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Paraformaldehyde information


Paraformaldehyde
Names
IUPAC name
Polyoxymethylene
Identifiers
CAS Number
  • 30525-89-4 checkY
ChemSpider
  • none
ECHA InfoCard 100.108.270 Edit this at Wikidata
EC Number
  • 608-494-5
UNII
  • Y19UC83H8E checkY
UN number 2213
CompTox Dashboard (EPA)
  • DTXSID8034798 Edit this at Wikidata
Properties
Chemical formula
OH(CH2O)nH (n = 8 - 100)
Appearance White powder with formaldehyde-like odour
Density 1.46 g/cm3
Melting point 120 °C (248 °F; 393 K)
Solubility in water
slightly soluble
Vapor pressure 1.579 kPa
Hazards
GHS labelling:[1]
Pictograms
GHS02: FlammableGHS08: Health hazard
Signal word
Danger
Hazard statements
H228, H302, H315, H317, H318, H332, H334, H351
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuelInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
3
2
1
Flash point 71 °C (160 °F; 344 K)
Autoignition
temperature
300 °C (572 °F; 573 K)
Explosive limits 7.0% (low), 73% (high)
Lethal dose or concentration (LD, LC):
LD50 (median dose)
800 mg/kg (rat, oral)
LC50 (median concentration)
1070 mg/m3 (rat, 4h)
Safety data sheet (SDS) Fisher Scientific
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Paraformaldehyde (PFA) is the smallest polyoxymethylene, the polymerization product of formaldehyde with a typical degree of polymerization of 8–100 units. Paraformaldehyde commonly has a slight odor of formaldehyde due to decomposition. Paraformaldehyde is a poly-acetal.

  1. ^ "C&L Inventory". echa.europa.eu. Retrieved 27 December 2021.

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Paraformaldehyde

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units. Paraformaldehyde commonly has a slight odor of formaldehyde due to decomposition. Paraformaldehyde is a poly-acetal. Paraformaldehyde forms slowly...

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Formaldehyde

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compound is a pungent, colourless gas that polymerises spontaneously into paraformaldehyde. It is stored as aqueous solutions (formalin), which consists mainly...

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Karnovsky fixative

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microscopy. The stock solution for Karnovsky fixative is as follows: 2.0 g paraformaldehyde 25 ml distilled water 1M sodium hydroxide 2 to 4 drops 50% glutaraldehyde...

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PFA

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Front Party of Azerbaijan (PFPA) Professional Fraternity Association Paraformaldehyde, a fixation solution Perfluoroalkoxy alkane, a plastic or polymer resin...

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Methanediol

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related and convertible to the industrially significant derivatives paraformaldehyde ((CH2O)n), formaldehyde (H2C=O), and 1,3,5-trioxane ((CH2O)3). Methanediol...

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Ether

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high molar mass Preparation Repeating unit Examples of trade names Paraformaldehyde Polyoxymethylene (POM) or polyacetal or polyformaldehyde Step-growth...

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Judy Buenoano

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pills" which Buenoano had been giving Gentry contained arsenic and paraformaldehyde. Exhumations of Michael Goodyear, James Goodyear, and Bobby Joe Morris...

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Trimethylamine

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chloride has been prepared by a reaction of ammonium chloride and paraformaldehyde: 9 (CH2=O)n + 2n NH4Cl → 2n (CH3)3N•HCl + 3n H2O + 3n CO2 Trimethylamine...

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Photographic developer

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original lithographic developer contained formaldehyde (often added as paraformaldehyde powder) in a low sulfite/bisulfite solution. Most developers also contain...

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Jeewanu

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published the successful synthesis of amino acids from a mixture of paraformaldehyde, colloidal molybdenum oxide or potassium nitrate and ferric chloride...

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Tishchenko reaction

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Tishchenko reaction of paraformaldehyde in the presence of aluminum methylate or magnesium methylate forms methyl formate. Paraformaldehyde reacts with boric...

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Trihexyphenidyl

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synthesized in turn by the aminomethylation of acetophenone using paraformaldehyde and piperidine in a Mannich reaction. In the second step the...

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Acetone

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acetone to a polyketal (PKA) would be analogous to the formation of paraformaldehyde from formaldehyde, and of trithioacetone from thioacetone. In 1960...

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Grignard reagent

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(ROMgBr). The phenoxide derivative is susceptible to formylation by paraformaldehyde to give salicylaldehyde. Like organolithium compounds, Grignard reagents...

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Silazane

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sensitive. With water they convert to silanols or siloxanes. Phosphazene Paraformaldehyde Adamson, G. W.; Daly, J. J. (1970). "Crystal and Molecular Structure...

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Cyanates, dimethoxymethane, formaldehyde, hexamethylenetetramine, paraformaldehyde, and triallylcyanurate Phenol Acetone, alpha-methylstyrene (AMS), cumene...

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Polyoxymethylene dimethyl ethers

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from methylal and formaldehyde or a formaldehyde equivalent such as paraformaldehyde or trioxane. PODE is used as a diesel fuel additive and as a solvent...

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Root canal treatment

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Another option is to use an antiseptic filling material containing paraformaldehyde like N2. Endodontics includes both primary and secondary endodontic...

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Salicylaldehyde

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by the Duff reaction, Reimer–Tiemann reaction, or by treatment with paraformaldehyde in the presence of magnesium chloride and a base. Salicylaldehyde can...

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Cosmetics

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the use of certain substances, such as pyrogallol, formaldehyde, or paraformaldehyde, and bans the use of others, such as lead acetate in cosmetic products...

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Polyoxymethylene

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Dalziel Hammick Forensic engineering Forensic polymer engineering Paraformaldehyde Polymer degradation Resin "Colored Delrin". Retrieved 12 March 2021...

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Scanning electron microscope

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1A–149A. JSTOR 1604673. Kiernan, J. A. (2000). "Formaldehyde, formalin, paraformaldehyde and glutaraldehyde: What they are and what they do". Microscopy Today...

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Casiraghi formylation

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formylation is the formation of a salicylaldehyde from a phenol and paraformaldehyde. The reaction requires a strong Brønsted base and a weak Lewis acid...

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