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C8667

Colesterolo

Sigma Grade, ≥99%

1 of 1 reviewers received a sample product or took part in a promotion

Sinonimo/i:

3β-idrossi-5-colestene, 5-colestene-3β-olo

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Cambia visualizzazione
Voi/SKUDisponibilitàPrezzo
500 mg
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CHF 48.10
1 g
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CHF 67.50
5 g
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CHF 133.00
25 g
Per conoscere la disponibilità, visualizza il carrello
CHF 509.00
100 g
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CHF 1610.00

Informazioni su questo articolo

Formula empirica (notazione di Hill):
C27H46O
Numero CAS:
57-88-5
Peso molecolare:
386.65
NACRES:
NA.77
PubChem Substance ID:
24893094
eCl@ss:
39023139
UNSPSC Code:
12352111
EC Number:
200-353-2
MDL number:
MFCD00003646
Beilstein/REAXYS Number:
1915888

CHF 48.10

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biological source

sheep wool

Quality Segment

grade

Sigma Grade

assay

≥99%

form

powder

bp

360 °C (lit.)

mp

147-149 °C (lit.)

solubility

water: soluble 0.00003 g/L at 20 °C

density

1.067 g/mL at 25 °C (lit.)

application(s)

advanced drug delivery

shipped in

ambient

storage temp.

−20°C

SMILES string

CC(C)CCC[C@@H](C)[C@H]1CC[C@H]2[C@@H]3CC=C4C[C@@H](O)CC[C@]4(C)[C@H]3CC[C@]12C

InChI

1S/C27H46O/c1-18(2)7-6-8-19(3)23-11-12-24-22-10-9-20-17-21(28)13-15-26(20,4)25(22)14-16-27(23,24)5/h9,18-19,21-25,28H,6-8,10-17H2,1-5H3/t19-,21+,22+,23-,24+,25+,26+,27-/m1/s1

InChI key

HVYWMOMLDIMFJA-DPAQBDIFSA-N

Gene Information

Application

Il colesterolo è stato usato per preparare complessi immunostimolanti per potenziare le risposte cellulari e umorali. È stato incorporato nel mangime animale per studiare l′effetto della dieta ricca di colesterolo.
Standard per la cromatografia

Biochem/physiol Actions

Il colesterolo è un lipide che rappresenta fino a 20-25% circa dei componenti strutturali delle membrane cellulari. Determina la fluidità e la permeabilità della membrana, rendendola permeabile all′acqua ma non a ioni e protoni. Il colesterolo regola anche le funzioni dei trasportatori e delle proteine di segnale presenti sulla membrana citoplasmatica. Le principali sedi di sintesi del colesterolo sono l′intestino tenue e il fegato.
Componente principale di tutte le membrane biologiche; il colesterolo rappresenta il 25% circa dei lipidi cerebrali totali.

Preparation Note

In alcol riscaldato il colesterolo monoidrato produce una soluzione di limpida, da incolore a giallo chiaro. È anche solubile in acetone, diossano, etilacetato, benzene, etere di petrolio, oli, grassi e soluzioni acquose di sali biliari. Le soluzioni devono essere conservate al riparo dalla luce.

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1 of 1

Questo articolo
C85031131960C2155000
Colesterolo Sigma Grade, ≥99%

Sigma-Aldrich

C8667

Colesterolo

Colesterolo from sheep wool, ≥92.5% (GC), powder

Sigma-Aldrich

C8503

Colesterolo

Colesterolo United States Pharmacopeia (USP) Reference Standard

USP

1131960

Colesterolo

Colesterolo CRS, European Pharmacopoeia (EP) Reference Standard

C2155000

Colesterolo

description

Sigma Grade, ≥99%

description

from sheep wool, ≥92.5% (GC), powder

description

United States Pharmacopeia (USP) Reference Standard

description

CRS, European Pharmacopoeia (EP) Reference Standard

grade

Sigma Grade

grade

-

grade

pharmaceutical primary standard

grade

pharmaceutical primary standard

assay

≥99%

assay

≥92.5% (GC)

assay

-

assay

-

biological source

sheep wool

biological source

sheep wool

biological source

sheep

biological source

-

form

powder

form

powder

form

-

form

-

shipped in

ambient

shipped in

ambient

shipped in

-

shipped in

-

storage temp.

