methanaln.

Brit.

/ˈmɛθənal/, U.S.

/ˈmɛθəˌnæl/

Origin: Formed within English, by derivation. Etymons: methane n., -al suffix².

Etymology: < methane n. + -al suffix².

Chemistry.

Formaldehyde, CH₂O.The systematic name according to IUPAC rules.

ΘΚΠ

the world > matter > chemistry > organic chemistry > aldehydes or alkanals > [noun] > formaldehyde

formaldehyde1872

methanal1894

1894 G. M'Gowan tr. A. Bernthsen Text-bk. Org. Chem. (ed. 2) v. 146 Formic Aldehyde (Methanal)... This may also be regarded as the oxide of the diatomic radicle methylene.

1967 Tetrahedron 23 1029 In the previous paper the computed properties of methyl cation using EHT theory were compared with two model systems: methanal and borane.

1983 R. O. C. Norman & D. J. Waddington Mod. Org. Chem. (ed. 4) xii. 171 Methanal is a gas, other aldehydes and ketones of relatively low formula weight are liquids and the remainder are solids.

1998 Jrnl. Biol. Educ. 32 201 Standard practice has been to use a chemical irritant to bring earthworms to the surface, but the use of the most effective chemical, methanal (formalin), is restricted by COSHH regulations.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	methanal
释义	methanaln. Brit. /ˈmɛθənal/, U.S. /ˈmɛθəˌnæl/ Origin: Formed within English, by derivation. Etymons: methane n., -al suffix². Etymology: < methane n. + -al suffix². Chemistry. Formaldehyde, CH₂O.The systematic name according to IUPAC rules. ΘΚΠ the world > matter > chemistry > organic chemistry > aldehydes or alkanals > [noun] > formaldehyde formaldehyde1872 methanal1894 1894 G. M'Gowan tr. A. Bernthsen Text-bk. Org. Chem. (ed. 2) v. 146 Formic Aldehyde (Methanal)... This may also be regarded as the oxide of the diatomic radicle methylene. 1967 Tetrahedron 23 1029 In the previous paper the computed properties of methyl cation using EHT theory were compared with two model systems: methanal and borane. 1983 R. O. C. Norman & D. J. Waddington Mod. Org. Chem. (ed. 4) xii. 171 Methanal is a gas, other aldehydes and ketones of relatively low formula weight are liquids and the remainder are solids. 1998 Jrnl. Biol. Educ. 32 201 Standard practice has been to use a chemical irritant to bring earthworms to the surface, but the use of the most effective chemical, methanal (formalin), is restricted by COSHH regulations. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1894
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