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Pyromellitic Dianhydride

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Pyromellitic Dianhydride Cov ntaub ntawv yooj yim

Khoom npe:	Pyromellitic Dianhydride
Synonyms:	1,2,4,5-Benzenetetracarboxylic 1,2:4,5-dianhydride;1,2,4,5benzenetracarboxylic1,2:4,5dianhydride;1,2,4,5- benzenetetracarboxylic 1,2:4,5-dianhydride; 1,2,4,5-Benzenetracrboxylicdianhydride; pyromelliticacidanhydride; pyromelliticaciddianhydride; Pyromelliticanhydride; 1,2,4,{{31}DEV TEEV CHAW UA HAUJ LWM
CAS:	89-32-7
MF:	C10H2O6
MW:	218.12
EINECS:	201-898-9
Khoom Categories:	Cov tshuaj zoo; Organics; Intermediates ntawm Dyes thiab Pigments; Benzene derivates; tshuaj zoo, tshuaj tshwj xeeb, intermediates, hluav taws xob chemical, organic synthesis; zoo tshuaj, tshuaj tshwj xeeb, intermediates, hluav taws xob tshuaj, organic synthesis, cov ntaub ntawv ua haujlwm; Aromatic Tetracarboxylic Dianhydrides ( Kev Tshawb Fawb Kev Ua Haujlwm Siab Polymer); Cov Khoom Siv Ua Haujlwm; Reagent rau Kev Ua Haujlwm Siab Polymer Kev Tshawb Fawb
Mol File:	89-32-7.mol

Pyromellitic Dianhydride Cov Khoom Siv Tshuaj

Melting point	283-286 degree (lit.)
Boiling point	397-400 degree (lit.)
ceev	1,68 g / cm 2³
vapor siab	0Pa ntawm 25 degree
Refractive Index	1.6000 (kwv yees)
Fp	380 degree
solubility	Soluble nyob rau hauv dimethyl sulfoxide, acetone, chloroform, ethyl ether, n-hexane thiab benzene.
daim ntawv	Hmoov zoo
pka ua	5.45 [ntawm 20 degree]
xim	Dawb mus daj daj
Dej Solubility	decomposes
rhiab heev	Moisture Sensitive
BRN	213583
InChIKey	ANSXAPJVJOKRDJ-UHFFFAOYSA-N
LogP	-2.03 ntawm 21.5 degree
CAS DataBase Reference	89-32-7(CAS DataBase Reference)
NIST Chemistry Reference	1,2,4,5-Benzenetetracarboxylic anhydride (89-32-7)
EPA Tshuaj Registry System	1H,3H-Benzo[1,2-c:4,5-c']difuran-1,3,5,7-tetrone (89-32-7)

Cov ntaub ntawv kev nyab xeeb

Hazard Codes	Xn
Risk Statements	41-42/43
Cov lus hais txog kev nyab xeeb	22-24-26-37/39
WGK Germany	1
RTECS	wb 9300000
F	10-21
TSCA	Yog lawm
HS Code	29173980
Cov Ntaub Ntawv Muaj Xwm Ceev	89-32-7( Cov ntaub ntawv muaj phom sij)

MSDS Cov Ntaub Ntawv

Tus kws kho mob	Lus
1,2,4,5-Benzenetetracarboxylic anhydride	Lus Askiv
SigmaAldrich	Lus Askiv
ACROS	Lus Askiv
ALFA	Lus Askiv

