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Tetrahydromethyl-1,3-isobenzofurandione, also known as Methyltetrahydrophthalic Anhydride (MTHPA), is a colorless or light yellow liquid with versatile chemical properties. It is a derivative of isobenzofurandione and has a tetrahydro structure, which contributes to its unique characteristics and applications.

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  • 11070-44-3 Structure
  • Basic information

    1. Product Name: Tetrahydromethyl-1,3-isobenzofurandione
    2. Synonyms: 4-METHYL TETRAHYDROPHTHALIC ANHYDRIDE;3-METHYL-DELTA4-TETRAHYDROPHTHALIC ANHYDRIDE;3-METHYL-4-CYCLOHEXENE-1,2-DICARBOXYLIC ANHYDRIDE;3-METHYL-4-CYCLOHEXEN-1,2-DICARBOXYLIC ANHYDRIDE;AC-METHYL;1-METHYL-5-CYCLOHEXENE-2,3-DICARBOXYLIC ANHYDRIDE;METHYL-1,2,3,6-TETRAHYDROPHTHALIC ANHYDRIDE;METHYLCYCLOHEXENE-1,2-DICARBOXYLIC ANHYDRIDE
    3. CAS NO:11070-44-3
    4. Molecular Formula: C9H10O3
    5. Molecular Weight: 166.17
    6. EINECS: 247-830-1
    7. Product Categories: N/A
    8. Mol File: 11070-44-3.mol
  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: 306.7 °C at 760 mmHg
    3. Flash Point: 157 °C
    4. Appearance: /
    5. Density: 1,21 g/cm3
    6. Vapor Pressure: 0.00184mmHg at 25°C
    7. Refractive Index: 1.4970 to 1.5020
    8. Storage Temp.: N/A
    9. Solubility: N/A
    10. Water Solubility: Soluble in water
    11. CAS DataBase Reference: Tetrahydromethyl-1,3-isobenzofurandione(CAS DataBase Reference)
    12. NIST Chemistry Reference: Tetrahydromethyl-1,3-isobenzofurandione(11070-44-3)
    13. EPA Substance Registry System: Tetrahydromethyl-1,3-isobenzofurandione(11070-44-3)
  • Safety Data

    1. Hazard Codes: Xn
    2. Statements: 36/37/38-42/43-41
    3. Safety Statements: 26-36/37/39-37/39-24-22
    4. RIDADR: UN 3082 9/PG III
    5. WGK Germany:
    6. RTECS: TI3325000
    7. HazardClass: 9
    8. PackingGroup: III
    9. Hazardous Substances Data: 11070-44-3(Hazardous Substances Data)

11070-44-3 Usage

Uses

Used in Epoxy Resin Industry:
Tetrahydromethyl-1,3-isobenzofurandione is used as a curing agent for epoxy resins, providing excellent performance such as long-term storage at room temperature, low freezing point, low volatility, and low toxicity. This makes it suitable for various applications, including solvent-free paints, laminated boards, and epoxy adhesives.
Used in Electrical Industry:
In the electrical industry, Tetrahydromethyl-1,3-isobenzofurandione is utilized in the production of motors, dry-type transformers, appliances capacitors, and power capacitors. Its properties contribute to the enhanced performance and reliability of these electrical components.
Used in Electronics Industry:
Tetrahydromethyl-1,3-isobenzofurandione is used in the impregnation of integrated circuits, casting, and winding processes. Its application in these areas helps improve the overall performance and durability of electronic devices.
Used in Conductive Adhesive Preparation:
Tetrahydromethyl-1,3-isobenzofurandione is also employed in the preparation method of conductive adhesives, which are essential for various electronic and electrical applications, including the assembly of components and the creation of conductive pathways.

Flammability and Explosibility

Nonflammable

Check Digit Verification of cas no

The CAS Registry Mumber 11070-44-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,1,0,7 and 0 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 11070-44:
(7*1)+(6*1)+(5*0)+(4*7)+(3*0)+(2*4)+(1*4)=53
53 % 10 = 3
So 11070-44-3 is a valid CAS Registry Number.
InChI:InChI=1/C9H10O3/c1-9-5-3-2-4-6(9)7(10)12-8(9)11/h3,5-6H,2,4H2,1H3

11070-44-3SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017

1.Identification

1.1 GHS Product identifier

Product name Tetrahydromethyl-1,3-Isobenzofurandione

1.2 Other means of identification

Product number -
Other names 3a-methyl-5,6-dihydro-4H-2-benzofuran-1,3-dione

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:11070-44-3 SDS

11070-44-3Upstream product

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