水質分析用標準溶液 1,2,4-トリメチルベンゼン (1mg/mL メタノール溶液) 化学特性,用途語,生産方法
外観
無色～わずかにうすい黄色, 澄明の液体
溶解性
水に不溶 (＜10mg/L)。エタノール, ベンゼンに可溶。エタノール及びアセトンに極めて溶けやすく、水にほとんど溶けない。
用途
ガソリン添加剤、無水トリメリット酸、SD溶剤、染料、香料などの原料として使用される。
説明
1,2,4-Trimethylbenzene (mesitylene) is an aromatic hydrocarbon compound commonly present in commercial solvents encompassing their boiling range. Mesitylene are the most common isomer used in commercial applications. Aromatic hydrocarbons in hydrocarbon solvents are predominantly alkylated one ring structures as well as two aromatic ring structures which may also be alkylated.
化学的特性
colourless liquid. Insoluble in water, soluble in ethanol, ether and benzene.
物理的性質
Colorless liquid with a slight aromatic odor. A detection odor threshold concentration of 12 mg/m
3
(2.4 ppm
v) was experimentally determined by Dravnieks (1974).
使用
1,2,4-Trimethylbenzene is the unlabelled version of 1,2,4-Trimethyl 13C6-benzene (T796173), a labelled aromatic standard.
定義
ChEBI: 1,2,4-trimethylbenzene is a trimethylbenzene carrying methyl groups at positions 1, 2 and 4. It has a role as a neurotoxin.
一般的な説明
A liquid. Flash point near 130°F. Less dense than water and insoluble in water. Vapors irritate eyes, throat, and nose. Used in dyes and pharmaceuticals.
空気と水の反応
Insoluble in water.
反応プロフィール
1,2,4-Trimethylbenzene is incompatible with the following: Oxidizers, nitric acid .
危険性
Moderate fire risk. Central nervous system
depressant, irritant to mucous membranes. Asthma
and hematologic effects.
健康ハザード
Harmful if inhaled or swallowed. Vapor or mist is irritating to the eyes, mucous membrane and upper respiratory tract. Prolonged contact can cause dermatitis, nausea, headache, dizziness, and narcotic effect.
安全性プロファイル
Moderately toxic by
intraperitoneal route. Mildly toxic by
inhalation. Can cause central nervous system
depression, anemia, bronchitis. Flammable
liquid when exposed to heat, sparks, or
flame. To fight fire, use foam, alcohol foam,
mist. Emitted from modern building
materials (CENEAR 69,22,91). When
heated to decomposition it emits acrid
smoke and irritating fumes.
環境運命予測
Biological. In anoxic groundwater near Bemidji, MI, 1,2,4-trimethylbenzene anaerobically
biodegraded to the intermediate 3,4-dimethylbenzoic acid and the tentatively identified
compounds 2,4- and/or 2,5-dimethylbenzoic acid (Cozzarelli et al., 1990).
Photolytic. Glyoxal, methylglyoxal, and biacetyl were produced from the photooxidation of
1,2,4-trimethylbenzene by OH radicals in air at 25 °C (Tuazon et al., 1986a). A rate constant of
2.0 x 10
-8 L/molecule?sec was reported for the reaction of 1,2,4-trimethylbenzene with OH radicals
in the gas phase (Darnall et al., 1976). Similarly, the rate constants for the reaction of 1,2,4-
trimethylbenzene and OH radicals at room temperature were 3.35 x 10
-11 (Hansen et al., 1975) and
3.84 x 10
-11 cm
3/molecule?sec (Atkinson, 1985). At 25 °C, a rate constant of 3.15 x 10
-11
cm
3/molecule?sec was reported for the same reaction (Ohta and Ohyama, 1985). Products
identified from the OH radical-initiated reaction of 1,2,4-trimethylbenzene in the presence of
nitrogen dioxide were 3-hexene-2,5-dione and 2,3-butanedione (Bethel et al., 2000).
Chemical/Physical. 1,2,4-Trimethylbenzene will not hydrolyze in water (Kollig, 1993).
純化方法
Reflux pseudocumene over sodium and distil it under reduced pressure. [Beilstein 6 H 1088, 6 I 542, 6 II 1072, 6 III 6278, 6 IV 7339.]
水質分析用標準溶液 1,2,4-トリメチルベンゼン (1mg/mL メタノール溶液) 上流と下流の製品情報
原材料
準備製品
2,3,5-トリメチル-p-ベンゾキノン
トリメチルヒドロキノン
トリメリット酸
PSEUDOCUMENE-5-SULFONIC ACID
無水ピロメリト酸
トリメリット酸無水物
メシチレン
2,3,5-トリメチル-p-フェニレンジアミン
1,2,4,5-テトラメチルベンゼン
4-ピペラジノピリジン
4-ヒドロキシカルバゾール
ピロメリト酸
クリセン
2-メチル-2-ブテン
2,4,6-(TRIMETHYL)BENZYLCHLORIDE
2,4,6-トリメチルピリジン
5-ブロモ-1,2,4-トリメチルベンゼン