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441244

Sigma-Aldrich

Paraformaldehyde

prilled, 95%

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:
24867646
NACRES:
NA.22

Densità del vapore

1.03 (vs air)

Livello qualitativo

200

Tensione di vapore

<1.45 mmHg ( 25 °C)

Saggio

95%

Stato

prilled

Temp. autoaccensione

572 °F

Limite di esplosione

73 %

Punto di fusione

120-170 °C (lit.)

Temp. transizione

sublimation point 150 °C

Solubilità

alcohol and cold water: slightly soluble
ethers, hydrocarbons and carbon tetrachloride: insoluble

Densità

0.88 g/mL at 25 °C (lit.)

Stringa SMILE

[O-]#[C+H2]

InChI

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

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Categorie correlate

Descrizione generale

Paraformaldehyde, a polymerization product of formaldehyde, is used in the polycondensation reaction for the synthesis of thermoset polymers.

Paraformaldehyde is also referred as polyoxymethylene. It participates in the regioselective reductive coupling reactions of dienes, alkynes and allenes in the presence of ruthenium catalyst. It also participates in the synthesis of esters, via alkoxycarbonylation of alkenes.

Applicazioni

Formaldehyde source to prepare phenol-, urea-, furfuryl alcohol-, resorcinol- and melamine-formaldehyde polymers for use in coatings, wood products, textiles and foundry resins.
Paraformaldehyde may be used in the preparation of azomethine ylide, α-methylenechromanes, α-methylenequinoline and ortho-quinone methides.

Caratteristiche e vantaggi

Source of methanol-free formaldehyde.
Decomposes in hot water to give formaldehyde.

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
MKCR0710
MKCQ3100
MKCP7153
MKCP3316
MKCP3315

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Ruthenium-Catalyzed Alkoxycarbonylation of Alkenes with Paraformaldehyde as a Carbon Monoxide Substitute.
Liu Q, et al.
ChemCatChem, 6(10), 2805-2809 (2014)
Brannon Sam et al.
Angewandte Chemie (International ed. in English), 54(11), 3267-3274 (2014-11-29)
Ruthenium-catalyzed reductive couplings of paraformaldehyde with dienes, alkynes, and allenes provide access to products of hydrohydroxymethylation that cannot be formed selectively under the conditions of hydroformylation. In certain cases, the regioselectivity of the CC coupling can be inverted by using
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
Tineke Veenendaal et al.
Biology open, 3(6), 431-443 (2014-05-06)
GRASP65 and GRASP55 are peripheral Golgi proteins localized to cis and medial/trans cisternae, respectively. They are implicated in diverse aspects of protein transport and structure related to the Golgi complex, including the stacking of the Golgi stack and/or the linking
Aditi Dubey et al.
PloS one, 11(11), e0165642-e0165642 (2016-11-02)
Selenocysteine (Sec) is a critical residue in at least 25 human proteins that are essential for antioxidant defense and redox signaling in cells. Sec is inserted into proteins cotranslationally by the recoding of an in-frame UGA termination codon to a
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Global Trade Item Number

SKUGTIN
441244-1KG4061835052332
441244-3KG4061832281896

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