List of compounds with carbon number 2
# List of compounds with carbon number 2

This is a partial list of molecules that contain 2 carbon atoms.

| Chemical formula | Synonyms | CAS number |
| - | - | - |
| $C_2Al$ | monoaluminum dicarbide | 37297-57-7 |
| $C_2Al_2$ | dialuminum dicarbide | 12122-01-9 |
| $C_2B$ | boron dicarbide | 12539-98-9 |
| $C_2Be$ | beryllium dicarbide | 12070-28-9 |
| $C_2BrCl$ | bromochloroacetylene | 25604-70-0 |
| $C_2BrClF_2O$ | bromodifluoroacetylchloride | 3832-48-2 |
| $C_2BrCl_5$ | bromopentachloroethane | 79504-02-2 |
| $C_2BrF_5$ | bromopentafluoroethane | 354-55-2 |
| $C_2Br_2FN$ | dibromo fluoroacetonitrile | 6698-74-4 |
| $C_2Br_2N_2O_2$ | dibromofuroxan | 70134-71-3 |
| $C_2Br_2O_2$ | oxalyl bromide | 15219-34-8 |
| $C_2Br_6$ | hexabromoethane | 594-73-0 |
| $C_2Ca$ | calcium carbide | 75-20-7 |
| $C_2Ce$ | cerium dicarbide | 12012-32-7 |
| $C_2CeRh$ | cerium rhodium dicarbide | 53262-56-9 |
| $C_2Cl_2F_2$ | dichlorodifluoroethylene | 27156-03-2 |
| $C_2Cl_2O_2$ | oxalyl chloride | 79-37-8 |
| $C_2Cl_3N$ | trichloroacetonitrile | 108-77-0 |
| $C_2Cl_4$ | tetrachloroethylene | 127-18-4 |
| $C_2Cl_4O$ | trichloroacetyl chloride | 76-02-8 |
| $C_2Cl_4O_2$ | trichloromethyl chloroformate | 503-38-8 |
| $C_2Cl_5F$ | pentachlorofluoroethane | 354-56-3 |
| $C_2CoNO_3$ | cobalt dicarbonyl nitrosyl | 61332-94-3 |
| $C_2Dy$ | dysprosium dicarbide | 12175-80-3 |
| $C_2Er$ | erbium dicarbide | 12192-37-9 |
| $C_2Eu$ | europium dicarbide | 12127-44-5 |
| $C_2FN_5O_{10}$ | fluoropentanitroethane | 23072-51-7 |
| $C_2F_2O_2$ | oxalyl fluoride | 359-40-0 |
| $C_2F_3$ | trifluorovinyl radical | 4605-17-8 |
| $C_2F_3I$ | iodotrifluoroethylene | 359-37-5 |
| $C_2F_3N$ | trifluoromethylisocyanide | 105879-13-8 |
| $C_2F_5$ | pentafluoro ethyl radical | 3369-48-0 |
| $C_2F_5I$ | pentafluoroethyliodide | 354-64-3 |
| $C_2F_6O_5S_2$ | trifluoromethanesulfonic anhydride | 358-23-6 |
| $C_2F_7N$ | perfluoroethanamine | 354-80-3 |
| $C_2H$ | ethynyl radical | 2122-48-7 |
| $C_2HBrClF_3$ | halothane | 151-67-7 |
| $C_2HBrO$ | bromoketene | 78957-22-9 |
| $C_2HBr_2FO_2$ | dibromofluoroacetic acid | 353-99-1 |
| $C_2HBr_3$ | tribromoethene | 598-16-3 |
| $C_2HBr_3O_2$ | tribromoacetic acid | 75-96-7 |
| $C_2HClO$ | chloroketene | 29804-89-5 |
| $C_2HCl_3$ | trichloroethylene | 79-01-6 |
| $C_2HCl_3O$ | chloral | 75-87-6 |
| $C_2HF_3OS$ | trifluorothiolacetic acid | 2925-25-9 |
| $C_2HF_5O$ | pentafluorodimethyl ether | 3822-68-2 |
| $C_2HNO$ | formyl cyanide | 4471-47-0 |
| $C_2HO$ | ethynyloxy radical | 51095-15-9 |
