The product does not have a quality specification for pH and, consequently, is not tested.
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描述
non-ionic
表单
viscous liquid
分子量
~1228
组成
lauric acid, ≥40% (balance primarily myristic, palmoyic, and stearic acids)
浓度
≥40.0%
技术
cell culture | mammalian: suitable
折射率
n20/D 1.468 (lit.)
CMC
0.06 mM (20-25°C)
转变温度
cloud point 76 °C
溶解性
water: soluble
密度
1.095 g/mL at 25 °C (lit.)
1.1 g/cm3 at 25 °C (lit.)
HLB
16.7
SMILES字符串
CCCCCCCCCCCC(=O)OCCOCC(C1C(C(CO1)OCCO)OCCO)OCCO
InChI
1S/C26H50O10/c1-2-3-4-5-6-7-8-9-10-11-24(30)34-19-18-31-20-22(32-15-12-27)26-25(35-17-14-29)23(21-36-26)33-16-13-28/h22-23,25-29H,2-21H2,1H3
InChI key
HMFKFHLTUCJZJO-UHFFFAOYSA-N
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一般描述
吐温20是聚氧乙烯山梨醇酯，属于聚山梨醇家族。这是一种分子量为1225道尔顿的非离子洗涤剂，认为其含20个环氧乙烷单位、1个山梨醇和1个月桂酸为主要脂肪酸。环氧乙烷亚基提供了表面活性剂的亲水性，而碳氢化合物链提供疏水环境。山梨醇形成连接环氧乙烷聚合物的骨架环。[1]
应用
吐温20是一种广泛应用于生化领域的非离子去污剂。它被用作稳定的水包油乳液的乳化剂。吐温20已可用于膜的预提取，以去除周围蛋白(用于提取膜结合蛋白的比例为2%)。
吐温20在基于膜的免疫分析中已被用作一种封闭剂，其常用浓度为0.05%。吐温20可用于裂解哺乳动物细胞，使用浓度为0.005至0.5%。
吐温20在基于膜的免疫分析中已被用作一种封闭剂，其常用浓度为0.05%。吐温20可用于裂解哺乳动物细胞，使用浓度为0.005至0.5%。
非离子洗涤剂
注意
吐温20在高压灭菌下可能不稳定，特别是在含金属阳离子的缓冲溶液中。如果没有对性能的变化进行测试，则不建议使用高压灭菌。吐温20对热敏感，放置于升高的温度中其颜色会变深。据报道，聚山梨醇酯与碱、重金属盐、酚和单宁酸不相容。它们可能会降低许多防腐剂的活性。聚山梨醇酯水溶液在贮存过程中发生自氧化反应，光、温度升高和硫酸铜催化其变化。
制备说明
吐温20可混溶于水（100mg/mL），得到透明的黄色溶液。它也可以与酒精，二恶烷，乙酸乙酯混溶。吐温20不溶于液体石蜡和固定油脂。
法律信息
TWEEN is a registered trademark of Croda International PLC
储存分类代码
10 - Combustible liquids
WGK
WGK 1
闪点(°F)
527.0 °F - Pensky-Martens closed cup
闪点(°C)
275 °C - Pensky-Martens closed cup
个人防护装备
Eyeshields, Gloves
其他客户在看
Enoch Ming Wei Ng et al.
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A method to measure the contact angle, which is indicative of wetting, using small liquid volumes dispensed directly on microplate wells is described and demonstrated. Experiments with enhanced green protein samples of volumes 4.4-6 μl showed no measured variance in
Conformations of a metastable SH3 domain characterized by smFRET and an excluded-volume polymer model.
Mazouchi A, et al.
Biophysical Journal, 110(7), 1510-1522 (2016)
Adverse morphological development in embryonic zebrafish exposed to environmental concentrations of contaminants individually and in mixture.
Kinch CD, et al.
Aquatic Toxicology (Amsterdam, Netherlands), 175, 286-298 (2016)
Cassandra D Kinch et al.
Aquatic toxicology (Amsterdam, Netherlands), 175, 286-298 (2016-04-24)
Exposure to environmental contaminants has been linked to developmental and reproductive abnormalities leading to infertility, spontaneous abortion, reduced number of offspring, and metabolic disorders. In addition, there is evidence linking environmental contaminants and endocrine disruption to abnormal developmental rate, defects
Jeffrey Wimsatt et al.
BMC cancer, 16(1), 942-942 (2016-12-09)
Colorectal cancer is the second most common cause of cancer deaths for both men and women, and the third most common cause of cancer in the U.S. Toxicity of current chemotherapeutic agents for colorectal cancer, and emergence of drug resistance
商品
可生成组织和干细胞来源3D脑、胃肠道、肺和癌症肿瘤类器官模型的类器官培养产品。
Organoid culture products to generate tissue and stem cell derived 3D brain, intestinal, gut, lung and cancer tumor organoid models.
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Have you ever tested the pH of TWEEN 20?
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How can I determine the shelf life / expiration / retest date of this product?
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If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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