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16005

Sigma-Aldrich

Paraformaldehyde

meets analytical specification of DAC, 95.0-100.5%

Synonyme(s) :

Polyoxymethylene

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About This Item

Formule linéaire :
HO(CH2O)nH
Numéro CAS:
Poids moléculaire :
30.03 (as monomer)
Numéro MDL:
Code UNSPSC :
12352100
ID de substance PubChem :
Nomenclature NACRES :
NA.22

Densité de vapeur

1.03 (vs air)

Niveau de qualité

Pression de vapeur

<1.45 mmHg ( 25 °C)

Pureté

95.0-100.5%

Forme

pellets

Température d'inflammation spontanée

572 °F

Qualité

meets analytical specification of DAC

Limite d'explosivité

73 %

Technique(s)

NMR: suitable

Impuretés

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

Pf

120-170 °C (lit.)

Solubilité

water: insoluble

Densité

0.88 g/mL at 25 °C (lit.)

Adéquation

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

Température de stockage

2-8°C

InChI

1S/CH2O/c1-2/h1H2

Clé InChI

WSFSSNUMVMOOMR-UHFFFAOYSA-N

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Description générale

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

Application

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

Mention d'avertissement

Danger

Classification des risques

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

Organes cibles

Respiratory system

Code de la classe de stockage

4.1B - Flammable solid hazardous materials

Classe de danger pour l'eau (WGK)

WGK 2

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

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


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Consulter la Bibliothèque de documents

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
Lili Wang et al.
Cytometry. Part A : the journal of the International Society for Analytical Cytology, 81(7), 567-575 (2012-04-28)
To transform the linear fluorescence intensity scale obtained with fluorescent microspheres to an antibody bound per cell (ABC) scale, a biological cell reference material is needed. Optimally, this material should have a reproducible and tight ABC value for the expression

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