also: フォルマリン
noun
formalin
Aqueous solution of formaldehyde, used as a disinfectant and preservative in chemistry and biology.
生物の標本をホルマリンに保存する。
Preserve biological specimens in formalin.
Most common katakana spelling for formalin.
Alternate katakana spelling, reflecting the English pronunciation more closely.
Formaldehyde is the pure chemical compound, while formalin is its aqueous solution.
Borrowed from English 'formalin', a trademark name for a formaldehyde solution.