![Poly[(R)-3-hydroxybutyric acid] natural origin](/deepweb/assets/sigmaaldrich/product/structures/129/476/7d1c924b-f644-4889-a2d6-d7a923ce382c/640/7d1c924b-f644-4889-a2d6-d7a923ce382c.png)
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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由来生物
plant
フォーム
powder
色
white to off-white
粘度
5-25 mPa.s, 0.3 % in H2O(25 °C)
溶解性
H2O: soluble 5 mg/mL (hot)
SMILES記法
[S](=O)(=O)([O-])O[C@H]1[C@H](O[C@H]([C@@H]([C@H]1O[C@H]4O[C@H]5[C@@H]([C@H](OC5)[C@H]4O)O[C@@H]6O[C@@H]([C@@H]([C@@H]([C@H]6O)O)O[S](=O)(=O)[O-])CO)O)O[C@@H]2[C@@H]3OC[C@H]2O[C@@H]([C@@H]3O)O)CO
InChI
1S/C24H38O25S2/c25-1-5-14(48-50(33,34)35)9(27)10(28)22(42-5)45-16-8-4-40-19(16)12(30)23(44-8)47-20-13(31)24(43-6(2-26)17(20)49-51(36,37)38)46-15-7-3-39-18(15)11(29)21(32)41-7/h5-32H,1-4H2,(H,33,34,35)(H,36,37,38)/p-2/t5-,6-,7-,8-,9-,10-,11-,12-,13-,14+,15+,16+,17+,18-,19-,20-,21+,22+,23-,24+/m1/s1
InChI Key
ZNOZWUKQPJXOIG-XSBHQQIPSA-L
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関連するカテゴリー
詳細
アプリケーション
保管分類コード
11 - Combustible Solids
WGK
WGK 2
引火点(°F)
Not applicable
引火点(℃)
Not applicable
適用法令
試験研究用途を考慮した関連法令を主に挙げております。化学物質以外については、一部の情報のみ提供しています。 製品を安全かつ合法的に使用することは、使用者の義務です。最新情報により修正される場合があります。WEBの反映には時間を要することがあるため、適宜SDSをご参照ください。
Jan Code
22048-25G-F:
22048-100G-F:
22048-VAR-F:
22048-BULK-F:
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 回答-
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How can I determine the shelf life / expiration / retest date of this product?
1 回答-
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役に立ちましたか？
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Is this powder free of proteases & nucleases?
1 回答-
Protease and nuclease testing are not conducted on this product, so their absence cannot be guaranteed.
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Does the carrageenan automatically form a gel after dissolution in hot water ? What happens when the solution cools down ?
1 回答-
This product has not undergone testing to confirm gel formation after dissolution in hot water, nor has a specific rheological study been conducted under these conditions. It is understood that κ- and ι-carrageenans self-associate into helical structures that can form either rigid or flexible gels in ionic solutions containing potassium and calcium ions. It is anticipated that an aqueous solution can be prepared in hot water, with the addition of salt, leading to gel formation as the solution cools, as noted in Fateha et al. 2021 IOP Conf. Ser.: Earth Environ. Sci. 715 012055.
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What is the average molecular weight for this k-carrageenan?
1 回答-
Unfortunately, the molecular weight is not determined for this product.
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Is this k-carrageenan food grade?
1 回答-
No. This product is intended for research use only. Currently, a food grade κ-Carrageenan product is not available.
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Hi, I'm interested to know how the K-carrageenan is synthesized. Do you use more green production methods such as enzyme assisted extraction, or the more traditional method? Thanks, Rowan
1 回答-
This K-carrageenan product comes from a family of sulphated polysaccharides extracted from certain species of red seaweed. Carrageenan is a cell wall hydrocolloid found in certain species of seaweeds belonging to red algae (class: Rhodophyceae). Carrageenan is extracted with water under neutral or alkaline conditions at elevated temperatures. The exact method of preparation is considered proprietary.
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Can we use this type of carrageenan for inflammatory induction?
1 回答-
Carrageenans are commonly used for inflammation induction. This product (22048) is the kappa isoform. The iota and lambda form are also available - see C1138, 22049, and C1013 for additional options. These products are not tested for use as an inflammation induction agent. The end-user would be responsible for determining suitability.
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