Saltar al contenido
Merck
Todas las fotos(5)

Documentos clave

Ver Toda la documentación

158127

Sigma-Aldrich

Paraformaldehyde

powder, 95%

Sinónimos:

Polyoxymethylene

Iniciar sesiónpara Ver la Fijación de precios por contrato y de la organización
Todas las fotos(5)

About This Item

Fórmula lineal:
HO(CH2O)nH
Número de CAS:
30525-89-4
Peso molecular:
30.03 (as monomer)
Número MDL:
MFCD00133991
Código UNSPSC:
12352100
ID de la sustancia en PubChem:
24849719
NACRES:
NA.21
En este momento no podemos mostrarle ni los precios ni la disponibilidad

densidad de vapor

1.03 (vs air)

Nivel de calidad

200

presión de vapor

<1.45 mmHg ( 25 °C)

Ensayo

95%

Formulario

powder

temp. de autoignición

572 °F

lim. expl.

73 %

mp

120-170 °C (lit.)

densidad

0.88 g/mL at 25 °C (lit.)

temp. de almacenamiento

2-8°C

cadena SMILES

[O-]#[C+H2]

InChI

1S/CH2O/c1-2/h1H2

Clave InChI

WSFSSNUMVMOOMR-UHFFFAOYSA-N

¿Está buscando productos similares? Visita Guía de comparación de productos

Descripción general

Paraformaldehyde is also referred as polyoxymethylene. It participates as an external CO source in the synthesis of aromatic aldehydes and esters.[1]

Otras notas

2024 CiteAb Award Winner for Supplier Succeeding in Parkinson′s Research

Palabra de señalización

Danger

Clasificaciones de peligro

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Carc. 1B - Eye Dam. 1 - Flam. Sol. 2 - Muta. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Órganos de actuación

Respiratory system

Código de clase de almacenamiento

4.1B - Flammable solid hazardous materials

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

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Elija entre una de las versiones más recientes:

Certificados de análisis (COA)

Lot/Batch Number
SDBB1446
STBL3498
SDBB0489
STBL1038
STBL0660

¿No ve la versión correcta?

Si necesita una versión concreta, puede buscar un certificado específico por el número de lote.

Busque por un COA

¿Ya tiene este producto?

Encuentre la documentación para los productos que ha comprado recientemente en la Biblioteca de documentos.

Visite la Librería de documentos

Los clientes también vieron

Slide 1 of 3

1 of 3

1,3,5-Trioxane &#8805;99%

Sigma-Aldrich

T81108

1,3,5-Trioxane

Dimethylamine hydrochloride 99%

Sigma-Aldrich

126365

Dimethylamine hydrochloride

Nunc&#174; Lab-Tek&#174; Chamber Slide&#8482; system 2 wells, Permanox&#174; slide, 4.2 cm2/well, sterile, 96/cs

C6682

Nunc® Lab-Tek® Chamber Slide™ system

Flow acetone-staining technique: A highly efficient procedure for the simultaneous analysis of DNA content, cell morphology, and immunophenotype by flow cytometry
Carbonari M, et al.
Cytometry. Part A : the Journal of the International Society For Analytical Cytology, 73(2), 168-174 (2008)
Morphological and physiological species-dependent characteristics of the rodent Grueneberg ganglion
Brechbuhl J, et al.
Frontiers in Neuroanatomy, 8, 87-87 (2014)
The effects of simvastatin on hippocampal caspase-3 and Bcl-2 expression following kainate-induced seizures in rats
Sun J, et al.
International Journal of Molecular Medicine, 30(4), 739-746 (2012)
In Situ Hybridization in Neurobiology, 27-27 (1994)
Cytometry, 256-256 (2000)
Ver todos los artículos relacionados

Protocolos

Protein Interactions

Formaldehyde cross-linking protocol detects specific protein interactions with confidence.

Protein Interactions

Formaldehyde cross-linking protocol detects specific protein interactions with confidence.

Protein Interactions

Formaldehyde cross-linking protocol detects specific protein interactions with confidence.

Protein Interactions

Formaldehyde cross-linking protocol detects specific protein interactions with confidence.

Questions

1–8 of 8 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. CAN USE TO FIX ZEBRAFISH TISSUE SAMPLES?

    1 answer

    1. Formalin solution (prepared using Paraformaldehyde) has been used to fix adult zebrafish tissue for histological applications.
      Citation: Comparative analysis of fixation and embedding techniques for optimized histological preparation of zebrafish by J.E. Cooper et al., Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 208, 38-46 (2018).
      https://www.sciencedirect.com/science/article/pii/S1532045617302089
      .
      There are likely many other citations in the literature for this application for Paraformaldehyde; the above article is a review article that compares several fixative solutions.

      Helpful?

  4. What is the difference between formaldehyde and paraformaldehyde?

    1 answer

    1. Paraformaldehyde is the polymeric form of formaldehyde. It is a solid. Formaldehyde is a gas which when dissolved in water gives a formaldehyde solution. Commercially available formaldehyde solutions usually contain 10-15% methanol, which prevents the formaldehyde from forming the polymeric paraformaldehyde.

      Helpful?

  5. Do you have a recommended method for preparing solutions of Paraformaldehyde, Product 158127?

    1 answer

    1. Paraformaldehyde does not dissolve but rather can be depolymerized in solution. Depolymerized solutions can be prepared in water with heating to 55-60°C. If necessary, further addition of 1-2 drops of a sodium hydroxide solution may be required. Some protocols suggest that paraformaldehyde should be prepared in buffered solutions such as phosphate buffer or PBS at approximately pH 7.

      Helpful?

  6. How does Product 158127, Paraformaldehyde, compare to prilled paraformaldehyde?

    1 answer

    1. Prilled has the appearance of small white beads.  Product 158127 is a powder, not prilled.

      Helpful?

  7. What is the Department of Transportation shipping information for this product?

    1 answer

    1. Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.

      Helpful?

  8. How stable are solutions of Product 158127, Paraformaldehyde?

    1 answer

    1. Buffered solutions of 2-4% formaldehyde may be used for up to two weeks if stored in brown bottles at 2-8°C.

      Helpful?

Reviews

No rating value

Active Filters

Nuestro equipo de científicos tiene experiencia en todas las áreas de investigación: Ciencias de la vida, Ciencia de los materiales, Síntesis química, Cromatografía, Analítica y muchas otras.

Póngase en contacto con el Servicio técnico