| $C_2H_2$ | acetylene | 74-86-2 |
| $C_2H_2AsCl_3$ | lewisite | 541-25-3 |
| $C_2H_2BrClO$ | bromoacetyl chloride | 22118-09-8 |
| $C_2H_2Br_2O$ | bromoacetyl bromide | 598-21-0 |
| $C_2H_2Br_2O_2$ | dibromoethanoic acid | 631-64-1 |
| $C_2H_2Cl_2$ | dichloromethane | |
| $C_2H_2ClF_2NO$ | chlorodifluoroacetamide | 354-28-9 |
| $C_2H_2ClNS$ | chloromethyl thiocyanate | 3268-79-9 |
| $C_2H_2Cl_2O$ | dichloroacetaldehyde | 79-02-7 |
| $C_2H_2FN$ | fluoroacetonitrile | 503-20-8 |
| $C_2H_2F_2O_2$ | difluoroacetic acid | 381-73-7 |
| $C_2H_2IN$ | iodoacetonitrile | 624-75-9 |
| $C_2H_2N$ | cyanomethyl radical | 2932-82-3 |
| $C_2H_2O$ | ethynol | 32038-79-2 |
| $C_2H_2O$ | ketene | 463-51-4 |
| $C_2H_2O$ | oxirene | 157-18-6 |
| $C_2H_2OS$ | ethynesulfenic acid | 121564-25-8 |
| $C_2H_2O_2$ | glyoxal | 107-22-2 |
| $C_2H_2O_3$ | formic acid anhydride | 1558-67-4 |
| $C_2H_2O_4$ | oxalic acid | 144-62-7 |
| $C_2H_2O_8Pb_3$ | basic lead carbonate | 1319-46-6 |
| $C_2H_2S$ | thioketene | 18282-77-4 |
| $C_2H_2Se$ | selenoketene | 61134-37-0 |
| $C_2H_3$ | vinyl radical | 2669-89-8 |
| $C_2H_3BF_2$ | vinyldifluoroborane | 358-95-2 |
| $C_2H_3BrO$ | acetyl bromide | 506-96-7 |
| $C_2H_3Br_3O_2$ | bromal hydrate | 507-42-6 |
| $C_2H_3Cl$ | methylchlorocarbene | 31304-51-5 |
| $C_2H_3ClO$ | acetyl chloride | 75-36-5 |
| $C_2H_3ClO_2S$ | methoxycarbonylsulfenyl chloride | 26555-40-8 |
| $C_2H_3Cl_3O_2$ | chloral hydrate | 302-17-0 |
| $C_2H_3FO$ | acetyl fluoride | 557-99-3 |
| $C_2H_3F_2NO$ | difluoroacetamide | 359-38-6 |
| $C_2H_3F_3O_2Si$ | silyl trifluoroacetate | 6876-44-4 |
| $C_2H_3F_3S_2$ | methyl trifluoromethyl disulfide | 14410-21-0 |
| $C_2H_3IO$ | acetyl iodide | 507-02-8 |
| $C_2H_3KO_2$ | potassium acetate | 127-08-2 |
| $C_2H_3N$ | acetonitrile | 75-05-8 |
| $C_2H_3NO$ | methylcyanate | 1768-34-9 |
| $C_2H_3NO$ | nitrosoethylene | 54680-52-3 |
| $C_2H_3NO_2$ | nitroethene | 500016-67-1 |
| $C_2H_3NO_2$ | nitroethylene | 3638-64-0 |
| $C_2H_3NO_3$ | oxamic acid | 471-47-6 |
| $C_2H_3NO_4$ | acetyl nitrate | 591-09-3 |
| $C_2H_3NSe$ | methyl isoselenocyanate | 4426-70-4 |
| $C_2H_3NSe$ | methyl selenocyanate | 2179-80-8 |
| $C_2H_3NaO_2$ | sodium ethanoate | 127-09-3 |
| $C_2H_3O$ | acetyl radical | 3170-69-2 |
| $C_2H_3O$ | oxiranyl radical | 31586-84-2 |
| $C_2H_3O$ | vinyloxy radical | 6912-06-7 |
| $C_2H_3O_2Tl$ | thallium acetate | 563-68-8 |
| $C_2H_4$ | ethylene | 74-85-1 |
| $C_2H_4ClO_2P$ | ethylene chlorophosphite | 822-39-9 |
| $C_2H_4Cl_2$ | dichloroethane | 1300-21-6 |
| $C_2H_4F_2O$ | difluoroethanol | 359-13-7 |
