Thymolphthalein

Thymolphthalein

沉阳市, 中国
沉阳市, 中国
公司
86-24-89151533
Eric Li
联系人姓名

基本信息

化学文摘社编号. 125-20-2
其他的名字 3
小额信贷 C28H30O4
Einecs编号没了 204-729-7
出生地 Liaoning China (Mainland)
纯洁的 reagent grade
牌子的名字 PANDENG
模式的数量 AR
分类 总的试剂
Thymolphthalein 1.Photo: 2.Properties:White or straw yellow powder,insolve in water,solve in alcohol. 3. Molecular FormulaC28H30O4Molecular Weight430.54PH change range9.3 ( colorless)-- 10.5(blue)Solubility in ethanolPasses testSulfated ash,percent≤1Solubility in sodium hydroxidePasses testMelting range251.0--255.0 oC 4.Describe: 1).Thymolphthalein is an acid-base (pH) indicator. Its transition range is at approximately pH 9.3-10.5. Below this pH, it is colorless; above this pH, it is blue. The molar extinction coefficient for the blue thymolphthalein dianion is 38000 M-1cm-1 at 595 nm. 2).It can be used to make a disappearing ink. Dissolve the thymolphthalein in alcohol solution and add sodium hydroxide (NaOH) dropwise until it turns blue. It can then be sprayed onto cloth. After several minutes, it will turn colorless. (Carbon dioxide from the air will react with the basic solution. When the pH drops below 9.3, the thymolphthalein turns colorless.) Such inscription can be turned visible again by submerging it in liquid of pH higher than 10.5. A similar pH indicator is phenolphthalein, which is colorless in acidic and neutral pH ranges and bright fuchsia at high (basic) pH. 5.Kindly note:We are the only manufacturer for this prodcut in China.

交货条款及包装

Packaging Detail: in fiber drum.each containing 25Kgs or 50 Kgs. Delivery Detail: 10 days on receipt of the order
端口: Dalian,Tianjin,Shanghai,Beijing,

付款条款

Letter of credit

Western Union

Фотографии

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