Pyromellitic Dianhydride Kev Siv Thiab Synthesis

Chemical Properties	Dawb hmoov. Soluble nyob rau hauv ib co organic solvents; hydrolyzes rau cov kua qaub thaum raug cov dej noo.
Siv	Pyromellitic dianhydride (PMDA) yog ua haujlwm los ua tus neeg sawv cev kho rau epoxy resins siv rau casting, laminating, tsim cov hmoov molding, adhesives thiab coatings.
Siv	Pyromellitic dianhydride yog siv los ua monomer hauv kev npaj ntawm polyimide polymers xws li kapton; thermoplastics xws li polyesters, polyethers, plasticizers, thiab expoxy resins. Nws koom nrog hauv kev npaj cov txheej txheem kev ua haujlwm siab vim nws cov khoom siv hluav taws xob, thermal thiab oxidative stability. Nws ua raws li tus neeg sawv cev kho rau epoxy resins uas pom daim ntawv thov hauv cov nplaum, coatings thiab molding hmoov. Raws li qhov nruab nrab, nws ua lub luag haujlwm tseem ceeb hauv cov khoom siv polyimide xws li cov ntawv luam tawm hauv Circuit Court, daim kab xev automated bonding thiab sib nqus hlau rwb thaiv tsev.
Kev npaj	Pyromellitic Dianhydride yog npaj los ntawm roj-theem oxidation ntawm 1,2,4,5-tetramethylbenzene (los yog lwm yam tetrasubstituted benzene derivatives). Ib qho kev sib npaug zoo tshaj plaws yog: C6H2(CH3)4 + 6 O2 → C6H2(C2O3)2 + 6 H2O Hauv chav kuaj, nws tuaj yeem npaj tau los ntawm lub cev qhuav dej ntawm pyromellitic acid siv acetic anhydride.
Daim ntawv thov	Pyromellitic dianhydride (PMDA) tau siv dav los ua ib qho tseem ceeb monomer hauv kev npaj ntau yam thermoplastics xws li polyesters, polycarbonates, polyethers polyethers, plasticizersplasticizers, expoxy resins, thiab lwm yam. Tsis tas li ntawd, nws kuj tseem siv tau rau kev npaj cov txheej txheem kev ua haujlwm siab. uas tau dav siv nyob rau hauv ntau lub teb nyob rau hauv peb lub neej niaj hnub beacuase ntawm nws zoo heev thermal, oxidative stability thiab zoo heev txhua yam khoom. Pyromellitic dianhydride (PMDA) yog ib qho ntawm ntau cov tshuaj tiv thaiv acid anhydrides thiab siv dav hauv kev tsim cov thermoplastics thiab cov txheej txheem ua haujlwm siab. Anhydrides suav nrog PMDA yog cov tshuaj ua pa ua pa thiab cov tshuaj tiv thaiv tam sim ntawd. Qee cov anhydrides tau cuam tshuam nrog kev ua haujlwm asthma. PMDA kuj tau cuam tshuam txog kev ua haujlwm hawb pob.
Kev piav qhia dav dav	Pyromellitic dianhydride (PMDA) yog ib qho acidic anhydride uas tuaj yeem siv los ua tus neeg saib xyuas kho thiab ua cov saw txuas ntxiv hauv kev tsim cov polyethylene terephthalate (PET) raws li cov saw txuas ntxiv. Nws yog tsuas yog siv hauv kev tsim cov thermoplastics thiab lwm yam kev siv txheej txheej.
Hazard	Daim tawv nqaij irritant.
Flammability thiab Explosibility	Tsis cais
Txoj Kev Purification	Crystallize dianhydride los ntawm ethyl methyl ketone los yog dioxane. Qhuav, thiab sublime nws hauv vacuo.[Beilstein 19 H 196, 19/5 V 407.]

Pyromellitic Dianhydride Kev Npaj Cov Khoom Siv thiab Cov Khoom Raw

Cov khoom nyoos

m-Xylene-->P-XYLENE-->Anthracene-->1,2,4-Trimethylbenzene-->Chromic acid-->1,2,4,5-Tetramethylbenzene-->N-PROPYLBENZENE-->tetramethylbenzene muaj nyob rau hauv cov tshuaj

Cov khoom npaj

1,2,4,5-TETRACYANOBENZENE-->1,2,4,5-BENZENETETRACARBOXAMIDE-->PYROMELLITIC DIIMIDE-->Polyimide film-->1,2,4,5-Cyclohexanetetracarboxylic Dianhydride-->2,6-Bis(2-pyridinyl)benzo[1,2-c:4,5-c']dipyrrole-1,3,5,7-tetrone-->2,6-Bis(3-hydroxyphenyl)-1,3,5,7-tetraoxo-1,2,3,5,6,7-hexahydrobenzo[1,2-c:4,5-c']dipyrrole-->1,2,4,5-Benzenetetrakis(carbonyl chloride)-->4-pmpmd-->2,2-(1,3,5,7-tetraoxo-5,7-dihydropyrrolo(3,4-f)isoindole-2,6 (1H, 3H) diyl) dibenzoic acid

Cim npe nrov: Tuam Tshoj pyromellitic dianhydride manufacturers, lwm tus neeg, Hoobkas

Tug: HEXADECYL ACRYLATE

Tom ntej: Tsis muaj

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