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129-64-6

3aalpha,4,7,7aalpha-Tetrahydro-4alpha,7alpha-methanoisobenzofuran-1,3-d one

CAS: 129-64-6;826-62-0

Molecular Formula: C9H8O3

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129-64-6 - Names and Identifiers

Name 3aalpha,4,7,7aalpha-Tetrahydro-4alpha,7alpha-methanoisobenzofuran-1,3-d one
Synonyms Himic anhydride
Nadic anhydride
Carbic anhydride
cis-5-Norbornene-endo-2,3-dicarboxylic
5-Norbornene-2,3-dicarboxylic Anhydride
3-4,7,7-Tetrahydro-4,7-methanoiso-benzo-furan-1,3-dione
4,7-Methanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-
2-Methyl-5-(prop-1-en-2-yl)cyclohex-2-enecarboxylic anhydride
3aα,4α,7α,7aα-3a,4,7,7a-tetrahydro-4,7-methano-isobenzofuran-1,3-dione
3aalpha,4,7,7aalpha-Tetrahydro-4alpha,7alpha-methanoisobenzofuran-1,3-d one
(3aR,4S,7R,7aS)-rel-3a,4,7,7a-Tetrahydro-4,7-Methanoisobenzofuran-1,3-dione
4,7-Methanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-, (3aalpha,4alpha,7alpha,7aalpha)-
4,7-Methanoisobenzofuran-1,3-dione,3a,4,7,7a-tetrahydro-,(3a.alpha.,4.alpha.,7.alpha.,7a.alpha.)-
CAS 129-64-6
826-62-0
EINECS 204-957-7
InChI InChI=1/C9H8O3/c10-8-6-4-1-2-5(3-4)7(6)9(11)12-8/h1-2,4-7H,3H2/t4-,5+,6?,7?

129-64-6 - Physico-chemical Properties

Molecular FormulaC9H8O3
Molar Mass164.16
Density1.08
Melting Point165-167°C(lit.)
Boling Point251.61°C (rough estimate)
Flash Point163.801°C
Water SolubilityDECOMPOSES
Solubility Chloroform (Slightly), Methanol (Slightly)
Vapor Presure0mmHg at 25°C
AppearanceWhite lens
ColorWhite
Merck14,1796
BRN83657
Storage ConditionInert atmosphere,Room Temperature
SensitiveMoisture Sensitive
Refractive Index1.4365
MDLMFCD00151106
Physical and Chemical PropertiesWhite columnar crystals. Melting point 164-165 °c. The relative density was 1.417. Soluble in benzene, toluene, acetone, carbon tetrachloride, chloroform, ethanol, ethyl acetate, slightly soluble in petroleum ether. It is deliquescent and sublimated by heat.
UseMainly used as curing agent for epoxy resin, suitable for casting, lamination, powder molding, etc.

129-64-6 - Risk and Safety

Hazard SymbolsXn - Harmful
Harmful
Risk CodesR41 - Risk of serious damage to eyes
R42/43 - May cause sensitization by inhalation and skin contact.
Safety DescriptionS22 - Do not breathe dust.
S24 - Avoid contact with skin.
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37/39 - Wear suitable gloves and eye/face protection
WGK Germany3
RTECSDT5600000
FLUKA BRAND F CODES21
HS Code29172090

129-64-6 - Introduction

Soluble in benzene, toluene, acetone, carbon tetrachloride, chloroform, ethanol, ethyl acetate, slightly soluble in petroleum ether. It is deliquescent and sublimated by heat. The reaction with water can produce the corresponding acid, <0,01g/100g. In case of alkali decomposition.
Last Update：2022-10-16 17:13:07

129-64-6 - Reference Information

NIST chemical information Information provided by: webbook.nist.gov (external link)
overview norbornene dianhydride is an orthorhombic white columnar crystal precipitated from petroleum ether, deliquescent, melting point 164~165 ℃. Slightly soluble in petroleum ether, soluble in benzene, toluene, acetone, carbon tetrachloride, chloroform, ethanol, ethyl acetate. When heated above its melting point, it is converted into a cis-equilibrium mixture. Reacts with water to form the corresponding acid. It has a stimulating effect on the skin and mucous membranes.
application is mainly used as curing agent for epoxy resin, suitable for casting, lamination, powder molding, etc. General dosage 75-95 ℃, curing conditions: 100 ℃/2 hours 150 ℃/5h. The cured product has excellent weather resistance, heat resistance and electrical properties. The product can also be used as a raw material for polyester resin, alkyd resin, plasticizer, stability, and insecticide. Some derivatives and their uses are as follows: Diallyl norbornene diacid is used as a heat-resistant cross-linking agent for unsaturated polyesters. 3, 6-endomethylene -1,2,3, 6-tetrahydrophthalate didecyl epoxide (EDET). This is an excellent epoxy stabilizer of polyvinyl chloride, which can be obtained by esterification and epoxidation of decanol. Norbornene diacid anhydride can be used by N-hydroxy norbornene dimethyl imide to prepare O,O-dimethyl -3, 6-endomethylene -1,2,3, 6-tetrahydrophthalimide oxythiophosphate. This is a pesticide with good insecticidal effect. The product is also used as a modifier for urea-formaldehyde resin, melamine resin, turpentine, rubber vulcanization regulator, resin plasticizer, surface activator, textile finishing penetrant. The product is irritating to the skin and mucous membranes.
Used as modifier for alkyd resin, urea-formaldehyde resin, melamine resin, etc.
Production method Made by the reaction of cyclopentadiene and maleic anhydride through Diers-Alder (Diels-Alder). The reaction is carried out in benzene solution, the reaction temperature is 20-60 ℃, and the product yield is very high.
Last Update：2024-04-09 19:05:10
129-64-6
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