中信建投砸盘挫伤市场信心新三板业务涉及三大违规

????
Ball and stick model of methane	Spacefill model of methane
?????
	????????? ?????? ????????????? ??? Methane
	Systematic IUPAC name Carbane (never recommended)
	????? ????? Marsh Gas; Natural Gas; Carbon tetrahydride; Hydrogen carbide;
??????????????
???????? ??? ????????	74-82-8
??????	297
??????????	291
????? ????????	200-812-7
UN number	1971
MeSH	{{{MeSHName}}}
ChEMBL	CHEMBL17564
RTECS number	PA1490000
Beilstein Reference	1718732
Gmelin Reference	59
3DMet	{{{3DMet}}}
??????-?????? ?? ????	Image 1
	SMILES C ;
	InChI InChI=1S/CH4/h1H4 ; Key: VNWKTOKETHGBQD-UHFFFAOYSA-N ;
??????????
Chemical formula	CH4
Molar mass	????? g·mol?1
Appearance	Colorless gas
Odor	Odorless
Density	0.656 g/L (gas, 25 °C, 1 atm); 0.716 g/L (gas, 0 °C, 1 atm); 0.42262 g cm?3 ; (liquid, ?162 °C)
Melting point	?????? °C; ?????? °F; ???? K
Boiling point	??????? °C; ??????? °F; ?????? K
Solubility in water	22.7 mg L?1
Solubility	soluble in ethanol, diethyl ether, benzene, toluene, methanol, acetone
log P	1.09
Structure
Point group	Td
Molecular shape	Tetrahedron
Dipole moment	0 D
Thermochemistry
???????? ?????? (C)	35.69 J K?1 mol?1
Std molar; entropy (So298)	186.25 J K?1 mol?1
Std enthalpy of; formation (ΔfHo298)	?74.87 kJ mol?1
Std enthalpy of; combustion (ΔcHo298)	?891.1 to ?890.3 kJ mol?1
?????
NFPA 704	4 2
Flash point	???? °C (?????? °F; ???? K)
Autoignition; temperature	??? °C (??? °F; ??? K)
??????????? ??????	4.4–17%
Related compounds
Related alkanes	Methyl iodide; Difluoromethane; Iodoform; Carbon tetrachloride;
	????? ??? ??? ?????????? ?????? ???????? ?????????? ?????????? ?????????? ??????? ?????? ????????? ????? ??????? (?? °? [?? °?], 100 kPa). ???????? (?????? ?) ?????????? ??????????

??????:Chembox HenryConstant ??????:Chembox GHS (set)百度　　3月2日，农业部农机推广总站召开春节回乡调研座谈会，副站长涂志强主持会议。

???? ???? – ?????? ??????? CH4 ?????? ???? ???????????. ???????? ????? ??????. ???? ?? ?? ?????? ? ???????? ??????????.

??????

^ ^??? ^??? Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. pp. 3–4. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4. Methane is a retained name (see P-12.3) that is preferred to the systematic name 'carbane', a name never recommended to replace methane, but used to derive the names 'carbene' and 'carbyne' for the radicals H₂C^2? and HC^3?, respectively.
^ Gas Encyclopedia. ????????? ???? ???????? on 2025-08-04. ???????????November 7, 2013.
^ Safety Datasheet, Material Name: Methane (PDF). Metheson Tri-Gas Incorporated (December 4, 2009). ????????? ???? ???????? on 2025-08-04. ???????????December 4, 2011.
^ NOAA Office of Response and Restoration, US GOV. METHANE. noaa.gov.

[iupac2013-1] ??? ^??? Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. pp. 3–4. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4. Methane is a retained name (see P-12.3) that is preferred to the systematic name 'carbane', a name never recommended to replace methane, but used to derive the names 'carbene' and 'carbyne' for the radicals H₂C^2? and HC^3?, respectively.

[airliquide-2] Gas Encyclopedia. ????????? ???? ???????? on 2025-08-04. ???????????November 7, 2013.

[3] Safety Datasheet, Material Name: Methane (PDF). Metheson Tri-Gas Incorporated (December 4, 2009). ????????? ???? ???????? on 2025-08-04. ???????????December 4, 2011.

[4] NOAA Office of Response and Restoration, US GOV. METHANE. noaa.gov.

[?]

[?]

[?]

暗物质是什么	碎石后要注意些什么	咆哮是什么意思	衣原体感染是什么意思	情何以堪什么意思
为什么空调外机不转	歧途什么意思	见地是什么意思	子宫肌瘤做什么检查能查出来	什么是阴蒂
脸上长粉刺是什么原因	肚子经常疼是什么原因	强肉弱食是什么意思	海马萎缩是什么情况	精液的主要成分是什么
三观不合是什么意思	二氧化碳分压高说明什么	血小板低是什么原因引起的	毛主席的女儿为什么姓李	没有子宫有什么影响

3加2是什么意思hcv8jop1ns1r.cn	脾胃虚弱吃什么hcv7jop6ns6r.cn	苦夏什么意思hcv9jop7ns0r.cn	贵族是什么意思啊hcv9jop8ns1r.cn	一个火一个斤念什么hcv8jop9ns6r.cn
挣扎是什么意思hcv8jop3ns7r.cn	滑档是什么意思wzqsfys.com	一棵树是什么品牌gysmod.com	早期唐筛是检查什么hcv7jop6ns1r.cn	梦见亲人哭是什么征兆hcv9jop6ns2r.cn
谷朊粉是什么hcv8jop1ns3r.cn	p.a.是什么意思zsyouku.com	知了猴吃什么长大的hcv9jop2ns3r.cn	水痘挂什么科hcv8jop3ns7r.cn	梦到和男朋友分手是什么征兆hcv8jop5ns6r.cn
塑料袋是什么材质hcv9jop5ns9r.cn	澳门是什么时候被葡萄牙占领的hcv7jop7ns0r.cn	梦见死人复活是什么意思hcv9jop1ns3r.cn	宠物医院需要什么资质hcv8jop6ns1r.cn	circles是什么意思hcv9jop0ns0r.cn

中信建投砸盘挫伤市场信心 新三板业务涉及三大违规

??????

中信建投砸盘挫伤市场信心新三板业务涉及三大违规