| $C_2H_4N_2O_2$ | oxalamide | 471-46-5 |
| $C_2H_4N_2O_4$ | dihydroxyglyoxime | 1687-60-1 |
| $C_2H_4N_2S_2$ | ethanedithioamide | 79-40-3 |
| $C_2H_4N_4$ | dicyanodiamide | 461-58-5 |
| $C_2H_4N_4O_2$ | diazenedicarboxamide | 123-77-3 |
| $C_2H_4O$ | acetaldehyde | 75-07-0 |
| $C_2H_4O$ | ethenol | 557-75-5 |
| $C_2H_4O$ | ethylene oxide | 75-21-8 |
| $C_2H_4OS$ | ethanethioic acid | 507-09-5 |
| $C_2H_4OS$ | ethenesulfenic acid | 2492-74-2 |
| $C_2H_4O_2$ | acetic acid | 64-19-7 |
| $C_2H_4O_2$ | 1,2-dioxetane | 6788-84-7 |
| $C_2H_4O_2$ | formaldehyde dimer | 61233-19-0 |
| $C_2H_4O_2$ | methyl formate | 107-31-3 |
| $C_2H_4O_2$ | glycolaldehyde | 141-46-8 |
| $C_2H_4O_3$ | ethaneperoxoic acid | 79-21-0 |
| $C_2H_4O_3$ | monomethyl carbonate | 7456-87-3 |
| $C_2H_4O_4$ | formic acid dimer | 14523-98-9 |
| $C_2H_4S$ | thiirane | 420-12-2 |
| $C_2H_4S$ | thioacetaldehyde | 6851-93-0 |
| $C_2H_4Se$ | selenoacetaldehyde | 67281-48-5 |
| $C_2H_4Se_3$ | triselenothane | 121400-83-7 |
| $C_2H_5$ | ethyl radical | 2025-56-1 |
| $C_2H_5BCl_2$ | ethyldichloroborane | 1739-53-3 |
| $C_2H_5BF_2$ | ethylidifluoroborane | 430-41-1 |
| $C_2H_5BrHg$ | ethylmercuric bromide | 107-26-6 |
| $C_2H_6Hg$ | dimethylmercury | 593-74-8 |
| $C_2H_5BrO$ | bromomethyl methyl ether | 13057-17-5 |
| $C_2H_5Cl$ | ethyl chloride | 75-00-3 |
| $C_2H_5ClN_2O$ | chloroacetyl hydrazine | 30956-28-6 |
| $C_2H_5ClO$ | ethyl hypochlorite | 624-85-1 |
| $C_2H_5ClO_2S$ | ethanesulfonyl chloride | 594-44-5 |
| $C_2H_5ClS$ | chloromethylmethyl sulfide | 2373-51-5 |
| $C_2H_5Cl_2O_2P$ | ethyl dichlorophosphate | 1498-51-7 |
| $C_2H_5Cl_2P$ | ethyldichlorophosphine | 1498-40-4 |
| $C_2H_5Cl_2PSe$ | ethylphosphonoselenoic dichloride | 14705-46-5 |
| $C_2H_5Cl_3Si$ | ethyltrichlorosilane | 115-21-9 |
| $C_2H_5FO$ | methoxymethyl fluoride | 460-22-0 |
| $C_2H_5FO_2S$ | ethane sulfonyl fluoride | 754-03-0 |
| $C_2H_5HgI$ | ethylmercuric iodide | 2440-42-8 |
| $C_2H_5I$ | iodoethane | 75-03-6 |
| $C_2H_5IO$ | iodomethyl methyl ether | 13057-19-7 |
| $C_2H_5IS$ | iodomethyl methyl sulfide | 43034-68-0 |
| $C_2H_5Li$ | ethyl lithium | 811-49-4 |
| $C_2H_5N$ | acetaldimine | 20729-41-3 |
| $C_2H_5N$ | ethenamine | 593-67-9 |
| $C_2H_5N$ | ethylenimine | 151-56-4 |
| $C_2H_5NO$ | acetaldoxime | 107-29-9 |
| $C_2H_5NO$ | acetamide | 60-35-5 |
| $C_2H_5NO$ | nitrosoethane | 925-91-7 |
| $C_2H_5NOS$ | aminothioacetic acid | 758-10-1 |
| $C_2H_5NO_2$ | glycine | 56-40-6 |
| $C_2H_5NO_2$ | glycolamide | 598-42-5 |
| $C_2H_5NO_2S$ | vinylsulfonamide | 2386-58-5 |
| $C_2H_5NO_4$ | ammonium acid oxalate | 5972-72-5 |
