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16005

Sigma-Aldrich

Paraformaldehyde

meets analytical specification of DAC, 95.0-100.5%

Sinonimo/i:

Polyoxymethylene

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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

Densità del vapore

1.03 (vs air)

Livello qualitativo

200

Tensione di vapore

<1.45 mmHg ( 25 °C)

Saggio

95.0-100.5%

Forma fisica

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

InChI

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

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Categorie correlate

Descrizione generale

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

Applicazioni

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.

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
STBL1022
STBL1058
STBL0223
STBK9967
STBK7955

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Formaldeide for molecular biology, 36.5-38% in H2O

Sigma-Aldrich

F8775

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

F1635

Formaldeide

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

Sigma-Aldrich

T81108

1,3,5-Trioxane

Glutaraldeide Grade I, 25% in H2O, specially purified for use as an electron microscopy fixative

Sigma-Aldrich

G5882

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Formaldeide meets analytical specification of USP, &#8805;34.5&#160;wt. %

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
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
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Tendon calcification is a common but intractable problem leading to pain and activity limitation when injury or tendinopathy progresses into the late stage. This is because tendon stem/progenitor cells (TSPCs) can undergo aberrant osteogenic differentiation under inflammatory conditions. This study
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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
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