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16005

Sigma-Aldrich

Paraformaldehyde

meets analytical specification of DAC, 95.0-100.5%

Sinonimo/i:

Polyoxymethylene

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CHF 66.60
25 KG
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CHF 332.00

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1 KG
CHF 66.60
25 KG
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6 X 1 KG
CHF 332.00

About This Item

Formula condensata:
HO(CH2O)nH
Numero CAS:
30525-89-4
Peso molecolare:
30.03 (as monomer)
Numero MDL:
MFCD00133991
Codice UNSPSC:
12352100
ID PubChem:
24849849
NACRES:
NA.22

CHF 66.60

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Densità del vapore

1.03 (vs air)

Livello qualitativo

200

Tensione di vapore

<1.45 mmHg ( 25 °C)

Saggio

95.0-100.5%

Stato

pellets

Temp. autoaccensione

572 °F

Qualità

meets analytical specification of DAC

Limite di esplosione

73 %

tecniche

NMR: suitable

Impurezze

residual solvents, in accordance
<0.1% sulfated ash
10 ppm heavy metals (as Pb)

Punto di fusione

120-170 °C (lit.)

Solubilità

water: insoluble

Densità

0.88 g/mL at 25 °C (lit.)

Compatibilità

in accordance for appearance of solution
suitable for acidity or alkalinity (complying)

Temperatura di conservazione

2-8°C

Stringa SMILE

[O-]#[C+H2]

InChI

1S/CH2O/c1-2/h1H2
WSFSSNUMVMOOMR-UHFFFAOYSA-N

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Descrizione generale

Buffered picric acid-paraformaldehyde fixative is suitable for use in electron microscopy and light-microscopic immunocytochemistry.[1]

Applicazioni

Paraformaldehyde was used in the preparation of azomethine ylide, required for the synthesis of amine-modifying single-walled carbon nanotubes.[2] It was also used in the preparation of α-methylenechromanes, α-methylenequinoline and ortho-quinone methides.[3]

Avvertenze

Danger

Classi di pericolo

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

Organi bersaglio

Respiratory system

Codice della classe di stoccaggio

4.1B - Flammable solid hazardous materials

Classe di pericolosità dell'acqua (WGK)

WGK 2

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

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

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Certificati d'analisi (COA)

Lot/Batch Number
SDBB2181
STBL3782
STBL4527
STBL2820
STBL1058

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Formaldeide for molecular biology, 36.5-38% in H2O

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Formaldeide

Formaldeide ACS reagent, 37&#160;wt. % in H2O, contains 10-15% Methanol as stabilizer (to prevent polymerization)

Sigma-Aldrich

252549

Formaldeide

Formaldeide contains 10-15% methanol as stabilizer, 37&#160;wt. % in H2O

SAFC

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

Sigma-Aldrich

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1,3,5-Trioxane

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Sigma-Aldrich

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Sigma-Aldrich

15512

Formaldeide

P Somogyi et al.
Neuroscience, 7(7), 1779-1783 (1982-07-01)
The buffered picric acid paraformaldehyde fixative originally recommended for electronmicroscopy and which has since been used occasionally for light-microscopic immunocytochemistry, has been supplemented with glutaraldehyde and used as primary fixative for the perfusion of rat brains. In the basal ganglia
J Justin Mulvey et al.
International journal of nanomedicine, 9, 4245-4255 (2014-09-18)
We aimed to create a more robust and more accessible standard for amine-modifying single-walled carbon nanotubes (SWCNTs). A 1,3-cycloaddition was developed using an azomethine ylide, generated by reacting paraformaldehyde and a side-chain-Boc (tert-Butyloxycarbonyl)-protected, lysine-derived alpha-amino acid, H-Lys(Boc)-OH, with purified SWCNT
José C J M D S Menezes et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 20(42), 13644-13655 (2014-08-30)
In view of increasing demands for efficient photosensitizers for photodynamic therapy (PDT), we herein report the synthesis and photophysical characterizations of new chlorin e6 trimethyl ester and protoporphyrin IX dimethyl ester dyads as free bases and Zn(II) complexes. The synthesis of these
Ting Yao et al.
FEBS open bio, 6(7), 707-719 (2016-07-12)
Decorin (DCN) is a major member of the small leucine-rich proteoglycan (SLRP) family that is critically involved in tumorigenesis and the development of metastasis of cancers, including glioma. Overexpression of DCN was indicated to suppress glioma cell growth. However, the
Lingling Chen et al.
Scientific reports, 7(1), 12218-12218 (2017-09-25)
Optical clearing methods can facilitate deep optical imaging in biological tissue by reducing light scattering and this has enabled accurate three-dimensional signal visualization and quantification of complex biological structures. Unfortunately, existing optical clearing approaches present a compromise between maximizing clearing
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Questions

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  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 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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