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Sigma-Aldrich

3,6-Dimethyl-1,4-dioxane-2,5-dione

99%

Sinónimos:

DL-Lactide, rac-Lactide, Lactide

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About This Item

Fórmula empírica (notación de Hill):
C6H8O4
Número de CAS:
95-96-5
Peso molecular:
144.13
Número CE:
202-468-3
Número MDL:
MFCD00011685
Código UNSPSC:
12352100
ID de la sustancia en PubChem:
24858300
NACRES:
NA.22
En este momento no podemos mostrarle ni los precios ni la disponibilidad

Nivel de calidad

200

Ensayo

99%

Formulario

crystals

bp

142 °C/8 mmHg (lit.)

mp

116-119 °C

grupo funcional

ester

temp. de almacenamiento

2-8°C

cadena SMILES

CC1OC(=O)C(C)OC1=O

InChI

1S/C6H8O4/c1-3-5(7)10-4(2)6(8)9-3/h3-4H,1-2H3

Clave InChI

JJTUDXZGHPGLLC-UHFFFAOYSA-N

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Descripción general

3,6-Dimethyl-1,4-dioxane-2,5-dione (or rac-lactide), is the 50:50 racemic mixture of D- and L-Lactide. Rac-lactide is a lactone derived from lactic acid that has attracted great interest in academia and commercial applications, as it is derived from abundant renewable resources. Rac-lactide can be ready polymerized via ring-opening polymerization, using a variety of metal or organocatalysts, yielding poly(D,L-lactide). While the resulting polymer is generally amorphous, the use of stereospecific catalysts can lead to heterotactic PLA, which exhibits some degree of crystallinity.

Aplicación

3,6-Dimethyl-1,4-dioxane-2,5-dione can be used as a reactant:
  • To synthesize multi-block copolymers of polylactide and polycarbonate.
  • In the aluminum-catalyzed polymerization of propene oxide, lactide, and phthalic anhydride to produce multi-block polyesters.

Pictogramas

Exclamation mark
GHS07

Palabra de señalización

Warning

Frases de peligro

H319

Clasificaciones de peligro

Eye Irrit. 2

Código de clase de almacenamiento

11 - Combustible Solids

Clase de riesgo para el agua (WGK)

WGK 2

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable

Equipo de protección personal

dust mask type N95 (US), Eyeshields, Gloves

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Certificados de análisis (COA)

Lot/Batch Number
BCCL8455
BCCM5564
BCCL9376
BCCL7050
BCCM1656

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A family of racemic and enantiopure indium complexes 1-11 bearing bulky chiral diaminoaryloxy ligands, H(NNO(R)), were synthesized and fully characterized. Investigation of both the mono- and the bis-alkoxy-bridged complexes [(NNO(R))InX](2)[μ-Y][μ-OEt] (5, R = (t)Bu, X = Y = Cl; 8
Kimberly M Osten et al.
Dalton transactions (Cambridge, England : 2003), 41(26), 8123-8134 (2012-04-07)
Functionalized diaminophenols, H(N(R1R2)N(R3)O), were investigated as ligands for indium catalysts in the ring-opening polymerization of racemic lactide. Precursor complexes (N(Me2)N(Me)O)InCl(2) (1), (N(Pr2)NO)InCl(2) (2), and (N(Mes)NO)InCl(2) (3) were synthesized and fully characterized by (1)H and (13)C NMR spectroscopy, elemental analysis, and
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Questions

1–3 of 3 Questions  

  1. 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

      Helpful?

  2. 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?

  3. I have purchased the lactide, and its a mixture of L and D right? also, if I want to purchase L-lactide how much is it? because I couldn't find it.

    1 answer

    1. This product, 3,6-Dimethyl-1,4-dioxane-2,5-dione (or rac-lactide), is the 50:50 racemic mixture of D- and L-Lactide.

      L-lactide is available on the website under the product number "36704".
      For more information, please visit https://www.sigmaaldrich.com/US/en/product/aldrich/367044

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