Copper chromite | 12053-18-8

• 物质功能分类: 有机原料 - 羧酸类化合物及衍生物
• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 过渡金属氧阴离子化合物
• 英文名称: Copper chromite
• 英文别名: oxocopper;oxo(oxochromiooxy)chromium
• CAS: 12053-18-8
• 化学式: Cr2Cu2O5
• 分子量: 311.08
• InChiKey: JGDFBJMWFLXCLJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.55
• 重原子数：
  9
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  77.5
• 氢给体数：
  0
• 氢受体数：
  5

ADMET

代谢

铜主要通过消化道吸收，但也可以通过吸入和皮肤吸收。它通过基底外侧膜，可能通过调节铜转运蛋白，并与血清白蛋白结合被运输到肝脏和肾脏。肝脏是铜稳态的关键器官。在肝脏和其他组织中，铜以与金属硫蛋白、氨基酸以及与依赖铜的酶相关联的形式储存，然后分配通过胆汁排泄或并入细胞内和细胞外蛋白中。铜通过血浆中与血清白蛋白、铜蓝蛋白或低分子量复合物结合被运输到外周组织。铜可能会诱导金属硫蛋白和铜蓝蛋白的产生。膜结合的铜转运腺苷三磷酸酶（Cu-ATPase）将铜离子运输进出细胞。体内生理正常水平的铜通过改变铜的吸收速率和数量、分布和排泄来保持恒定。铬通过口服、吸入或皮肤暴露吸收，并分布到几乎所有组织中，肾脏和肝脏中浓度最高。骨骼也是主要的储存部位，可能有助于长期保留。六价铬与硫酸盐和铬酸盐的相似性使其能够通过硫酸盐转运机制进入细胞。在细胞内，六价铬首先被包括抗坏血酸、谷胱甘肽和烟酸腺嘌呤二核苷酸等多种物质还原为五价铬，然后还原为三价铬。铬几乎全部通过尿液排出。(A12, L16, L277, L279)

Copper is mainly absorbed through the gastrointestinal tract, but it can also be inhalated and absorbed dermally. It passes through the basolateral membrane, possibly via regulatory copper transporters, and is transported to the liver and kidney bound to serum albumin. The liver is the critical organ for copper homoeostasis. In the liver and other tissues, copper is stored bound to metallothionein, amino acids, and in association with copper-dependent enzymes, then partitioned for excretion through the bile or incorporation into intra- and extracellular proteins. The transport of copper to the peripheral tissues is accomplished through the plasma attached to serum albumin, ceruloplasmin or low-molecular-weight complexes. Copper may induce the production of metallothionein and ceruloplasmin. The membrane-bound copper transporting adenosine triphosphatase (Cu-ATPase) transports copper ions into and out of cells. Physiologically normal levels of copper in the body are held constant by alterations in the rate and amount of copper absorption, compartmental distribution, and excretion. Chromium is absorbed from oral, inhalation, or dermal exposure and distributes to nearly all tissues, with the highest concentrations found in kidney and liver. Bone is also a major storage site and may contribute to long-term retention. Hexavalent chromium's similarity to sulfate and chromate allow it to be transported into cells via sulfate transport mechanisms. Inside the cell, hexavalent chromium is reduced first to pentavalent chromium, then to trivalent chromium by many substances including ascorbate, glutathione, and nicotinamide adenine dinucleotide. Chromium is almost entirely excreted with the urine. (A12, L16, L277, L279)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 毒性总结

