# List of compounds with carbon number 4

This is a partial list of molecules that contain 4 carbon atoms.
| Chemical formula | Synonyms | CAS number |
| C$_4$Br$_2$ | dibromobutadiyne | 36333-41-2 |
| C$_4$Ce | cerium tetracarbide | 12151-79-0 |
| C$_4$ClF$_7$O | heptafluorobutyryl chloride | 375-16-6 |
| C$_4$Cl$_2$F$_4$O$_2$ | tetrafluorosuccinyl chloride | 356-15-0 |
| C$_4$Cl$_2$F$_4$O$_3$ | chlorodifluoroacetic anhydride | 2834-23-3 |
| C$_4$Cl$_2$O$_4$Rh$_2$ | dirhodium tetracarbonyl dichloride | 14523-22-9 |
| C$_4$Cl$_3$CoO$_4$Si | trichlorosilylcobalt tetracarbonyl | 14239-21-5 |
| C$_4$Cl$_4$O | perchlorocyclobutenone | 3200-96-2 |
| C$_4$CoF$_3$O$_4$Si | trifluorosilylcobalt tetracarbonyl | 15693-79-5 |
| C$_4$Dy | dysprosium tetracarbide | 12543-88-3 |
| C$_4$F$_4$O$_3$ | tetrafluorosuccinic anhydride | 699-30-9 |
| C$_4$F$_6$O | hexafluorocyclobutanone | 699-35-4 |
| C$_4$F$_8$ | octafluorocyclobutane | 115-25-3 |
| C$_4$F$_{10}$O$_2$S | nonafluorobutanesulfonyl fluoride | 375-72-4 |
| C$_4$FeI$_2$O$_4$ | iron tetracarbonyl diiodide | 14911-55-8 |
| C$_4$FeO$_4$ | iron tetracarbonyl | 15281-98-8 |
| C$_4$H$_2$Br$_2$O$_3$ | mucobromic acid | 488-11-9 |
| C$_4$H$_2$Br$_2$O$_3$ | mucobromic acid lactone | 766-38-1 |
| C$_4$H$_2$Cl$_2$O$_2$ | fumaryl chloride | 627-63-4 |
| C$_4$H$_2$Cl$_2$O$_3$ | mucochloric acid | 87-56-9 |
| C$_4$H$_2$Cl$_4$O$_3$ | dichloroacetic anhydride | 4124-30-5 |
| C$_4$H$_2$F$_4$O$_4$ | tetrafluorosuccinic acid | 377-38-8 |
| C$_4$H$_2$N$_2$ | fumaronitrile | 764-42-1 |
| C$_4$H$_2$N$_2$O$_4$ | alloxan | 50-71-5 |
| C$_4$H$_3$BrS | 2-bromothiophene | 1003-09-4 |
| C$_4$H$_3$ClN$_2$ | chloropyrazine | 14508-49-7 |
| C$_4$H$_3$Cl$_3$OS | methyl trichlorothioacrylate | 76619-91-5 |
| C$_4$H$_3$Cu | copper vinylacetylenide | 5256-77-9 |
| C$_4$H$_3$F$_3$O$_2$ | vinyl trifluoroacetate | 433-28-3 |
| C$_4$H$_3$F$_5$O$_2$ | pentafluoropropanoic acid methyl ester | 378-75-6 |
| C$_4$H$_3$F$_7$O | heptafluoropropyl methyl ether | 375-03-1 |
| C$_4$H$_3$F$_7$O | methyl perfluoroisopropyl ether | 22052-84-2 |
| C$_4$H$_3$F$_7$O | sevoflurane | 28523-86-6 |
| C$_4$H$_3$N | cyanoallene | 1001-56-5 |
| C$_4$H$_3$N$_3$O$_4$ | violuric acid | 87-39-8 |
| C$_4$H$_4$ | cyclobutadiene | 1120-53-2 |
| C$_4$H$_4$ | methylenecyclopropene | 4095-06-1 |
| C$_4$H$_4$ | Tetrahedrane | 157-39-1 |
| C$_4$H$_4$AsCl$_3$ | lewisite 2 | 40334-69-8 |
| C$_4$H$_4$Cl$_2$O$_2$ | butanedioyl dichloride | 543-20-4 |
| C$_4$H$_4$Cl$_2$O$_2$ | vinyl dichloro acetate | 7561-04-8 |
| C$_4$H$_4$N$_2$ | pyrazine | 290-37-9 |
| C$_4$H$_4$N$_2$ | pyridazine | 289-80-5 |
| C$_4$H$_4$N$_2$ | succinonitrile | 110-61-2 |
| C$_4$H$_4$N$_2$O$_2$ | acetylenedicarboxamide | 543-21-5 |
| C$_4$H$_4$N$_2$O$_2$ | maleic hydrazide | 123-33-1 |
| C$_4$H$_4$N$_2$O$_2$ | uracil | 66-22-8 |
| C$_4$H$_4$N$_2$O$_2$S | sulfonyl diacetonitrile | 37463-94-8 |
