There is no information on the polydispersity index of this polymer.
180955
Cellulose acetate
average Mn ~30,000 by GPC
Sinonim:
Acetylcellulose
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Biarkan Kami Membantuform
powder
Quality Level
mol wt
average Mn ~30,000 by GPC
extent of labeling
39.8 wt. % acetyl
impurities
≤3.0% water
refractive index
n20/D 1.475 (lit.)
density
1.3 g/mL at 25 °C (lit.)
SMILES string
O1[C@H](C(C(C(C1COC(=O)C)OC(=O)C)OC(=O)C)OC(=O)C)O[C@@H]2C(OC(C(C2OC(=O)C)OC(=O)C)OC(=O)C)COC(=O)C
InChI
1S/C28H38O19/c1-11(29)37-9-19-21(39-13(3)31)23(40-14(4)32)26(43-17(7)35)28(46-19)47-22-20(10-38-12(2)30)45-27(44-18(8)36)25(42-16(6)34)24(22)41-15(5)33/h19-28H,9-10H2,1-8H3/t19?,20?,21?,22-,23?,24?,25?,26?,27?,28+/m1/s1
InChI key
WOTQVEKSRLZRSX-OLIDUAMRSA-N
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Item ini | 419028 | Y0000784 | 1098300 |
|---|---|---|---|
| refractive index n20/D 1.475 (lit.) | refractive index n20/D 1.475 (lit.) | refractive index n20/D 1.475 (lit.) | refractive index n20/D 1.475 (lit.) |
| form powder | form powder | form - | form - |
| density 1.3 g/mL at 25 °C (lit.) | density 1.3 g/mL at 25 °C (lit.) | density 1.3 g/mL at 25 °C (lit.) | density 1.3 g/mL at 25 °C (lit.) |
| mol wt average Mn ~30,000 by GPC | mol wt average Mn ~50,000 by GPC | mol wt - | mol wt - |
| extent of labeling 39.8 wt. % acetyl | extent of labeling 39.7 wt. % acetyl | extent of labeling - | extent of labeling - |
| impurities ≤3.0% water | impurities ≤3.0% water | impurities - | impurities - |
General description
Cellulose is a naturally occurring biodegradable and biocompatible polymer. Cellulose based polymers find wide variety of applications as base matrix in biopharmaceutical industry. Cellulose acetate is soluble in acetone. Cellulose acetate can be easily electrospun into its nanofibers.[1]
Application
Cellulose acetate was used in the fabrication of gold microelectrode for electrochemical monochloramine measurement.[2] Cellulose acetate based membranes are used in the separations in aqueous systems and in reverse osmosis process.[3] It has been reported to be used to desalinate seawater.[4]Cellulose acetate was used for biosensor encapsulation.[5] It was used in the preparation of cellulose acetate nanofibre felt structure,[6] cellulose acetate fibers.[7]
Kelas Penyimpanan
11 - Combustible Solids
wgk_germany
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Temukan dokumentasi untuk produk yang baru saja Anda beli di Perpustakaan Dokumen.
Cellulose acetate reverse osmosis membranes: optimization of the composition
Duarte AP, et al.
Journal of Applied Polymer Science, 100(5), 4052-4058 (2006)
Fabrication and bioseparation studies of adsorptive membranes/felts made from electrospun cellulose acetate nanofibers
Zhang L, et al.
Journal of Membrane Science , 319(1), 176-184 (2008)
Solvent control of cellulose acetate nanofibre felt structure produced by electrospinning
Haas D, et al.
J. Mater. Sci., 45(5), 1299-1306 (2010)
Cellulose acetate reverse osmosis membranes: optimization of preparation parameters
Duarte AP, et al.
Journal of Applied Polymer Science, 103(1), 134-139 (2007)
Monochloramine-sensitive amperometric microelectrode: optimization of gold, platinum, and carbon fiber sensing materials for removal of dissolved oxygen interference
Lee WH, et al.
Ionics, 1-12 (2015)
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Is there any data on polydispersity index, polymerization, etc?
1 answer-
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What is the viscosity (in poise) of cellulose acetate with an average molecular weight of ~30,000?"
1 answer-
This product is not formally assayed to determine viscosity. No specific information is available regarding this property.
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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.pdfHelpful?
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What is the degree of substitution of this product? In other words, what is the percentage (by number) of hydroxyl groups substituted by acetyl groups?
1 answer-
The specification sheet for this product shows that the percent acetyl by weight is between 39.3 percent and 40.3 percent. That narrow range corresponds to exactly three acetyl groups and three free hydroxyls for the six available hydroxyl groups per disaccharide unit of the cellulose acetate.
https://www.sigmaaldrich.com/specification-sheets/308/124/180955-BULK_______ALDRICH__.pdfHelpful?
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Hi, what is the particle size?
1 answer-
The particle size of this product is not determined.
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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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