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Sigma-Aldrich

Poloxamer 188

Synonym(s):

Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol), Lutrol F68

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About This Item

CAS Number:
9003-11-6
MDL number:
MFCD00082049
UNSPSC Code:
12352104
NACRES:
NA.25
Pricing and availability is not currently available.

form

solid

Quality Level

200

mol wt

~7680-9510 g/mol

composition

oxyethylene, 79.9-83.7%

impurities

≤0.25% ethylene glycol and diethylene glycol
≤0.4% total ash
≤1 ppm ethylene oxide
≤1.0% water
≤2 ppm arsenic traces
≤20 ppm heavy metals
≤5 ppm dioxan
≤5 ppm propylene oxide
50-150 ppm butylhydroxytoluene

ign. residue

≤0.30%

color

APHA: ≤120, 50/50 in CH3OH

pH

5.0-7.5 (100 g/L in H2O)
6.0-7.5 (25 g/L in H2O)

CMC

0.48 mM

transition temp

cloud point >100 °C

HLB

>24

SMILES string

O2C(C2)C.O1CC1

InChI

1S/C3H6O.C2H4O/c1-3-2-4-3;1-2-3-1/h3H,2H2,1H3;1-2H2

InChI key

RVGRUAULSDPKGF-UHFFFAOYSA-N

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Application


  • Stabilizing Function of P 188 in Dermal Formulations: Examined for its stabilizing effects on industrial concentrates of dermal hesperidin smartCrystals, P 188 contributed to enhancing the long-term stability of the formulations, relevant for dermal therapeutic interventions (Romero et al., 2015).

Biochem/physiol Actions

Poloxamer 188 is widely used as a thickening agent and gel binder.

Other Notes

The Poloxamer 188 grades are poloxamers from the extensive line of block copolymers.

Legal Information

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

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Certificates of Analysis (COA)

Lot/Batch Number
BCCL8783
BCCM5491
BCCL3457
BCCK4825
BCCJ5911

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Jianan Shen et al.
Biomaterials, 34(5), 1581-1590 (2012-11-14)
The metastasis of breast cancer is the leading cause of cancer death in women, and the lung is a common location of a secondary tumor that has metastasized from the primary source tumor. In this work, an attempt to simultaneously
Irshad A Wani et al.
Colloids and surfaces. B, Biointerfaces, 101, 243-250 (2012-09-27)
Silver nanoparticles have been synthesized in the inverse microemulsions formed using three different surfactants viz., cetyl-trimethyl ammonium bromide (CTAB), Tergitol and Triton X-100. We have done a systematic study of the effect of the surfactants on the particle size and
Wendell J Lu et al.
Lipids, 47(6), 571-580 (2012-02-03)
Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) are incretins produced in the intestine that play a central role in glucose metabolism and insulin secretion. Circulating concentrations of GLP-1 and GIP are low and can be difficult to assay in
D J Bartley et al.
Veterinary parasitology, 187(3-4), 464-472 (2012-03-21)
Non-specific mechanisms involving ATP-binding cassette drug efflux transporters may play an important role in xenobiotic clearance in ovine gastro-intestinal nematodes. By using transporter inhibitors, the aim of this trial was to assess the possibility of increasing drug bioavailability in the
Wanhua Feng et al.
Colloids and surfaces. B, Biointerfaces, 105, 43-50 (2013-01-29)
The interaction between bacteria and surfaces is central to many environmental, industrial and medical applications. Surfactants are commonly used in these applications and can potentially influence the bacterium/surface interaction. The effect of surfactants upon bacterial cell surface thermodynamic properties was
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Questions

1–2 of 2 Questions  

  1. 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

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  2. 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/449/386/product-dating-information-mk.pdf

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