potato
powder
amylopectin, essentially free
≤10% ethanol
≤2% butanol
white to off-white
0.05 M NaOH: 1 mg/mL, clear to slightly hazy, colorless
room temp
1S/C18H32O16/c19-1-4-7(22)8(23)12(27)17(31-4)34-15-6(3-21)32-18(13(28)10(15)25)33-14-5(2-20)30-16(29)11(26)9(14)24/h4-29H,1-3H2/t4-,5-,6-,7-,8+,9-,10-,11-,12-,13-,14-,15-,16+,17-,18-/m1/s1
FYGDTMLNYKFZSV-PXXRMHSHSA-N
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此商品 | A6237 | A7005 | A3176 |
---|---|---|---|
powder | lyophilized powder | ammonium sulfate suspension | powder |
amylopectin, essentially free, ≤10% ethanol, ≤2% butanol | - | - | - |
white to off-white | - | - | - |
0.05 M NaOH: 1 mg/mL, clear to slightly hazy, colorless | - | - | - |
room temp | −20°C | 2-8°C | 2-8°C |
Warning
Eye Irrit. 2
11 - Combustible Solids
WGK 3
Not applicable
Not applicable
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。
Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.
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)
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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.
This product is soluble in 50 mM NaOH at a concentration of 1 mg/mL. The product can also be dissolved as follows (final concentration = 1 mg/ml): Dissolve 100 mg in 1 mL ethanol. Add 10 mL water and 2 mL of 10% NaOH. Heat in boiling water bath until sample dissolves, cool to ambient temperature, then dilute to 100 mL with water.
Prepare iodine solution and Solution A: 1. Iodine solution: 0.2% iodine in 2% potassium iodide.2. Solution A: To 100 mg of sample in 100 mL flask, add 1 mL ethanol. Add 10 mL water and 2 mL of 10% NaOH. Warm in boiling water bath until sample dissolves. After cooling, dilute to 100 mL with water.Transfer 2.5 mL of solution A to 250 mL flask. To this flask, add 50 mL water, then 2 drops of 6 N hydrochloric acid, followed by 2.5 mL of Iodine solution. Dilute to 250 mL with water. Read absorbance at 680 nm against a blank.The final solution to be read will be at a sample concentration of 10 μg per mL, and 1% of the iodine solution.This procedure is based on McCready, R. M., and Hassid, W. Z., The Separation and Quantitative Estimation of Amylose and Amyolpectin in Potato Starch. J. Am. Chem. Soc., Vol. 65, pp. 1154-1157 (1943).
Sigma-Aldrich has not determined the molecular weight of the product. One reported range is from 40,000 to 340,000 Daltons, with chains containing 250 to 2000 anhydroglucose units. Source: WHO Food Additives Series No. 5.
The method of preparation is given in Street and Close, Clin. Chim. Acta, 1, 256-268 (1956). Potato starch is dissolved in boiling 2% (w/v) NaCl solution, filtered while hot, then cooled. Thymol is added, and the mixture is stirred for 48 hr. Amylopectin is decanted away in the supernatant. The precipitate is washed six times with concentrated thymol solution, four times with absolute ethanol, and dried.
The "Type" of the product has no significant meaning outside Sigma-Aldrich. The differences between products were designated by types before Sigma had established product numbers for specific products. The types were differentiated on several bases, including manufacturing method, source, and purity.
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.
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.
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