are washed successively with dilute HCl, strongly alkaline sodium hypophosphite, water, dilute HCl and water. [Soffer & Stewart J Am Chem Soc 74 567 1952.] It can be freed from anthracene by zone melting [Beilstein 5 IV 1687.]

메틸나프탈렌 준비 용품 및 원자재

원자재

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