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2,5-dimethylisophthalic acid is an organic compound with the chemical formula C10H10O4. It is a white crystalline solid that is derived from isophthalic acid by the addition of two methyl groups at the 2nd and 5th carbon positions. 2,5-dimethylisophthalic acid is an important intermediate in the production of various polymers and resins, such as polyamides, polyesters, and polyimides. It is also used in the synthesis of dyes, pharmaceuticals, and other specialty chemicals. The compound is known for its high melting point, good thermal stability, and excellent chemical resistance, making it a valuable building block in the chemical industry.

4919-45-3

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4919-45-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4919-45-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,9,1 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 4919-45:
(6*4)+(5*9)+(4*1)+(3*9)+(2*4)+(1*5)=113
113 % 10 = 3
So 4919-45-3 is a valid CAS Registry Number.

4919-45-3Relevant academic research and scientific papers

Inclusion complex containing epoxy resin composition for semiconductor encapsulation

-

, (2014/03/21)

The invention is an epoxy resin composition for sealing a semiconductor, including (A) an epoxy resin and (B) a clathrate complex. The clathrate complex is one of (b1) an aromatic carboxylic acid compound, and (b2) at least one imidazole compound represented by formula (II): wherein R2 represents a hydrogen atom, C1-C10 alkyl group, phenyl group, benzyl group or cyanoethyl group, and R3 to R5 represent a hydrogen atom, nitro group, halogen atom, C1-C20 alkyl group, phenyl group, benzyl group, hydroxymethyl group or C1-C20 acyl group. The composition has improved storage stability, retains flowability when sealing, and achieves an effective curing rate applicable for sealing delicate semiconductors.

PHOTODIMERIZATION OF BENZENES IN STRAINED DIHETERAMETACYCLOPHANES

Higuchi, Hiroyuki,Kobayashi, Eiji,Sakata, Yoshiteru,Misumi, Soichi

, p. 1731 - 1740 (2007/10/02)

Double- to quadruple-layered diheterametacyclophanes containing O, S, and Se atoms in the bridge chains were synthesized by the usual methods.On irradiation, three quadruple-layered cyclophanes 1a-c undergo a photodimerization of two inner benzenes t

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