98%
solid
>300 °C (lit.)
[Cl-].[Cl-].[H]O[H].C[n+]1ccc(cc1)-c2cc[n+](C)cc2
1S/C12H14N2.2ClH.H2O/c1-13-7-3-11(4-8-13)12-5-9-14(2)10-6-12;;;/h3-10H,1-2H3;2*1H;1H2/q+2;;;/p-2
RLGVBTFWTZJYIL-UHFFFAOYSA-L
Danger
Acute Tox. 2 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Irrit. 2 - Skin Irrit. 2 - STOT RE 1 - STOT SE 3
Respiratory system
6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
WGK 3
Not applicable
Not applicable
dust mask type N95 (US), Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges
输入产品批号来搜索 分析证书(COA) 。批号可以在产品标签上"批“ (Lot或Batch)字后找到。
为方便起见,与您过往购买产品相关的文件已保存在文档库中。
如何查找产品货号
在网站页面上,产品编号会附带包装尺寸/数量一起显示(例如:T1503-25G)。请确保 在“产品编号”字段中仅输入产品编号 (示例: T1503).
示例
其它示例:
705578-5MG-PW
PL860-CGA/SHF-1EA
MMYOMAG-74K-13
1000309185
输入内容 1.000309185)
遇到问题?欢迎随时联系我们技术服务 寻求帮助
如何查找COA批号
批号可以在产品标签上"批“ (Lot或Batch)字后面找到。
如果您查询到的批号为 TO09019TO 等,请输入去除前两位字母的批号:09019TO。
如果您查询到的批号含有填充代码(例如05427ES-021),请输入去除填充代码-021的批号:05427ES。
如果您查询到的批号含有填充代码(例如 STBB0728K9),请输入去除填充代码K9的批号:STBB0728。
部分情况下,可能未在线提供COA。如果搜索不到COA,可在线索取。
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
The E1% in water is typically 650-700 at a wavelength of 258 nm. Given a molecular weight (corrected for water content for the trihydrate) of 311.2, this corresponds to a molar extinction coefficient (EM) of between 20,200 and 21,800. So you might want to use an average value of 21,000 in your calculations.
Yes. A colorimetric method is described for the detection of homocysteine over structurally related thiols, cysteine and glutathione has been described in the literature. When colorless solutions of methyl viologen are heated with cysteine, homocysteine and glutathione, only the solution with homocysteine changes color. The rapid method requires a few minutes and produces color changes which can be observed visually or with UV-VIS spectrophotometers. The method may lead to a diagnostic method for detection of homocysteine. J. Am. Chem. Soc., 126, 3400 (2004).
This product typically assays at 15-18% water, corresponding to a trihydrate (X = 3). The molecular weight corrected for water content for the trihydrate is 311.2.
We have found that this compound (methyl viologen) is soluble in water at 50 mg/mL. According to the chemicals encyclopedia published by the Royal Society of Chemistry, 12th Ed., entry #7165, methyl viologen is very soluble in water, slightly soluble in the lower alcohols and insoluble in hydrocarbons; it is hydrolyzed by alkali and inactivated by inert clays and anionic surfactants.
Yes. The reference is Trudinger, P.A., Anal. Biochem., 36, 222-251, 1970. Here is the procedure:Reduced methyl viologen was prepared as follows: 20-30 μl of 0.1 M sodium dithionite in 0.1 M Tris, pH 8.0, was injected into 3 mL of nitrogen-flushed solutions of 0.1 mM methyl viologen. Removal of the oxygen, as much as possible, helps to inhibit the reoxidation of the reduced methyl viologen. In distilled water and neutral or acid buffers, reduction with sodium dithionite gave variable values in their determination of the extinctions of reduced methyl viologen. It appeared that alkaline pH's, i.e., ~8, may be preferable. Methyl Viologen (reduced) has been used as the substrate for nitrate reductase (cytochrome), Sigma product N0519. It is important that all reagents be virtually free of oxygen in order to prevent the oxidation of the reduced methyl viologen substrate or else no enzymatic reaction will occur. Towards this end all reagents are dissolved in deionized water which has been boiled for 10 minutes, then cooled. After cooling, the water is degassed under vacuum to further ensure the removal of oxygen. After reagents are prepared, they are stored in vials which are tightly capped, then stored on ice at 0-5 °C. It is best to have no more than a minimum volume of air in these containers.In our experience, for the reduction of methyl viologen using sodium dithionite, it is important to use anhydrous sodium dithionite, since the reducing power of the moist salt may be diminished.
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
According to the chemicals encyclopedia published by the Royal Society of Chemistry, methyl viologen dichloride hydrate is very soluble in water, slightly soluble in lower alcohols and insoluble in hydrocarbon solvents.
Unfortunately, we have not performed stability testing of methyl viologen dichloride hydrate in solution. Therefore, we would recommend you make a fresh solution before each use.
The water content of each lot of this product is tested by Karl Fischer titration. The weight percent of water will be reported on the certificate of analysis of each lot.
Ask a Scientist here.
LEPs enable a wide range of important applications including sensors, flexible LED displays and lighting devices, optical pump lasers, and potentially polymer diode lasers.
LEP支持广泛的重要应用,包括传感器、柔性 LED 显示和照明装置、光泵激光器和潜在的聚合物二极管激光器。
Graphene is the building block for carbon nanomaterials with different dimensionalities.
我们的科学家团队拥有各种研究领域经验,包括生命科学、材料科学、化学合成、色谱、分析及许多其他领域.
联系技术服务部门