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
Agency
reag. ISO
质量水平
表单
solid
pH值（酸碱度）
6.0-7.5 (25 °C, 20 g/L in H2O)
溶解性
50 g/L
堆积密度
300 kg/m3
储存温度
no temp limit
SMILES字符串
O1[C@@H]([C@@H]([C@H]([C@@H]([C@H]1CO)O)O)O)O[C@@H]2[C@H](O[C@@H]([C@@H]([C@H]2O)O)O)CO
InChI
1S/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2/t3-,4-,5-,6+,7-,8-,9-,10-,11+,12-/m1/s1
InChI key
GUBGYTABKSRVRQ-ASMJPISFSA-N
相关类别
一般描述
淀粉通常由两种分子类型组成：直链淀粉和支链淀粉。淀粉和变性淀粉是重要的辅料。它们充当填充剂/粘合剂。
分析说明
外观（性状）：细粉末
pH值（2 %；水）：6.0 - 7.5
灵敏度：通过测试
还原性物质（以麦芽糖计）：最高为0.7
硫酸灰分：最高为0.4
干燥失重（105 °C，2 h）：最高为10
作为酶底物（对于淀粉酶）的适用性：通过测试
Iso试剂
储存分类代码
11 - Combustible Solids
WGK
WGK 1
闪点(°F)
Not applicable
闪点(°C)
Not applicable
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How can I determine the shelf life / expiration / retest date of this product?
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Helpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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What is the molecular weight and solubility of the product Starch 1.01252?
1 answer-
The molecular weight of this product is not determined. It is described as a soluble starch, meaning that it is soluble in hot water. Note that the description of being a soluble starch is based on the method of preparation for the product; there is no specification for solubility:
https://www.sigmaaldrich.com/specification-sheet/SPEC/MDA/CHEM/1.01252/1012520100The recommendation is to follow the method of preparing a 2 percent solution as found in the book Reagent Chemicals, published by the American Chemical Society:
Prepare a paste of 2.0 g of the sample with a little cold water and add to it with stirring 100 mL of boiling water. The solution should be no more than opalescent, and on cooling it should remain liquid and not increase in opalescence.Helpful?
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