其水溶液呈酸性,具有腐蚀性。水解后生成棕色絮状氢氧化铁,表现出极强的凝聚能力。在空气中易潮解且吸湿性强,能形成2、2.5、3.5、6水合物。它是一种强氧化剂,与铜、锌等金属会发生氧化还原反应,并能与多种溶剂生成络合物。与亚铁氰化钾反应会生成深蓝色的普鲁士蓝。工作人员应做好防护措施,若不慎触及皮肤,应立即用流动清水冲洗。该物质应与其他金属粉末、易燃或可燃物以及还原剂等分开存放。无水三氯化铁能溶于多种溶剂,特别是能够与之形成络合物的溶剂,如醇类、醚类、酮类、吡啶、苯甲腈、三溴化磷、二氧化硫和氯化硫酰。在空气中加热时会生成氧化铁和氯。
在稍低于熔点的温度下可使之升华。通过测定蒸气密度可知,在440℃时为二聚体,高于750℃时为单体,但在此温度以上将发生放氯反应。与潮湿空气接触时,无水三氯化铁会很容易转化为黄棕色的六水合物。因此,如果需要从一个容器转移到另一仪器中,应在干燥箱中进行操作,或依照Bergstrom[28]的方法进行。
稳定性:稳定
聚合危害:不聚合
分解产物:氯化物
国标编号: | 81513 |
CAS: | 7705-08-0 |
中文名称: | 三氯化铁 |
英文名称: | Ferric trichloride;Ferric chloride |
别 名: | 氯化铁 |
分子式: | FeCl 3 |
分子量: | 162.21 |
熔 点: | 306℃ |
密 度: | 相对密度(水=1)2.90; |
蒸汽压: | |
溶解性: | 易溶于水,不溶于革油,易溶于甲醇、乙醇、丙酮、乙醚 |
稳定性: | 稳定 |
外观与性状: | 黑棕色结晶,也有薄片状 |
危险标记: | 20(酸性腐蚀品) |
用 途: | 用作饮水和废水的处理剂,染料工业的氧化剂和媒染剂,有机合成的催化剂和氧化剂 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
氟化铁 | iron(III) fluoride | 7783-50-8 | F3Fe | 112.842 |
盐酸 | hydrogenchloride | 7647-01-0 | ClH | 36.4609 |
氢气 | hydrogen | 1333-74-0 | H2 | 2.01588 |
三氯化铝 | aluminium trichloride | 7446-70-0 | AlCl3 | 133.341 |
四氯化钛 | titanium tetrachloride | 7550-45-0 | Cl4Ti | 189.692 |
水 | water | 7732-18-5 | H2O | 18.0153 |
氯化亚铁 | iron(II)chloride | 7758-94-3 | Cl2Fe | 126.753 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
盐酸 | hydrogenchloride | 7647-01-0 | ClH | 36.4609 |
氟化铁 | iron(III) fluoride | 7783-50-8 | F3Fe | 112.842 |
五氯化铌 | niobium pentachloride | 10026-12-7 | Cl5Nb | 270.171 |
三氯化铝 | aluminium trichloride | 7446-70-0 | AlCl3 | 133.341 |
硫化氢 | hydrogen sulfide | 7783-06-4 | H2S | 34.0819 |
氨 | ammonia | 7664-41-7 | H3N | 17.0305 |
氢气 | hydrogen | 1333-74-0 | H2 | 2.01588 |
氯化铋 | bismuth(III) chloride | 7787-60-2 | BiCl3 | 315.339 |
—— | selenium | 7782-49-2 | Se | 78.96 |
四氯化锡 | tin(IV) chloride | 7646-78-8 | Cl4Sn | 260.522 |
氯化亚铁 | iron(II)chloride | 7758-94-3 | Cl2Fe | 126.753 |
氯化亚铜 | copper(I) chloride | 7758-89-6 | ClCu | 98.999 |
氯化铅 | PbCl2 | 7758-95-4 | Cl2Pb | 278.106 |
无水氯化铜 | copper(II) chloride | 7447-39-4 | Cl2Cu | 134.452 |
氯化锌 | Zinc chloride | 7646-85-7 | Cl2Zn | 136.296 |
甲烷 | pyrographite | 74-82-8 | C | 12.011 |
氯化银 | silver(I) chloride | 7783-90-6 | AgCl | 143.321 |
亚锑氢化物 | antimony | 7803-52-3 | Sb | 121.75 |
水 | water | 7732-18-5 | H2O | 18.0153 |
溴化铁(III) | iron (III) bromide | 10031-26-2 | Br3Fe | 295.559 |
Ochratoxin A (OTA, 1: X = Cl) is a fungal carcinogen that facilitates single-strand DNA cleavage and DNA adduction when metabolically activated. To determine if redox-active transition metals induce OTA-mediated DNA damage, we have examined the toxin's ability to bind Cu(II) and Fe(III) in aqueous media and facilitate DNA cleavage in their presence using agarose gel electrophoresis and supercoiled plasmid DNA. Using fluorescence spectroscopy, 1 was found to bind Cu(II) readily at physiological pH, while acidic conditions (pH 2.6) were employed to study Fe(III) binding due to the formation of Fe-oxide precipitates at higher pH values. Structure-activity relationships employing synthetic derivatives of 1 implied that 1 binds both Cu(II) and Fe(III) by its phenolic oxygen, while the carboxylic acid of its phenylalanine moiety binds Cu(II), but does not appear to play a role in Fe(III) coordination at pH 2.6. In terms of metal-mediated DNA cleavage, no role for 1 could be detected in Fe-induced DNA strand scission. With Cu(II), DNA cleavage by the 1:1 copper-bound complex of 1 could only be initiated by addition of a suitable reducing agent (sodium ascorbate). However, 1 was found to facilitate DNA cleavage by the Cu(II) complex of 1,10-phenanthroline (Cu(OP)2); a prototypical Cu-mediated nuclease system that cleaves DNA upon activation by an external reducing agent. Structure-activity relationships employing analogs lacking the chlorine atom, ochratoxin B (2: X = H), and the lactone (12), indicated that the chlorine atom is essential for activity of the OTA in potentiating DNA cleavage by Cu(OP)2. The implications of our findings to the genotoxic properties of 1 are discussed.Key words: ochratoxin, DNA cleavage, copper, iron, 1,10-phenanthroline.
Alcohols were converted to the corresponding THP, THF or TMS ethers in high to excellent yields in 1-n-butylpyridinium chloroferrate media as a stable and low cost room temperature ionic liquid. In addition, oxidation of these ethers to their aldehydes or ketones without any overoxidation reactions in this ionic liquid was also performed.