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| | Paraformaldehyde Basic information |
| | Paraformaldehyde Chemical Properties |
| Melting point | 175 °C
| | Boiling point | 107.25°C (rough estimate) | | density | 0.88 g/mL at 25 °C(lit.) | | vapor density | 1.03 (vs air)
| | vapor pressure | <1.45 mm Hg ( 25 °C)
| | refractive index | 1.4540 (estimate) | | Fp | 158 °F
| | storage temp. | 2-8°C | | solubility | chlorophenol above 70°C: soluble
| | form | prilled
| | color | White to off-white | | PH | 5.5 (H2O, 20℃)(saturated solution) | | explosive limit | 7-73%(V) | | Water Solubility | sparingly soluble | | Merck | 14,7025 | | BRN | 102769 | | Stability: | Stable. Incompatible with strong acids, organic acids, strong oxidizing agents, oxides, alkalies, strong bases, amines. Combustible. Dust may form an explosive mixture with air. Liberates poisonous gases on combustion. | | InChIKey | VHWYCFISAQVCCP-UHFFFAOYSA-N | | EPA Substance Registry System | Paraformaldehyde(30525-89-4) |
| | Paraformaldehyde Usage And Synthesis |
| Chemical Properties | Paraformaldehyde is a white crystalline solid.
Irritating odor. The term “trioxane” applies specifically to
this trimer (CH2O)3 but paraformaldehyde is applied both
to trioxane and other low polymers or oligomers of formaldehyde. | | Uses | For disinfecting sickrooms, clothing, linen, and sickroom utensils. Active ingredient of contraceptive creams. Also used as fumigant; in dentistry; in manufacture of synthetic resins and artificial horn or ivory. | | Definition | ChEBI: A macromolecule composed of repeating methyleneoxy units arising from polymerisation of formaldehyde. | | General Description | A white solid with a light pungent odor. A linear polymer of formaldehyde of formula HO(CH2 O)xH where x averages about 30. Soluble in water when x is less than 12; higher polymers are not immediately soluble. Slow dissolution in water proceeds by means of hydrolysis to give fragments of lower x. Flammable, although may take some effort to ignite. Flash point 158°F. Used in fungicides, bactericides, and in the manufacture of adhesives. A hazard to the environment. Immediate steps should be taken to limit spread to the environment. | | Air & Water Reactions | Flammable. Forms aqueous solution of formaldehyde, often quite slowly. | | Reactivity Profile | Paraformaldehyde may react violently with strong oxidizing agents (hydrogen peroxide, performic acid, perchloric acid in the presence of aniline, potassium permanganate, nitromethane). May react with bases (sodium hydroxide, potassium hydroxide, ammonia), and with nitrogen dioxide (explosive reaction around 180°C). Reacts with hydrochloric acid to form highly toxic bis(chloromethyl) ether. Polymerization reaction with phenol may develop sudden destructive pressure [Bretherick, 5th ed., 1995, p.168]. May generate flammable and/or toxic gases in combination with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Generates toxic formaldehyde gas when heated. Can react with air to give first peroxo acids, and ultimately formic acid. These reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). Incompatible with liquid oxygen. | | Health Hazard | Vapor or dust irritates eyes, mucous membranes, and skin; may cause dermatitis. Ingestion of solid or of a solution in water irritates mouth, throat, and stomach and may cause death. | | Fire Hazard | Behavior in Fire: Changes to formaldehyde gas, which is highly flammable. | | Safety Profile | Moderately toxic by ingestion. A severe eye and skin irritant. Mutation data reported. Flammable when exposed to heat or flame; can react with oxidzing materials. To fight fire, use alcohol foam, COr, dry chemical. Incompatible with liquid oxygen. Dangerous; when heated to decomposition it emits toxic formaldehyde gas. See also FORMALDEHYDE. | | Potential Exposure | Paraformaldehyde is used in polyacetal
resin manufacture; as a food additive; and as an
odorless fuel. | | Shipping | UN2213 Paraformaldehyde, Hazard Class: 4.1;
Labels: 4.1-Flammable solid. | | Incompatibilities | Paraformaldehyde dust forms an explosive
mixture with air. Decomposes on contact with oxidizers,
strong acids; acid fumes; and bases; with elevated temperatures,
forming formaldehyde. May explode when heated.
May explode on impact if peroxide contamination develops.
Mixtures with hydrogen peroxide or liquid oxygen are
explosives sensitive to heat, shock, or contact with lead. | | Waste Disposal | Dissolve or mix the material
with a combustible solvent and burn in a chemical incinerator
equipped with an afterburner and scrubber. All federal,
state, and local environmental regulations must be observed. |
| | Paraformaldehyde Preparation Products And Raw materials |
| Preparation Products | alpha-butyl-alpha-phenyl-1H-imidazole-1-propiononitrile -->2-(HYDROXYETHYL)-6-METHYLPYRIDINE-->Dimethoxymethane-->3-Methyl-2-buten-1-ol-->9,10-Bis(chloromethyl)anthracene-->4-Hydroxy-2-butanone-->2-(Trifluoromethyl)benzyl bromide-->BIS(CHLOROMETHYL)ETHER-->Naftifine-->METHYL 5-(CHLOROMETHYL)-2-FUROATE-->2,5-Dichlorobenzoic acid-->8-CHLOROMETHYL-7-METHOXY-3-METHYL FLAVONE-->7-Hydroxy-6-methoxy-3,4-dihydroisoquinoline-->6-METHOXY-2-OXO-2H-CHROMENE-3-CARBOXYLIC ACID-->Hexachlorophene-->6-Methoxy-1,2,3,4-tetrahydroisoquinoline hydrochloride-->Trometamol-->5-Ethyl-2-pyridineethanol-->Fluorescent Brightener DCB-->2-(Methoxymethyl)-2-propenal-->1,3-Dioxolane-->Chloromethyl pivalate-->BUCLIZINE-->1-Chloromethyl naphthalene-->Propisochlor-->Tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate-->4,4'-Bis(chloromethyl)-1,1'-biphenyl-->4-(CHLOROMETHYL)-3,5-DIMETHYLISOXAZOLE-->Oxyfedrine-->2-HYDROXY-5-METHYLISOPHTHALALDEHYDE-->4,4'-Methylenebis(N,N-dimethylaniline)-->4,4'-BIS(BROMOMETHYL)BIPHENYL-->crosslinking aent DTF-3-->Piperonyl butoxide-->3-DIMETHYLAMINOPROPIOPHENONE HYDROCHLORIDE-->Chloramben-->cationic-type polyacrylamide-->N-Benzyl-N-methylethanolamine-->4-CHLORO-2-BUTANONE-->1,3-Dioxan-5-ol | | Raw materials | Formaldehyde |
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