| $C_2H_5NS$ | ethanethioamide | 62-55-5 |
| $C_2H_5N_3O_2$ | imidodicarbonic diamide | 108-19-0 |
| $C_2H_5O$ | ethoxy radical | 2154-50-9 |
| $C_2H_5P$ | phosphirane | 6569-82-0 |
| $C_2H_5P$ | vinyl phosphine | 58436-39-8 |
| $C_2H_5PS_2$ | phosphenodithioic ethane | 41391-49-5 |
| $C_2H_5S$ | methylthiomethyl radical | 31533-72-9 |
| $C_2H_6$ | ethane | 74-84-0 |
| $C_2H_6AlCl$ | dimethylaluminum chloride | 1184-58-3 |
| $C_2H_6AsBr$ | dimethylarsine bromide | 676-71-1 |
| $C_2H_6AsCl$ | chlorodimethylarsine | 557-89-1 |
| $C_2H_6BBr$ | dimethylboron bromide | 5158-50-9 |
| $C_2H_6BCl$ | chlorodimethylborane | 1803-36-7 |
| $C_2H_6BClFN$ | dimethylaminofluorochloroborane | 38481-07-1 |
| $C_2H_6BClO_2$ | chlorodimethoxyborane | 868-81-5 |
| $C_2H_6BFO_2$ | fluorodimethoxyborane | 367-46-4 |
| $C_2H_6Be$ | dimethylberyllium | 506-63-8 |
| $C_2H_6ClOP$ | dimethylphosphinic chloride | 1111-92-8 |
| $C_2H_6ClO_2P$ | dimethylchlorophosphite | 3743-07-5 |
| $C_2H_6ClPS$ | dimethylphosphinothioic chloride | 993-12-4 |
| $C_2H_6Cl_2Ge$ | dimethylgermanium dichloride | 1529-48-2 |
| $C_2H_6Cl_2Si$ | ethyldichlorosilane | 1789-58-8 |
| $C_2H_6FO_2P$ | methyl methylphosphonofluoridate | 353-88-8 |
| $C_2H_6FP$ | dimethyl fluorophosphine | 507-15-3 |
| $C_2H_6F_3NS$ | dimethylaminosulfur trifluoride | 3880-03-3 |
| $C_2H_6GeO$ | dimethylgermanone | 5061-27-8 |
| $C_2H_6GeS$ | dimethylgermathione | 16090-49-6 |
| $C_2H_6N$ | dimethyl amidogen | 15337-44-7 |
| $C_2H_6N_2O_2$ | ethylnitramine | 19091-98-6 |
| $C_2H_6N_2O_4$ | hydrazinium hydrogen oxalate | 20321-02-2 |
| $C_2H_6O$ | dimethyl ether | 115-10-6 |
| $C_2H_6O$ | ethanol | 64-17-5 |
| $C_2H_6OS$ | dimethyl sulfoxide | 67-68-5 |
| $C_2H_6OS_2$ | methyl methanethiosulfinate | 13882-12-7 |
| $C_2H_6O_2$ | ethyl hydroperoxide | 3031-74-1 |
| $C_2H_6O_2$ | ethylene glycol | 107-21-1 |
| $C_2H_6O_2S$ | dimethyl sulfone | 67-71-0 |
| $C_2H_6O_2S_2$ | methyl methanethiosulfonate | 2949-92-0 |
| $C_2H_6O_4$ | dioxybismethanol | 17088-73-2 |
| $C_2H_6O_5S_2$ | methanesulfonic anhydride | 7143-01-3 |
| $C_2H_6S$ | dimethyl sulfide | 75-18-3 |
| $C_2H_6S$ | ethanethiol | 75-08-1 |
| $C_2H_6S_5$ | dimethyl pentasulfide | 7330-31-6 |
| $C_2H_6Se$ | dimethyl selenide | 593-79-3 |
| $C_2H_6Se_2$ | dimethyl diselenide | 7101-31-7 |
| $C_2H_6Si_2$ | disilyl acetylene | 1070-76-4 |
| $C_2H_6Sn$ | dimethylstannylene radical | 23120-99-2 |
| $C_2H_6Te$ | dimethyltelluride | 593-80-6 |
| $C_2H_6Zn$ | dimethylzinc | 544-97-8 |
| $C_2H_7As$ | dimethylarsine | 593-57-7 |
