Mei, Zhen-Hua et al. published their research in Asian Journal of Chemistry in 2009 | CAS: 1877-75-4

2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.COA of Formula: C9H10O4

Synthesis and liquid-crystalline properties of novel compounds with 3-fluoro-4-cyanophenoxy group was written by Mei, Zhen-Hua;You, Ting-Ting;Bi, Sai. And the article was included in Asian Journal of Chemistry in 2009.COA of Formula: C9H10O4 This article mentions the following:

Facile and convenient synthesis of four series of novel compounds with 3-fluoro-4-cyanophenoxy group were performed by using 2-fluoro-4-hydroxyphenyl as intermediate. The structures of these compounds were characterized by means of elemental anal., IR, NMR (1H NMR), and mass spectra (MS). One of these compounds was found to exhibit potential liquid-crystalline properties. In the experiment, the researchers used many compounds, for example, 2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4COA of Formula: C9H10O4).

2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.COA of Formula: C9H10O4

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem