Grundinformationen
- Standard-SMILES
CC12CC=CCC1C(=O)OC2=O- InChIKey
SOOZEQGBHHIHEF-UHFFFAOYSA-N- Summenformel
- C9H10O3
- Durchschnittliche Molmasse
- 166,17 g/mol
- Monoisotopische Masse
- 166,06299418
Überblick
Methyltetrahydrophthalic anhydride is a cyclic dicarboxylic anhydride that is the cyclic anhydride of methyltetrahydrophthalic acid. It has a role as an allergen. It is a cyclic dicarboxylic anhydride and a tetrahydrofurandione.
Namen und Bezeichner
- Bevorzugter Name
- Methyltetrahydrophthalic anhydride
- IUPAC
- 7a-methyl-4,7-dihydro-3aH-2-benzofuran-1,3-dione
- Lokaler Name
- 1,2,3,6-Tetrahydromethylphthalsureanhydrid
- Englischer Name
- Methyltetrahydrophthalic anhydride
- Summenformel
- C9H10O3
- Molmasse
- 166.17
Namen und Synonyme
1,2,3,6-Tetrahydromethylphthalic anhydrideMTHPALindride1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl-CHEBI:55466AC 220JMeTHPARefChem:818707247-830-126590-20-5Methyl tetrahydrophthalic anhydrideMethyltetrahydrophthalic anhydride
Weitere Namen anzeigen
ac220isomethyltetrahydrophthalic anhydrideAC 2204-MTHPAMTHPA-600Methyltetrahyhedrophthalic Anhydride3-METHYL-DELTA4-TETRAHYDROPHTHALIC ANHYDRIDE4-METHYL-4-CYCLOHEXENE-1,2-DICARBOXYLIC ANHYDRIDEac220j
42498-58-83a-Methyl-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione7a-methyl-4,7-dihydro-3aH-2-benzofuran-1,3-dione2,3,5,6-Tetrahydro-2-methylphthalic anhydride3a-methyl-1,3,3a,4,7,7a-hexahydro-2-benzofuran-1,3-dioneMethy tetra-Hydro Phthalic Anhydride3a-methyl-3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dioneMethy tetra-Hydro Phthalic Anhydride(MTHPA)
Datenbank-Bezeichner
- CAS
26590-20-5、42498-58-8- PubChem CID
- 198243
- DTXSID
DTXSID40962532- ChEBI
CHEBI:55466- EC Number
- 247-830-1、255-853-3
- Nikkaji
- J169.052C
Eigenschaften
Berechnete Struktureigenschaften
- XLogP
- 1,1
- Polarare Oberfläche (TPSA)
- 43,4 Ų
- H-Brücken-Donoren
- 0
- H-Brücken-Akzeptoren
- 3
- Frei drehbare Bindungen
- 0
- Schwere Atome
- 12
- Formalladung
- 0
- Komplexität
- 279
Experimentelle und physikochemische Eigenschaften
PolymersPlastics & Rubber -> Acid Anhydrides, Cyclic
Density1.20 @25 °C
Flash Point350 °C
Boiling Point124 °C
Melting Point-29 °C
Physical Description
Liquid; [ICSC]
OILY LIQUID.
Physikochemische Eigenschaften
- Schmelzpunkt
- 63 · 63-64 °C
- Siedepunkt
- 254.38 °C · 254.38°C (rough estimate)
- Dichte
- 1.1708 · 1.1708 (rough estimate)
- Brechungsindex
- 1.55 · 1.5500 (estimate)
- storage temp.
- -20 °C · -20°C Freezer
- Löslichkeit
- DMSO (Slightly), Methanol (Slightly)
- Aggregatzustand
- Solid
- Farbe
- White
- InChI
- InChI=1S/C9H10O3/c1-9-5-3-2-4-6(9)7(10)12-8(9)11/h3,5-6H,2,4H2,1H3
- InChIKey
- CSHJJWDAZSZQBT-UHFFFAOYSA-N
- SMILES
- C1(OC(=O)C2CCC=CC12C)=O
- CAS Datenbank
- 26590 · 26590-20-5(CAS DataBase Reference)
- NIST chemische Informationen
- Methyltetrahydrophthalic anhydride(26590-20-5)
- EPA chemische Informationen
- 1 · 1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl- (26590-20-5)
Sicherheit und Regulatorisches
GHS-Klassifizierung
GHS Classification
Danger
H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
P233, P260, P261, P264+P265, P271, P272, P280, P284, P302+P352, P304+P340, P305+P354+P338, P317, P321, P333+P317, P342+P316, P362+P364, P403, and P501 (click each P-code to see the statement)
Danger
H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
P233, P260, P261, P264+P265, P271, P272, P280, P284, P302+P352, P304+P340, P305+P354+P338, P317, P321, P333+P317, P342+P316, P362+P364, P403, and P501 (click each P-code to see the statement)
Gefahrenhinweise
Regulatory Information
Chemical: 1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl-
Hazard Traits - Respiratory Toxicity
Hazard Traits - Respiratory Toxicity
1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl-: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
Other Safety InformationIMAP assessments - Tetrahydrophthalic anhydrides and analogues: Human health tier II assessment
Fire HazardsCombustible.
Hazards Summary
Occupational asthma reported in workers curing epoxy resins; [Malo] [Tarvainen K, et al. Immunologic contact urticaria due to airborne methylhexahydrophthalic and methyltetrahydrophthalic anhydrides. Contact Dermatitis. 1995 Apr;32(4):204-9.] Prolonged or repeated exposure may cause asthma and contact urticaria; [ICSC] Causes asthma, rhinitis, allergic conjunctivitis, and rarely, allergic urticaria; A surface limit (TLV-SL) of 0.7 mg/100 cm2 is recommended to protect against induction of respiratory sensitization from skin contact with workplace surfaces. [ACGIH] See ACID ANHYDRIDES.
EC ClassificationSymbol: Xn; R: 41-42/43; S: (2)-22-24-26-37/39; Note: C
Hazard Classes and Categories
Skin Sens. 1 (100%)
Skin Sens. 1 (100%)
Eye damage - category 1
Eye damage - category 1
Eye Dam. 1
Eye Dam. 1
Sicherheit und Schutzausrüstung
Fire FightingIn case of fire in the surroundings, use appropriate extinguishing media.
First Aid Measures
Fresh air, rest.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention if skin irritation occurs.
Rinse with plenty of water (remove contact lenses if easily possible).
Rinse mouth.
Spillage DisposalPersonal protection: chemical protection suit including self-contained breathing apparatus. Collect leaking liquid in covered containers.
Eye PreventionWear face shield or eye protection in combination with breathing protection.
Fire PreventionNO open flames.
Skin PreventionProtective gloves. Protective clothing.
Exposure PreventionAVOID ALL CONTACT!
Ingestion PreventionDo not eat, drink, or smoke during work.
Inhalation PreventionUse ventilation, local exhaust or breathing protection.
Threshold Limit Values (TLV)
0.00007 [ppm], (TLV-SL = 0.7 mg/100 cm2)
0.0003 [ppm]
0.00007 ppm as TWA; 700 μg/100 cm
Effects of Long Term ExposureRepeated or prolonged inhalation may cause asthma. The substance may have effects on the skin. This may result in contact urticaria.
Protective Action Criteria (PAC)
0.075 [mg/m3]
83 [mg/m3]
500 [mg/m3]
Toxikologische Informationen
Adverse EffectsAsthma - Reversible bronchoconstriction (narrowing of bronchioles) initiated by the inhalation of irritating or allergenic agents.
Exposure RoutesThe substance can be absorbed into the body by inhalation.
Signs and Symptoms
Cough.
Redness.
Redness.
Sicherheitsdaten
- tsca
- TSCA listed
Chemie und Industrie
Verwendung und Herstellung
Uses
Exposures have been reported in workers applying polyester resin glues and curing epoxy and alkyl resins; [NIOSHTIC] Used as a hardener in epoxy resin systems; [ChemIDplus]
Working with Glues and Adhesives [Category: Other]
General Manufacturing Information1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl-: ACTIVE
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Ergänzende Hinweise
DefinitionChEBI: A cyclic dicarboxylic anhydride that is the cyclic anhydride of methyltetrahydrophthalic acid.
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