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441244

Sigma-Aldrich

Paraformaldehyde

prilled, 95%

Sinônimo(s):

Polyoxymethylene

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About This Item

Fórmula linear:
HO(CH2O)nH
Número CAS:
30525-89-4
Peso molecular:
30.03 (as monomer)
Número MDL:
MFCD00133991
Código UNSPSC:
12352100
ID de substância PubChem:
24867646
NACRES:
NA.22

densidade de vapor

1.03 (vs air)

pressão de vapor

<1.45 mmHg ( 25 °C)

Ensaio

95%

Formulário

prilled

temperatura de autoignição

572 °F

Lim. expl.

73 %

pf

120-170 °C (lit.)

temperatura de transição

sublimation point 150 °C

solubilidade

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

densidade

0.88 g/mL at 25 °C (lit.)

cadeia de caracteres SMILES

[O-]#[C+H2]

InChI

1S/CH2O/c1-2/h1H2

chave InChI

WSFSSNUMVMOOMR-UHFFFAOYSA-N

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Descrição geral

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.

Aplicação

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.

Características e benefícios

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

Palavra indicadora

Danger

Classificações de perigo

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

Órgãos-alvo

Respiratory system

Código de classe de armazenamento

4.1B - Flammable solid hazardous materials

Classe de risco de água (WGK)

WGK 2

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

Equipamento de proteção individual

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

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Certificados de análise (COA)

Lot/Batch Number
MKCR0710
MKCQ3100
MKCP7153
MKCP3316
MKCP3315

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Supelco

FX0410

Formaldehyde Solution

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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