−20°C

storage temp.

room temp

storage temp.

−20°C

storage temp.

2-8°C

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Classe di stoccaggio

11 - Combustible Solids

Che succede?

WGK 1

Punto di infiammabilità (°F)

Not applicable

Punto di infiammabilità (°C)

Not applicable

DPI (dispositivi di protezione individuale)

Eyeshields, Gloves, type N95 (US)

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Certificati d'analisi (COA)

Lot/Batch Number

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Questions

1–7 of 7 Questions  

  1. Hello, I would like to know how to dissolve this product in serum, and what its maximum solubility in serum is? Because I am looking for a cholesterol product to prepare a solution with a concentration >250 mg/dL. Thank you!

    1 answer

    1. Free cholesterol is practically insoluble in serum. A true solution at a concentration of 250 mg/dL cannot be reliably achieved. Typical cholesterol levels in human serum may range from 150 – 250 mg/dL, with 30 – 70 mg/dL as free cholesterol. The majority is bound to lipoproteins in the serum matrix. Higher concentrations may be possible with heat, however this has not been investigated. The end user would have to determine the rate. Please see the link below to review a water-soluble cholesterol formulation, C4951. This product is a cyclodextrin complex that enhances cholesterol solubility up to 300 mg/mL (approximately 50 mg cholesterol).
      https://www.sigmaaldrich.com/product/sigma/c4951

      Please see the link below to review additional information regarding cholesterol transport in serum:
      https://www.sigmaaldrich.com/US/en/technical-documents/technical-article/research-and-disease-areas/metabolism-research/cholesterol-transport

      Helpful?

  2. how to prepare for cell culture? thank you

    1 answer

    1. Here is the link to our Biochemical Solubility table:
      https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/287/917/c3045inf.pdf
      For the Cell Culture Tested grade of this product, C3045, three options are provided: Serum, Tween and Ethanol.
      Note that if Serum is used as the solvent, it may already contain some Cholesterol. The "Tween" is referring to an aqueous solution of either TWEEN 20 or TWEEN 80. Also, Ethanol can be used to make a stock solution, before supplementing the culture medium; consider perhaps a 100X solution in ethanol, which would give a concentration of 1 percent ethanol in the medium.

      Helpful?

  3. What is the best temperature for storage for 5 mg/mL solutions in ethanol? Can they be stored at 4C? Thank you!

    1 answer

    1. The stability of this material in solution at 2-8°C has not been evaluated. Solutions prepared in Chloroform, in aliquots and protected from light, are stable for at least 1 year when stored at -20°C. Solutions prepared in Ethanol are expected to be similarly stable.

      Helpful?

  4. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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

      Helpful?

  5. Buongiorno, volevo chiedere cortesemente quale sia l'origine del prodotto

    1 answer

    1. This product is derived from sheep wool. The origin information of this product will be listed on the lot-specific Certificate of Origin. Please navigate to the ‘DOCUMENTATION’ section of the Product Detail Page to access a Certificate under the ‘Certificate of Origin’ tab:
      https://www.sigmaaldrich.com/product/sigma/c8667#product-documentation

      Helpful?

  6. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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

      Helpful?

  7. Hi, I want to know if this is from plant or sheep wool?

    1 answer

    1. As mentioned in the PROPERTIES section of the product page, this material is from sheep wool.

      Helpful?

1 Review This action will navigate to reviews.
1 of 1 reviewers received a sample product or took part in a promotion

Reviews

Active Filters

    • Review 1
    • Vote 1
    3 out of 5 stars.

    Cholesterol

    Used as standard for TLC, worked OK, stainned less than other lipids with iodine, but that may be be normal

    Helpful?

    1. Response from Merck KGaA:

      Thank you for taking the time to leave a review! We would like to learn more about your experience to see if there is anything we can do to help correct this issue. When you have a moment, please contact us by visiting https://www.sigmaaldrich.com/support/customer-support and submit a Product Technical Inquiry. We look forward to hearing from you soon!