Sabater, Paula Querol team published research in Journal of Analytical Chemistry in 2021 | 111-90-0

Product Details of C6H14O3, Diethylene glycol monoethyl ether appears as a colorless, slightly viscous liquid with a mild pleasant odor. Flash point near 190°F. Used to make soaps, dyes, and other chemicals.
Diethylene glycol monoethyl ether is a primary alcohol that is ethanol substituted by a 2-ethoxyethoxy group at position 2. It has a role as a protic solvent. It is a diether, a primary alcohol and a hydroxypolyether. It derives from a diethylene glycol., 111-90-0.

Ethers are a class of organic compounds that contain an ether group—an oxygen atom connected to two alkyl or aryl groups. 111-90-0, formula is C6H14O3, Name is Diethylene Glycol Monoethyl Ether.They have the general formula R–O–R′, where R and R′ represent the alkyl or aryl groups. Product Details of C6H14O3.

Sabater, Paula Querol;Santana, Oscar Diaz;Moreno, Daura Vega research published 《 Determining Intersecting Ball-Point Ink Strokes with Different Aging》, the research content is summarized as follows. Abstract: The order of laying down homogeneous intersecting strokes of ball-point inks has been assessed using a range of different spectroscopic and anal. techniques for recent inks and for inks with a time difference of 4 years. These techniques are IR reflectance photog. with luminescence, fluorescence micro-spectrophotometry, Fourier transform IR spectrometry, high resolution liquid chromatog. and gas chromatog. with mass spectrometry. This paper presents a combined method applicable to forensic cases aimed at resolving homogenous intersecting strokes of ball-point ink to determine whether they were made at the same time or, on the contrary, they were intersecting strokes laid down with an acute time difference, taking four years as an age reference

Product Details of C6H14O3, Diethylene glycol monoethyl ether appears as a colorless, slightly viscous liquid with a mild pleasant odor. Flash point near 190°F. Used to make soaps, dyes, and other chemicals.
Diethylene glycol monoethyl ether is a primary alcohol that is ethanol substituted by a 2-ethoxyethoxy group at position 2. It has a role as a protic solvent. It is a diether, a primary alcohol and a hydroxypolyether. It derives from a diethylene glycol., 111-90-0.

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