Methylene Glycol is a chemical compound, member of the class of methanediols.

Chemical name methanediol

Molecular Formula CH4O2

Significant substances present or used in the production method:


Safety
Methylene glycol and formaldehyde are chemically different molecules, but there is a close correlation between these two compounds: they rapidly convert into glycol in aqueous solution and have rapid conversion to each other. Formaldehyde is a natural product in the environment and in living systems, but prolonged exposure can lead to irritation, especially to the eyes and nose.
https://ec.europa.eu/health/scientific_committees/consumer_safety/docs/sccs_o_097.pdf

What it is used for and where
Cosmetics
Nail Conditioning agent. It is an agent that creates protection against harmful or chemical substances by strengthening the nail structure against external elements and can repair any chipping, cracking or brittle nails. It helps keep the nail's outer layer and keratin protein in good condition. It can also prevent cracking and peeling of the nail.

Nail sculpting. This ingredient is used in the extension and modification of the natural nail.
Synonyms: EC number 207-339-5
UNII 6Z20YM9257
DTXSID50196801
Formaldehyde hydrate

CAS: 463-57-0