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p-トルイル酸

CAS番号. 99-94-5
化学名: p-トルイル酸
别名: p-トルイル酸;p-トルエン酸;4-メチル安息香酸;p-メチル安息香酸;4-メチルベンゼンカルボン酸;pトルイル酸;pメチル安息香酸
英語化学名: p-Toluic acid
英語别名: PTLA;p-toluic;p-Toluylsure;P-TOLUIC ACID;4-TOLUIC ACID;P-TOLUYLIC ACID;Crithminic acid;para-Toluic acid;P-ToluicAcid>98%;p-carboxytoluene
CBNumber: CB7854776
分子式: C8H8O2
分子量: 136.15
MOL File: 99-94-5.mol
p-トルイル酸 物理性質
融点 : 179 °C
沸点 : 274-275 °C(lit.)
比重(密度) : 1,06 g/cm3
屈折率 : 1.5120 (estimate)
闪点 : 181°C
貯蔵温度 : Store at RT.
溶解性: 0.3g/l
外見 : Powder
酸解離定数(Pka): 4.36(at 25℃)
色: White to slightly yellow-cream
水溶解度 : <0.1 g/100 mL at 19 ºC
Merck : 14,9535
BRN : 507600
安定性:: Stable. Incompatible with strong oxidizing agents, strong bases.
InChIKey: LPNBBFKOUUSUDB-UHFFFAOYSA-N
CAS データベース: 99-94-5(CAS DataBase Reference)
NISTの化学物質情報: Benzoic acid, 4-methyl-(99-94-5)
EPAの化学物質情報: Benzoic acid, 4-methyl-(99-94-5)
安全性情報
  • リスクと安全性に関する声明
  • 危険有害性情報のコード(GHS)
主な危険性  Xn
Rフレーズ  22
Sフレーズ  22-24/25
WGK Germany  1
RTECS 番号 XU1575000
TSCA  Yes
HSコード  29163900
絵表示(GHS)
注意喚起語
危険有害性情報
コード 危険有害性情報 危険有害性クラス 区分 注意喚起語 シンボル P コード
H303 飲み込むと有害のおそれ 急性毒性、経口 5 P312
H315 皮膚刺激 皮膚腐食性/刺激性 2 警告 P264, P280, P302+P352, P321,P332+P313, P362
H319 強い眼刺激 眼に対する重篤な損傷性/眼刺激 性 2A 警告 P264, P280, P305+P351+P338,P337+P313P
H335 呼吸器への刺激のおそれ 特定標的臓器毒性、単回暴露; 気道刺激性 3 警告
注意書き
P261 粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。
P304+P340 吸入した場合:空気の新鮮な場所に移し、呼吸しやすい 姿勢で休息させること。
P305+P351+P338 眼に入った場合:水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。
P405 施錠して保管すること。

p-トルイル酸 MSDS


p-Toluic acid

p-トルイル酸 化学特性,用途語,生産方法

化学的特性
colourless crystals or white crystalline powder
使用
Intermediates of Liquid Crystals
定義
ChEBI: A methylbenzoic acid in which the methyl substituent is located at position 4.
一般的な説明
White powder. Sublimes.
空気と水の反応
Fine dust dispensed in air in sufficient concentrations, and in the presence of an ignition source is a potential dust explosion hazard. . Insoluble in water.
反応プロフィール
p-Toluic acid is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in water; those with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in p-Toluic acid to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions. p-Toluic acid is incompatible with strong oxidizers. p-Toluic acid is also incompatible with strong bases. .
火災危険
Flash point data for p-Toluic acid are not available; however, p-Toluic acid is probably combustible.
純化方法
Crystallise the acid from water, water/EtOH (1:1), MeOH/water or *benzene. [Beilstein 9 IV 1724.] Aromatic acid impurities (to <0.05%) can be removed via the (±)--methylbenzylamine salt as described for 2,4-dichlorobenzoic acid [Ley & Yates Organic Process Research & Development 12 120 2008]. The S-benzylisothiuronium salt has m 164o (from aqueous EtOH).
p-トルイル酸 上流と下流の製品情報
原材料
p-キシレン (1mg/mlメタノール溶液) [水質分析用] 酸素 ナフテン酸コバルト 硝酸 (67%) [一般有機合成用] p-シメン
準備製品
4-ヒドロキシ-3-メチル安息香酸 4-(クロロメチル)安息香酸 4-(ブロモメチル)安息香酸 p-トルオイルクロリド 2,3,5,6-テトラフルオロ-4-メチルベンジルアルコ-ル
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99-94-5(p-トルイル酸) キーワード:
4-(ブロモメチル)安息香酸メチル p-トルイル酸 メチル 4-(メチルアミノ)安息香酸 p-トルイル酸 3-(トリフルオロメチル)安息香酸 4-ヒドロキシ安息香酸 p-アニス酸 p-トルイル酸エチル p-トルニトリル o-トルイル酸 m-トルイル酸 4-[メチルスルホニル]-2-ニトロ安息香酸 4-メトキシトルエン フェニル酢酸 グリシン [電気泳動用] 2-(トリフルオロメチル)安息香酸 4-(メチルスルホニル)安息香酸 葉酸水和物
99-94-5 p-Toluic acid 98% p-Toluic acid, CP,97% The Methyl benzoic acid p-Toluic acid Vetec(TM) reagent grade, 98% 4-methylbenzoic acid p-Toluic acid 4-Methylbenzoic acid for synthesis para-Toluic acid AKOS BBS-00003712 P-ToluicAcid>98% P-ToluicAcidForSynthesis PARA -TOLUIC ACID FOR SYNTHESIS 4-Methylbenzoic acid 98% p-Toluylsure 1% Divinylbenzene (DVB) cross-linked polystyrene, 100 - 200 mesh, 2.5 - 3.0mmol/g. p-Tolylcarboxylic acid 4-Toluic acid ,99% p-Toluic acid ,99% p-Toluic acid,4-Methylbenzoic acid 4-Carboxytoluene, p-Toluic acid p-Toluic acid, 98% 100GR p-carboxytoluene p-toluic P-METHYLBENZOIC ACID RARECHEM AL BO 0067 P-TOLUYLIC ACID P-TOLUIC ACID PTLA SUPPORTED BENZOIC ACID toluenecarboxylic acid Crithminic acid p-トルイル酸 p-トルエン酸 4-メチル安息香酸 p-メチル安息香酸 4-メチルベンゼンカルボン酸 pトルイル酸 pメチル安息香酸 安息香酸 (液晶原料) 機能性材料 液晶原料 代謝産物
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