Detail of "34090-76-1"

CAS Number:
34090-76-1
Name:
4-Methylhexahydrophthalic anhydride
Molecular Structure:
Formula:
C₉H₁₂O₃
Molecular Weight:
168.19
Synonyms:
HEXAHYDRO-3-METHYLPHTHALIC ANHYDRIDE;3-METHYL-1,2-CYCLOHEXANEDICARBOXYLIC ANHYDRIDE;4-METHYLCYCLOHEXANE-1,2-DICARBOXYLIC ANHYDRIDE;tetrahydro-5-methyl-3-isobenzofurandione;tetrahydro-4-methylphthalic anhydride;Methyltetrahydrophthalic Anhydride (MTHPA);1,3-Isobenzofurandione, tetrahydro-5-methyl-;4-METHYLCYCLOHEXANE-1,2-DICARBOXYLIC ANHYDRIDE 97+%
EINECS:
251-823-9
Density:
1.162 g/mL at 25 °C(lit.)
Melting Point:
-29 °C
Boiling Point:
120 °C (0.7501 mmHg)
Flash Point:
>230 °F
Hazard Symbols:
Xn
Risk Codes:
41-42/43
Safety:
22-24-26-37/39 Details

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Isomers of 4-methyltetrahydrophthalic acid derivatives and/or tetrahydrophthalic acid derivatives, specifically its anhydrides: Isomers of 4-methyltetrahydrophthalic acid derivatives and/or tetrahydrophthalic acid derivatives, specifically its anhydrides. Gude, Fritz; Haferkorn, Herbert (Chemische Werke Huels A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3239055 A1 26 Apr 1984, 12 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07D307-89; C07C069-75; C07C061-24. APPLICATION: DE 82-3239055 22 Oct 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 24, 27, 67 The title compds., useful as liq. curing agents for epoxy resins, are prepd. by isomerizing 4-cyclohexene-1,2-dicarboxylic acid derivs. in the presence of activated fuller's earth at 150-220°. Thus, heating 4-methyl-4-cyclohexene-1,2-dicarboxylic anhydride (I) [3425-89-6] with 7% montmorillonite (K 10) at 150° for 1 h gave a storage-stable, pale yellow oil (f.p. -5°) contg. I 26.5, 3 I isomers [34090-76-1] 57.2, 8.8, and 0.1, and org. acids 1.Several reagents such as 4717-57-1 is used here.2%. .

Process for producing isobenzofurandiones: Process for producing isobenzofurandiones. Kaesbauer, Josef; Fiege, Helmut (Bayer A.-G., Germany). Eur. Pat. Appl. EP 755914 A1 29 Jan 1997, 6 pp. DESIGNATED STATES: R: AT, BE, CH, DE, ES, FR, GB, IE, IT, LI, NL.There are some reagents with their cas registry numbers 7440-06-4 and 34090-76-1 are used in this study. (German). (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: C07C063-15. ICS: C07C063-16; C07C051-377. APPLICATION: EP 1996-111158 11 Jul 1996. PRIORITY: DE 1995-19526923 24 Jul 1995. DOCUMENT TYPE: Patent CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) 5-(R-substituted)-1,3-isobenzofurandiones (R = C1-C6 alkyl) were prepd. by the catalytic dehydrogenation of tetrahydroisobenzofurandiones at high temps. Tetrahydroisobenzofurandione was distd. in presence of Pd- and/or Pt-supported catalyst and in the presence of maleic or fumaric acid derivs. heated at 120-300° in a trickle-phase or dense-phase processes. The sludge phase process was raised from 80-110° at a rate of 0.6-3° per min. .