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Paraformaldehyde

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Paraformaldehyde Basic information

Product Name:
Paraformaldehyde
CAS:
30525-89-4
MF:
(CH2O)n
MW:
90.08
EINECS:
608-494-5
Mol File:
30525-89-4.mol
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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)
Flash point:
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)
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Safety Information

Hazard Codes 
Xn,F
Risk Statements 
31-43-40-36/37/38-20/22-41-37/38-42/43-20/21/22-11
Safety Statements 
36-45-36/37/39-26-24-22
RIDADR 
UN 2213 4.1/PG 3
WGK Germany 
3
RTECS 
RV0540000
Autoignition Temperature
572 °F
TSCA 
Yes
HazardClass 
4.1
PackingGroup 
III
HS Code 
38084090
Hazardous Substances Data
30525-89-4(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 592 mg/kg

MSDS

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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.

Uses

Paraformaldehyde is used as a agricultural chemical, fungicide, bactericide, and wood preservative.

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.

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ParaformaldehydeSupplierMore

Chengdu RunZeBenTu Chemical Co., Ltd Gold
Tel:
13096311329 028-88469284 qq:616445927
Email:
616445927@qq.com
Shanghai Aladdin Bio-Chem Technology Co.,LTD Gold
Tel:
021-20337333/400-620-6333
Email:
sale@aladdin-e.com
TCI (Shanghai) Development Co., Ltd. Gold
Tel:
021-67121386 / 800-988-0390
Email:
Sales-CN@TCIchemicals.com
Shanghai Jizhi Biochemical Technology Co. Ltd. Gold
Tel:
400-900-4166
Email:
3007522970@qq.com
上海炎泽化工有限公司 Shanghai Yanze Chemical Co., Ltd. Gold
Tel:
13773155751
Email:
379052146@qq.com
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