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ChemicalBook--->CAS DataBase List--->9002-81-7

9002-81-7

9002-81-7 Structure

9002-81-7 Structure
IdentificationBack Directory
[Name]

Polyoxymethylene
[CAS]

9002-81-7
[Synonyms]

F 20
100P
LA 543
Takafest
PARAFORM
Tenac 7010
Tenac 5010
POLYACETAL
Tenac 3010
Polymethanal
ACETAL RESIN
Tenac PT 300
Tenac LA 543
Tenac 3013ABK
POLY(TRIOXANE)
POLYOXMETHYLENE
PARAFORMALDEHYD
Poly-s-trioxane
POLYOXYMETHYLENE
POLYFORMALDEHYDE
POLYACETAL RESIN
FORMALDEHYDE RESIN
Polymethylene oxide
polyoxymethylene rod
Poly(1,3,5-trioxane)
polyformaldehyde(POM)
Poly(methylene ether)
F 20 (polyoxyalkylene)
alpha-Poly(oxymethylene)
Formaldehyde, homopolymer
1,3,5-Trioxane, homopolymer
Modified polyoxymethylene POM
poly(oxymethylene) macromolecule
polyacetalresin(polyformaldehyde)
POLY(OXYMETHYLENE), ACETATE END-CAPPED
[EINECS(EC#)]

200-001-8
[Molecular Formula]

C3H6O3X2
[MDL Number]

MFCD00133991
[MOL File]

9002-81-7.mol
[Molecular Weight]

90.08
Chemical PropertiesBack Directory
[Melting point ]

175 °C
[density ]

1.42 g/mL at 25 °C
[vapor density ]

1.03 (vs air)
[vapor pressure ]

<1.45 mm Hg ( 25 °C)
[Fp ]

158 °F
[solubility ]

chlorophenol above 70°C: soluble
[form ]

prilled
[Dielectric constant]

3.6(Ambient)
[EPA Substance Registry System]

Poly(oxymethylene) (9002-81-7)
Safety DataBack Directory
[Hazard Codes ]

Xn
[Risk Statements ]

31
[Safety Statements ]

36
[RIDADR ]

UN 2213 4.1/PG 3
[WGK Germany ]

3
[RTECS ]

RV0540000
Raw materials And Preparation ProductsBack Directory
Hazard InformationBack Directory
[Uses]

Acetal resins, also known as polyoxymethylene and polyformaldehyde, are polymers of pure formaldehyde with unusually good mechanical properties. They are resistant to elongation and impact and replace light metals in many uses. The finished polymer has not been related to adverse health effects in humans or animals. They can be thermally degraded, for example, in an overheated molding machine, to produce formaldehyde gas, with its well-recognized irritant and sensitizing properties.
[Definition]

ChEBI: A poly(alkylene oxide) macromolecule, composed of repeating methyleneoxy units.
[Industrial uses]

Polyoxymethylene, or polyacetal, resins arepolymers of formaldehyde. With high molecularweights and high degrees of crystallinity, theyare strong and tough and are established in thegeneral class of engineering thermoplastics.
Although somewhat similar to polyethylenein general molecular structure, polyacetal moleculespack more closely, and attract each otherto a much greater extent, so that the polymer isharder and higher-melting than polyethylene.Polyacetals are typically strong and tough,resistant to fatigue, creep, organic chemicals(but not strong acids or bases), and have lowcoefficients of friction. Electrical properties arealso good. Improved properties for particularapplication may be attained by reinforcementwith fibers of glass or polytetrafluoroethylene.
The combination of properties has led tomany uses such as plumbing fittings, pump andvalve components, bearings and gears, computerhardware, automobile body parts, andappliance housings. Other aldehydes may bepolymerized in a similar way.
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