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/418/501/product-dating-information-06-25-mk.pdf
M0262
Methyl cellulose
27.5-31.5% (Methoxyl content), viscosity: 400 cP
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A propos de cet article
Quality Segment
assay
27.5-31.5% (Methoxyl content)
form
powder
color
white to off-white
viscosity
300-560 cP, 2 % in water(20 °C)
SMILES string
[*]OC[C@H]1O[C@@H](O[C@@H]2[C@@H](CO[*])O[C@@H](O[*])[C@H](O[*])[C@H]2O[*])[C@H](O[*])[C@@H](O[*])[C@@H]1O[*]
InChI key
YLGXILFCIXHCMC-JHGZEJCSSA-N
General description
Application
- in total gastrointestinal transit
- in in vitro motility assay[1]
- in the measurement of gastric emptying by phenol red method
Other Notes
1 of 1
Cet article | |||
|---|---|---|---|
| assay 27.5-31.5% (Methoxyl content) | assay 26.0-33.0% (methoxyl group, on Dry Basis) | assay - | assay - |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 200 |
| form powder | form powder | form powder | form powder |
| color white to off-white | color - | color - | color white to off-white |
| viscosity 300-560 cP, 2 % in water(20 °C) | viscosity 320-480 cP, 2 % in water(20 °C) | viscosity 3000-5500 mPa.s, 2 % in H2O(20 °C) | viscosity 1,200-1,800 cP, 2 % in water(20 °C) |
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Classe de stockage
11 - Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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How can I determine the shelf life / expiration / retest date of this product?
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We would like to know if this methylcellulose is derived from bacteria or from plants? And if it's possible, is it known the size of the pores of metlhylcellulose hydrogels, produced with this specific methylcellulose?
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Source origin details can vary from lot to lot. Cellulosic material tends to be derived from wood pulp. Hydrogel pore size can vary depending on the conditions used. Please consult scientific literature for specific guidance.
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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How do I make up 25cP, 50cP, 100cP viscosity solutions with the M0262 methyl cellulose?
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The viscosity of this product can reach 300-560 cP when forming a 2% solution in water at 20 °C. To prepare 25 cP, 50 cP, and 100 cP viscosity solutions, the 2% solution must be further diluted. In general, the viscosity of a solution will decrease with dilution, but the relationship is not always strictly proportional. Therefore, it is essential to use a viscometer to accurately measure the viscosity after each dilution step to achieve the desired viscosity levels.
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What is the Molecular weight of this product approx.?
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The molecular weight is approximately 41kDa.
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