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重要文件

P6148

Sigma-Aldrich

多聚甲醛

reagent grade, crystalline

同義詞:

聚氧亚甲基

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About This Item

線性公式:
HO(CH2O)nH
CAS號碼:
分子量::
30.03 (as monomer)
MDL號碼:
分類程式碼代碼:
12352114
PubChem物質ID:
NACRES:
NA.25
等級:
reagent grade
蒸汽壓力:
<1.45 mmHg ( 25 °C)
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等級

reagent grade

品質等級

蒸汽密度

1.03 (vs air)

蒸汽壓力

<1.45 mmHg ( 25 °C)

形狀

crystalline

自燃溫度

572 °F

expl. lim.

73 %

mp

120-170 °C (lit.)

密度

0.88 g/mL at 25 °C (lit.)

儲存溫度

2-8°C

SMILES 字串

[O-]#[C+H2]

InChI

1S/CH2O/c1-2/h1H2

InChI 密鑰

WSFSSNUMVMOOMR-UHFFFAOYSA-N

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相關類別

一般說明

多聚甲醛是一种交联固定剂。可通过加热和加入少量氢氧化钠将其变为甲醛。[1][2]

應用

当样品用于荧光研究时,建议将多聚甲醛用于制备组织或细胞的福尔马林固定剂。
多聚甲醛已在染色过程中用于固定细胞和组织切片。[3][4][5]

相關產品

產品號碼
描述
訂價

訊號詞

Danger

危險分類

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

標靶器官

Respiratory system

儲存類別代碼

4.1B - Flammable solid hazardous materials

水污染物質分類(WGK)

WGK 2

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

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


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分析證明 (COA)

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Farcas MA et al.
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Fang TC, et al.
Journal of the American Society of Nephrology, 16, 1723-1723 (2005)
Ying Wang et al.
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Burry RW
Immunocytochemistry: A Practical Guide for Biomedical Research (2009)

文章

可用的螢光原位雜交 (FISH) 程序、試劑和設備。

Available Fluorescent in situ hybridization (FISH) procedures, reagents and equipment.

條款

細胞染色可分為四個步驟:細胞製備、固定、施用抗體及評估。

Cell staining can be divided into four steps: cell preparation, fixation, application of antibody, and evaluation.

相關內容

In Situ Hybridization of Whole-Mount Mouse Embryos with RNA Probes: Hybridization, Washes, and Histochemistry. This is a protocol describing how to perform in situ hybridization on whole mouse embryos. Here we describe the hybridization procedure, and the localization of the DIG-labeled RNA using a conjugate of anti-DIG Fab antibody and calf intestinal alkaline phosphatase. Enzyme activity of the reporter is detected by a color reaction, resulting in the formation of a water-insoluble purple/blue precipitate. Manipulating the Mouse Embryo - Third Edition

Three-dimensional (3D) printing of biological tissue is rapidly becoming an integral part of tissue engineering.

生物組織的三維 (3D) 列印正迅速成為組織工程不可或缺的一部分。

Questions

1–8 of 8 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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  3. 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.

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  4. How to prepare solutions of Product P6148, Paraformaldehyde?

    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.

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  5. 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.

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  6. How stable are Product P6148, Paraformaldehyde, solutions?

    1 answer
    1. Buffered solutions of 2-4% can be stored protected from light for 2-3 weeks at 2-8°C.

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  7. What is the shelf life of Product P6148, Paraformaldehyde?

    1 answer
    1. The shelf life has not been assigned but guarantee of quality is 1 year from the time of receipt for unopened bottles stored at 2-8 °C.  We expect the product to be of good quality for at least 2 years.

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  8. What is the difference between formaldehyde and paraformaldehyde?

    1 answer
    1. Paraformaldehyde is the polymeric form of formaldehyde. Paraformaldehyde is a solid, and formaldehyde is a gas. Formaldehyde solutions consist of formaldehyde gas dissolved in a solvent of some kind.

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