| $C_2H_7AsO_3$ | ethylarsonic acid | 507-32-4 |
| $C_2H_7BF_3N$ | dimethylaminetrifluoroborane | 811-59-6 |
| $C_2H_7BO_2$ | ethyldihydroxyborane | 4433-63-0 |
| $C_2H_7ClO$ | dimethyl ether hydrogen chloride complex | 24521-77-5 |
| $C_2H_7N$ | ethylamine | 75-04-7 |
| $C_2H_7NO$ | acetaldehyde ammonia trimer | 75-39-8 |
| $C_2H_7NO$ | ethanolamine | 141-43-5 |
| $C_2H_7NO_2S$ | ethanesulfonamide | 1520-70-3 |
| $C_2H_7NO_3S$ | taurine | 91105-79-2 |
| $C_2H_7NO_4S_2$ | dimethane sulfonamide | 5347-82-0 |
| $C_2H_7NS$ | mercaptamine | 60-23-1 |
| $C_2H_7O_3P$ | ethylphosphonic acid | 15845-66-6 |
| $C_2H_8BF_4N$ | dimethylammonium tetrafluoroborate | 16970-97-1 |
| $C_2H_8BrN$ | ethylammoniumbromide | 593-55-5 |
| $C_2H_8N_2$ | ethylenediamine | 107-15-3 |
| $C_2H_8N_2O_4$ | ammonium oxalate | 1113-38-8 |
| $C_2H_8O_2Si$ | dimethoxysilane | 5314-52-3 |
| $C_2H_9N_2O_3$ | ethylammonium nitrate | 22113-86-6 |
| $C_2H_{10}N_2O_8S_2Fe$ | ferrous ethylenediammonium sulfate | 63589-59-3 |
| $C_2H_{12}CdTe$ | dimethylcadmium·dimethyltellurium | 143481-66-7 |
| $C_2H_{12}N_6O_4S$ | guanidine sulfate | 594-14-9 |
| $C_2HgN_2S_2$ | mercuric thiocyanate | 592-85-8 |
| $C_2Ho$ | holmium dicarbide | 12071-14-6 |
| $C_2K_2N_2$ | potassium cyanide dimer | 55186-08-8 |
| $C_2La$ | lanthanum dicarbide | 12071-15-7 |
| $C_2Li_2$ | lithium carbide | 1070-75-3 |
| $C_2Lu$ | lutetium dicarbide | 12175-89-2 |
| $C_2Mg$ | magnesium carbide | 12122-46-2 |
| $C_2N_2$ | bisisocyanide | 78800-21-2 |
| $C_2N_2$ | cyanogen | 460-19-5 |
| $C_2N_2Na_2$ | sodium cyanide | 55186-09-9 |
| $C_2N_2O$ | cyanogen isocyanate | 22430-66-6 |
| $C_2N_2S$ | cyanogen isothiocyanate | 56023-03-1 |
| $C_2N_2S$ | sulfur dicyanide | 627-52-1 |
| $C_2N_2S_2$ | thiocyanogen | 505-14-6 |
| $C_2N_2Se$ | selenium cyanide | 2180-01-0 |
| $C_2N_4O_6$ | trinitroacetonitrile | 630-72-8 |
| $C_2N_6O_{12}$ | hexanitroethane | 918-37-6 |
| $C_2Na_2$ | Sodium carbide | 2881-62-1 |
| $C_2Na_2O_4$ | sodium oxalate | 62-76-0 |
| $C_2Nd$ | neodymium dicarbide | 12071-21-5 |
| $C_2O$ | dicarbon monoxide | 12071-23-7 |
| $C_2P$ | dicarbon phosphide | 12602-39-0 |
| $C_2Rh$ | rhodium dicarbide | 37306-47-1 |
| $C_2Sc$ | scandium dicarbide | 12175-91-6 |
| $C_2Si$ | silicon dicarbide | 12071-27-1 |
| $C_2Si_2$ | disiladicarbide | 12144-09-1 |
| $C_2Th$ | thorium dicarbide | 12071-31-7 |
| $C_2Ti$ | titanium dicarbide | 12071-32-8 |
| $C_2U$ | uranium dicarbide | 12071-33-9 |
| $C_2V$ | vanadium dicarbide | 12542-39-1 |
| $C_2Y$ | yttrium dicarbide | 12071-35-1 |
| $C_2Zr$ | zirconium dicarbide | 12340-54-4 |
