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420840

Sigma-Aldrich

LUDOX ® AS-40 胶态二氧化硅

40 wt. % suspension in H2O

别名:

二氧化硅 制备

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1 L
$89.00
4 L
$231.00
18 L
$618.00

$89.00

国内现货，预计发货时间2025年4月15日详情

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1 L
$89.00
4 L
$231.00
18 L
$618.00

About This Item

线性分子式:
SiO2
CAS号:
7631-86-9
分子量:
60.08
MDL编号:
MFCD00011232
UNSPSC代码:
12352309
PubChem化学物质编号:
24866356
NACRES:
NA.22

$89.00

国内现货，预计发货时间2025年4月15日详情

获取大包装报价

描述

colloidal

表单

liquid

浓度

40 wt. % suspension in H2O

表面积

~135 m2/g

pH值（酸碱度）

9.1

密度

1.295 g/mL at 25 °C

SMILES字符串

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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一般描述

LUDOX®  AS-40胶体二氧化硅可用作沸石的二氧化硅源。[1]

应用

Ludox AS-40用于：
  • 作为Nafion纳米复合膜中的过滤材料[2]
  • 作为前体合成微-介孔碳球[3]

法律信息

LUDOX is a registered trademark of W.R. Grace & Co.-Conn.

储存分类代码

12 - Non Combustible Liquids

WGK

nwg

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
MKCX1362
MKCV5026
MKCV6403
MKCW0106
MKCT4415

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Questions

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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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.pdf

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