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19438-60-9

Hexahydro-4-methylphthalic anhydride, also known as Methylhexahydrophthalic anhydride (MHHP A), is a congener of phthalic anhydride. It is an epoxy hardener and an irritant to skin and mucus membranes. MHHP A is structurally similar to methyltetrahydrophthalic anhydride (MTHP A), which can also cause sensitization. It has a melting point of 29 °C, making it a liquid at room temperature, and a boiling point of 120 °C. At 25 °C, its density is 1.162 g/mL.

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  • 19438-60-9 Structure

  • Basic information

    1. Product Name: Hexahydro-4-methylphthalic anhydride
    2. Synonyms: HEXAHYDRO-4-METHYLPHTHALIC ANHYDRIDE;HEXAHYDRO-3-METHYLPHTHALIC ANHYDRIDE;3-METHYL-1,2-CYCLOHEXANEDICARBOXYLIC ANHYDRIDE;4-METHYL-1,2-CYCLOHEXANEDICARBOXYLIC ANHYDRIDE;4-METHYLCYCLOHEXANE-1,2-DICARBOXYLIC ANHYDRIDE;MHHPA;3-Isobenzofurandione,hexahydro-5-methyl-1;4-methylcyclohexyl-1,6-dicarboxylicacidanhydride
    3. CAS NO:19438-60-9
    4. Molecular Formula: C9H12O3
    5. Molecular Weight: 168.19
    6. EINECS: 243-072-0
    7. Product Categories: Organics
    8. Mol File: 19438-60-9.mol

  • Chemical Properties

    1. Melting Point: -29°C
    2. Boiling Point: 120°C (1 mmHg)
    3. Flash Point: >230 °F
    4. Appearance: Clear/Liquid
    5. Density: 1.162 g/mL at 25 °C(lit.)
    6. Vapor Pressure: 0.23Pa at 25℃
    7. Refractive Index: n20/D 1.477(lit.)
    8. Storage Temp.: Inert atmosphere,Room Temperature
    9. Solubility: Chloroform (Slightly), Ethyl Acetate (Slightly)
    10. PKA: 4.24[at 20 ℃]
    11. Water Solubility: REACTS
    12. Sensitive: Moisture Sensitive
    13. Stability: Hygroscopic, Moisture Sensitive
    14. CAS DataBase Reference: Hexahydro-4-methylphthalic anhydride(CAS DataBase Reference)
    15. NIST Chemistry Reference: Hexahydro-4-methylphthalic anhydride(19438-60-9)
    16. EPA Substance Registry System: Hexahydro-4-methylphthalic anhydride(19438-60-9)

  • Safety Data

    1. Hazard Codes: Xn
    2. Statements: 41-42/43
    3. Safety Statements: 22-24-26-37/39
    4. WGK Germany: 1
    5. RTECS:
    6. TSCA: Yes
    7. HazardClass: N/A
    8. PackingGroup: N/A
    9. Hazardous Substances Data: 19438-60-9(Hazardous Substances Data)

19438-60-9 Usage

Uses

Used in Analytical Chemistry:
Hexahydro-4-methylphthalic anhydride is used as an analytical standard for the determination of the analyte in human biological samples by gas chromatography-mass spectrometry (GC-MS).
Used in Plastics Industry:
Hexahydro-4-methylphthalic anhydride is used as an epoxy hardener in the production of plastics. It helps to improve the mechanical properties and chemical resistance of the final plastic products.
Used in Paints and Coatings Industry:
Hexahydro-4-methylphthalic anhydride is used as an epoxy hardener in the production of paints and coatings. It enhances the durability, adhesion, and resistance to chemicals and environmental factors.
Used in Electronic Components Industry:
Hexahydro-4-methylphthalic anhydride is used in the production of electronic components, such as printed circuit boards, due to its properties as an epoxy hardener. It contributes to the stability and reliability of the components.
However, it is important to note that exposure to Hexahydro-4-methylphthalic anhydride can potentially result in allergenic effects on humans and cause immunological reactions. Therefore, proper safety measures should be taken during its handling and use.

Flammability and Explosibility

Nonflammable

Contact allergens

Methylhexahydrophthalic anhydride is an epoxy hardener, irritant to skin and mucous membranes. It is included in nondiglycidyl-ether-of-bisphenol-A epoxy resins. It can induce both allergic contact dermatitis and immunologic contact urticaria. It is structurally close to methyltetrahydrophthalic anhydride, which can also cause sensitization.

