计算溶液所需的质量、体积或浓度。
为什么选择此级别
，适用于对基线干扰要求严格的色谱和分析工作流程。
储存与运输
室温,干燥。常规运输 。请查阅批次 COA 获取详细规格。
质量文档
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
文献证明
在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
概述
4A分子筛的孔径约4埃，其主要适用于气体，液体的干燥。可吸附H2O、NH3、H2S、CO2、SO2、CO、氯甲烷、溴甲烷、乙炔、乙烷、乙烯、丙烯等。广泛用于油田伴生气、天然气等的干燥。也广泛用于乙醇的脱水。也用于真空玻璃等的防结露。用作色谱试剂。选择性吸附剂。催化剂或催化剂载体。用于甲烷、乙烷和丙烷的分离。练焦气中乙烯的分离。 也用作干燥剂。空气，天然气，烷烃，致冷剂等气体和液体的深度干燥；氩气的制取和净化；电子元件和易受潮变质物质的静态干燥；油漆，聚脂类，染料，涂料中作脱水剂
Choosing a Molecular Sieve: 1. The preferential adsorption of one molecule over another depends upon pore diameter and mesh size. 2. The dynamic capacity of the silica gel for adsorbing a particular compound is governed by the internal surface area; the greater the surface area, the greater the dynamic capacity. 3. Rate of adsorption and sharpness of resolution are dependent chiefly on particle size and column packing; a fine particle size gives optimum sharpness of resolution. 4. Liquids are most readily adsorbed from solvents in which they are least soluble; a good solvent makes a good desorbing agent. 5. Highly polar liquids are readily adsorbed. Compounds having hydroxyl groups, or containing oxygen are strongly adsorbed. 6. For similar compounds, the higher the molecular weight the higher the selectivity. 7. For hydrocarbons of similar molecular weight, adsorptivity increases with the number of double bonds. Molecular sieves are crystalline metal aluminosilicates having a three-dimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size. This 4A form with sodium ions has the effective pore opening of 4?, thus excluding molecules of effective diameter >4? (for example: propane). The 8 to 12-mesh type is common in liquid-phase applications. Molecular sieves are considered a universal drying agent in polar and nonpolar media.
规格
别名
4A分子筛
英文别名
4A
规格或纯度
beads,8-12 mesh
英文名称
Molecular sieves, 4 Å
储存条件
室温,干燥
运输条件
常规运输
名称和识别符
分子类型
未知
技术文档
高级数据
化学和物理性质
敏感性
对空气敏感，对湿度敏感
安全和危险性（GHS）
象形图
信号词
警告
危险声明
H315: 引起皮肤刺激
H319: 引起严重眼睛刺激
H335: 可能引起呼吸道刺激
预防措施声明
P261: 避免吸入灰尘/烟雾/气体/雾/蒸汽/喷雾
P305+P351+P338: 如进入眼睛：用水小心冲洗几分钟。如戴隐形眼镜并可方便地取出，取出隐形眼镜。继续冲洗。
质检证书（CoA,COO,BSE/TSE 和分析图谱)
C of A & Other Certificates(BSE/TSE, COO):
输入批号以搜索分析图谱:
通过匹配包装上的批号来查找并下载产品的 COA，每批产品都进行了严格的验证，您可放心使用！
| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
 I2618836 |
分析证书 | M103749 |
| I2618835 |
分析证书 | M103749 |
| I2618834 |
分析证书 | M103749 |
| A2608412 |
分析证书 | M103749 |
| A2608413 |
分析证书 | M103749 |
| A2608414 |
分析证书 | M103749 |
| G2601100 |
分析证书 | M103749 |
| A2510417 |
分析证书 | M103749 |
| L2505002 |
分析证书 | M103749 |
| A2510416 |
分析证书 | M103749 |
| A2510418 |
分析证书 | M103749 |
| A2510419 |
分析证书 | M103749 |
| B2423098 |
分析证书 | M103749 |
| J2416206 |
分析证书 | M103749 |
| B2423099 |
分析证书 | M103749 |
| G2517033 |
分析证书 | M103749 |
| G2405014 |
分析证书 | M103749 |
| E2422103 |
分析证书 | M103749 |
| B2423103 |
分析证书 | M103749 |
| B2423102 |
分析证书 | M103749 |
| B2423101 |
分析证书 | M103749 |
| B2423100 |
分析证书 | M103749 |
| G2311049 |
分析证书 | M103749 |
| J2228704 |
分析证书 | M103749 |
| J2228724 |
分析证书 | M103749 |
| J2418282 |
分析证书 | M103749 |
| H2203028 |
分析证书 | M103749 |
| B2225477 |
分析证书 | M103749 |
技术文档和文章
溶液计算器
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