19438-60-9 Usage
Description
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.
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
19438-60-9Relevant articles and documents
PREPARATION OF A LIQUID CURING AGENT FOR EPOXY COMPOSITES OF ISOMETHYLTETRAHYDROPHTHALIC ANHYDRIDE
Dokuchaeva, T. G.,Sibarov, D. A.,Lezdin, S. Yu.,Silin, A. A.
, p. 2605 - 2608 (2007/10/02)
-
PREPARATION OF METHYLPHTHALIC ANHYDRIDE BY DEHYDROHYDROGENATION
Lezdin, S. Yu.,Sibarov, D. A.,Dokuchaeva, T. G.,Proskuryakov, V. A.
, p. 2278 - 2281 (2007/10/02)
-
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.