Check Digit Verification of cas no

The CAS Registry Mumber 19438-60-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,4,3 and 8 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 19438-60:
(7*1)+(6*9)+(5*4)+(4*3)+(3*8)+(2*6)+(1*0)=129
129 % 10 = 9
So 19438-60-9 is a valid CAS Registry Number.
InChI:InChI=1S/C9H12O3/c1-5-2-3-6-7(4-5)9(11)12-8(6)10/h5-7H,2-4H2,1H3

19438-60-9 Well-known Company Product Price

  • Brand
  • (Code)Product description
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  • Alfa Aesar

  • (B23328)  4-Methyl-1,2-cyclohexanedicarboxylic anhydride, mixture of isomers, 98%   

  • 19438-60-9

  • 100g

  • 400.0CNY

  • Detail

  • Alfa Aesar

  • (B23328)  4-Methyl-1,2-cyclohexanedicarboxylic anhydride, mixture of isomers, 98%   

  • 19438-60-9

  • 500g

  • 1035.0CNY

  • Detail

  • Sigma-Aldrich

  • (08483)  Hexahydro-4-methylphthalicanhydride,mixtureofcisandtrans  analytical reference material

  • 19438-60-9

  • 08483-100MG

  • 553.41CNY

  • Detail

  • Aldrich

  • (149934)  Hexahydro-4-methylphthalicanhydride,mixtureofcisandtrans  96%

  • 19438-60-9

  • 149934-25G

  • 470.34CNY

  • Detail

  • Aldrich

  • (149934)  Hexahydro-4-methylphthalicanhydride,mixtureofcisandtrans  96%

  • 19438-60-9

  • 149934-500G

  • 810.81CNY

  • Detail

  • Aldrich

  • (149934)  Hexahydro-4-methylphthalicanhydride,mixtureofcisandtrans  96%

  • 19438-60-9

  • 149934-3KG

  • 7,189.65CNY

  • Detail

19438-60-9SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017

1.Identification

1.1 GHS Product identifier

Product name 5-methyl-3a,4,5,6,7,7a-hexahydro-2-benzofuran-1,3-dione

1.2 Other means of identification

Product number -
Other names 5-Methyl hexahydro-1,3-isobenzofurandione

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:19438-60-9 SDS

19438-60-9Related news

DABCO- and DBU-intercalated α-zirconium phosphate as latent thermal catalysts in the copolymerization of glycidyl phenyl ether (GPE) and Hexahydro-4-methylphthalic anhydride (cas 19438-60-9) (MHHPA)08/17/2019

The latent catalytic abilities of tertiary amines-intercalated α-zirconium phosphate [(α-ZrP·amine): 1,4-diazabicyclo[2,2,2]octane (α-ZrP·DABCO) and 1,8-diazabicyclo[5,4,0]undec-7-ene (α-ZrP·DBU)] were examined by copolymerization of glycidyl phenyl ether (GPE) and hexahydro-4-methylphtha...detailed

19438-60-9Relevant articles and documents

CATALYTIC CONVERSIONS OF METHYLTETRAHYDROPHTHALIC ANHYDRIDE.

Lezdin,Dokuchaeva,Sibarov,Panfilova,Proskuryakov

, p. 136 - 138 (2007/10/21)

Methyltetrahydrophthalic anhydride (MTHPA) and mixtures of its isomers are among the widely used intermediates for production of polyester and epoxy resins. Information on methods of production of MHHPA and MPA (methylpthalic anhydride) is confined to a few patents. The possibility of obtaining them from MTHPA by hydrogenation and dehydrogenation respectively is of interest. Experimental evidence shows that alumina-palladium catalyst with a palladium content of 5. 0 mass % has the highest activity and selectivity in synthesis of 4-MPA. The yield of 4-MPA under the optimal conditions found is 60-61% on the converted feed, with 100% conversion. Alumina-palladium catalyst with a palladium content of 3. 0 mass % has the highest activity and selectivity in synthesis of 4-MHHPA. Under the optimal conditions found the yield of 4-MHHPA is 75-80% on the converted feed, with 100% conversion.

CLAISEN-REARRANGEMENT-MEDIATED RING CONTRACTION OF MACROCYCLIC LACTONES A NEW APPROACH TO CARBOCYCLES AND HETEROCYCLES

Funk, Raymond L.,Abelman, Matthew, M.,Munger, John D.

, p. 2831 - 2846 (2007/10/02)

Macrocyclic ketene acetals 3 undergo Claisen rearrangements smoothly and constitute a viable and general approach to hetero- or carbocyclic ring systems 4.This novel ring contraction process is subject to high internal asymmetric induction (cf. lactones 7 -> carbocycles 8) as well as relative asymmetric induction in the rearrangements of ketene acetals derived from lactones 18, 23 and 27.Finally, N-benzoylmeroquinene methyl ester (37) was prepared to demonstrate the potential of this methodology in heterocycle synthesis.

CONVERSION OF cis-4-METHYL-1,2,3,6-TETRAHYDROPHTHALIC ANHYDRIDE ON METALLIC CATALYSTS.

Dokuchaeva,Lezdin,Libarov,Paduto

, p. 1894 - 1900 (2007/10/02)

The hydrogenating and dehydrogenating properties of platinum, palladium, and nickel deposited on alumina were studied in the vapor-phase conversion of cis-4-methyl-1,2,3,6-tetrahydrophthalic anhydride in a flow-type apparatus. Conversion of 4-MTHPA on platinum and palladium proceeds virtually without destruction of the original molecule. The alumina-palladium catalyst with a palladium content of 2. 0 mass % has the highest activity and selectivity. The yield of 4-MHHPA and 4-MPA at 300 degree is 94. 5% on the converted feed, with 94. 8% conversion. Alumina-nickel catalysts exhibit mainly isomerization and dehydrogenation activity. Increase of the content of the active component in the catalyst intensifies its dehydrogenating action. Introduction of alkaline additives weakens the dehydrogenating and cracking functions.

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