过量的铜被储存在肝细胞溶酶体中，在那里它与金属硫蛋白结合。当溶酶体饱和，铜在细胞核中积累，导致核损伤时，铜的肝脏毒性被认为会发生。这种损伤可能是由于氧化损伤，包括脂质过氧化。铜抑制了诸如葡萄糖-6-磷酸1-脱氢酶、谷胱甘肽还原酶和对氧磷酶等含有巯基团的酶，这些酶保护细胞免受自由氧自由基的损害。它还影响基因表达，并且是诸如细胞色素C氧化酶和赖氨氧化酶等氧化酶的辅因子。此外，由铜引起的氧化应激被认为会激活酸性鞘磷脂酶，导致神经酰胺的产生，这是一种凋亡信号，同时也会引起溶血性贫血。铜诱导的呕吐是由于迷走神经的刺激。三价铬也可以与肽、蛋白质和DNA形成复合物，导致DNA-蛋白质交联、DNA链断裂、DNA-DNA链间交联、铬-DNA加合物、染色体畸变和细胞信号通路的变化。它已被证明可以通过过度刺激细胞调节通路和通过激活某些丝裂原活化蛋白激酶来增加过氧化物的水平，从而诱导癌变。它还可以通过将组蛋白去乙酰化酶1-DNA甲基转移酶1复合物与CYP1A1启动子染色质交联，抑制组蛋白修饰，从而引起转录抑制。铬可能通过修饰金属调节转录因子1，导致抑制锌诱导的金属硫蛋白转录，从而增加其自身的毒性。(A12, L16, A34, A35, A36, L277, T49, A174, L280)

Excess copper is sequestered within hepatocyte lysosomes, where it is complexed with metallothionein. Copper hepatotoxicity is believed to occur when the lysosomes become saturated and copper accumulates in the nucleus, causing nuclear damage. This damage is possibly a result of oxidative damage, including lipid peroxidation. Copper inhibits the sulfhydryl group enzymes such as glucose-6-phosphate 1-dehydrogenase, glutathione reductase, and paraoxonases, which protect the cell from free oxygen radicals. It also influences gene expression and is a co-factor for oxidative enzymes such as cytochrome C oxidase and lysyl oxidase. In addition, the oxidative stress induced by copper is thought to activate acid sphingomyelinase, which lead to the production of ceramide, an apoptotic signal, as well as cause hemolytic anemia. Copper-induced emesis results from stimulation of the vagus nerve. Trivalent chromium may also form complexes with peptides, proteins, and DNA, resulting in DNA-protein crosslinks, DNA strand breaks, DNA-DNA interstrand crosslinks, chromium-DNA adducts, chromosomal aberrations and alterations in cellular signaling pathways. It has been shown to induce carcinogenesis by overstimulating cellular regulatory pathways and increasing peroxide levels by activating certain mitogen-activated protein kinases. It can also cause transcriptional repression by cross-linking histone deacetylase 1-DNA methyltransferase 1 complexes to CYP1A1 promoter chromatin, inhibiting histone modification. Chromium may increase its own toxicity by modifying metal regulatory transcription factor 1, causing the inhibition of zinc-induced metallothionein transcription. (A12, L16, A34, A35, A36, L277, T49, A174, L280)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 致癌物分类

3, 无法归类其对人类致癌性的类别。(L135)

3, not classifiable as to its carcinogenicity to humans. (L135)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 健康影响

人们每天必须吸收少量铜，因为铜对健康至关重要。然而，高水平的铜可能有害。极高的铜剂量可能对肝脏和肾脏造成损害，甚至导致死亡。铜可能引起敏感人群的过敏反应。

People must absorb small amounts of copper every day because copper is essential for good health, however, high levels of copper can be harmful. Very-high doses of copper can cause damage to your liver and kidneys, and can even cause death. Copper may induce allergic responses in sensitive individuals. (L278, L279)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 暴露途径

口服（L16）；吸入（L16）；皮肤给药（L16）

Oral (L16) ; inhalation (L16) ; dermal (L16)

来源:Toxin and Toxin Target Database (T3DB)

毒理性

• 症状

吸入高浓度的铜可以导致鼻和喉咙的刺激。摄入高浓度的铜可以引起恶心、呕吐、腹泻、头痛、眩晕和呼吸困难。

Breathing high levels of copper can cause irritation of the nose and throat. Ingesting high levels of copper can cause nausea, vomiting, diarrhea, headache, dizziness, and respiratory difficulty. (L278, L279)

来源:Toxin and Toxin Target Database (T3DB)

安全信息

• TSCA：
  Yes
• 危险等级：
  5.1
• 危险品标志：
  Xi,T,O
• 海关编码：
  2841500000
• WGK Germany：
  3
• 危险品运输编号：
  UN 1479