| C$_4$H$_4$N$_2$O$_3$ | barbituric acid | 67-52-7 |
| C$_4$H$_4$N$_2$O$_3$ | barbituric acid | 32267-40-6 |
| C$_4$H$_4$N$_2$O$_5$ | alloxan | 3237-50-1 |
| C$_4$H$_4$N$_2$S$_2$ | dithiouracil | 2001-93-6 |
| C$_4$H$_4$N$_2$S$_2$ | ethylene dithiocyanate | 629-17-4 |
| C$_4$H$_4$Na$_2$O$_4$ | sodium succinate | 150-90-3 |
| C$_4$H$_4$O | furan | 110-00-9 |
| C$_4$H$_4$O$_3$S | thiodiglycolic anhydride | 3261-87-8 |
| C$_4$H$_4$O$_4$ | ethylene oxalate | 3524-70-7 |
| C$_4$H$_4$O$_4$ | fumaric acid | 110-17-8 |
| C$_4$H$_4$O$_5$ | oxalacetic acid | 328-42-7 |
| C$_4$H$_4$S | thiophene | 110-02-1 |
| C$_4$H$_4$S$_2$ | 2-thiophenethiol | 7774-74-5 |
| C$_4$H$_4$S$_2$ | 3-thiophenethiol | 7774-73-4 |
| C$_4$H$_4$Se | selenophene | 288-05-1 |
| C$_4$H$_4$Te | tellurophene | 288-08-4 |
| C$_4$H$_5$BrF$_2$O$_2$ | ethyl bromodifluoroacetate | 667-27-6 |
| C$_4$H$_5$ClO | cyclopropanecarboxylic acid chloride | 4023-34-1 |
| C$_4$H$_5$ClO | methacryloyl chloride | 920-46-7 |
| C$_4$H$_5$ClO$_3$ | methyl malonyl chloride | 37517-81-0 |
| C$_4$H$_5$F$_5$O | ethyl pentafluoroethyl ether | 22052-81-9 |
| C$_4$H$_5$N | allyl isocyanide | 2835-21-4 |
| C$_4$H$_5$N | cyclopropanecarbonitrile | 5500-21-0 |
| C$_4$H$_5$N | pyrrole | 109-97-7 |
| C$_4$H$_5$NO$_2$S | ethoxycarbonyl isothiocyanate | 16182-04-0 |
| C$_4$H$_5$NO$_3$ | maleamic acid | 557-24-4 |
| C$_4$H$_5$NS | allyl isothiocyanate | 57-06-7 |
| C$_4$H$_5$N$_3$ | aminopyrazine | 5049-61-6 |
| C$_4$H$_5$N$_3$O$_3$ | uramil | 118-78-5 |
| C$_4$H$_6$ | cyclobutene | 822-35-5 |
| C$_4$H$_6$ | methylenecyclopropane | 6142-73-0 |
| C$_4$H$_6$Br$_2$O$_2$ | ethyl dibromoacetate | 617-33-4 |
| C$_4$H$_6$MgO$_4$ | magnesium acetate | 142-72-3 |
| C$_4$H$_6$N$_2$O$_2$ | dihydrouracil | 504-07-4 |
| C$_4$H$_6$N$_2$O$_2$ | dimethylfurazan monoxide | 2518-42-5 |
| C$_4$H$_6$N$_2$O$_2$ | ethyl diazoacetate | 623-73-4 |
| C$_4$H$_6$N$_2$S | methimazole | 60-56-0 |
| C$_4$H$_6$N$_4$O$_2$ | glycoluril | 496-46-8 |
| C$_4$H$_6$N$_4$O$_{12}$ | erythrityl tetranitrate | 142435-64-1 |
| C$_4$H$_6$O | crotonaldehyde | 123-73-9 |
| C$_4$H$_6$O | cyclobutanone | 1191-95-3 |
| C$_4$H$_6$O | cyclopropanecarboxaldehyde | 1489-69-6 |
| C$_4$H$_6$O | ethoxyacetylene | 927-80-0 |
| C$_4$H$_6$O | ethylketene | 20334-52-5 |
| C$_4$H$_6$O | methyl propargyl ether | 627-41-8 |
| C$_4$H$_6$O | methyl vinyl ketone | 78-94-4 |
| C$_4$H$_6$O | vinyl ether | 109-93-3 |
| C$_4$H$_6$OS | vinyl sulfoxide | 1115-15-7 |
| C$_4$H$_6$O$_2$ | acetic acid ethenyl ester | 108-05-4 |
| C$_4$H$_6$O$_2$ | crotonic acid | 107-93-7 |
| C$_4$H$_6$O$_2$ | crotonic acid | 3724-65-0 |
| C$_4$H$_6$O$_2$ | cyclopropanecarboxylic acid | 1759-53-1 |
| C$_4$H$_6$O$_2$ | isocrotonic acid | 503-64-0 |
| C$_4$H$_6$O$_2$S | diacetyl sulfide | 3232-39-1 |
| C$_4$H$_6$O$_2$S | divinyl sulfone | 77-77-0 |
| C$_4$H$_6$O$_3$ | acetic anhydride | 108-24-7 |
| C$_4$H$_6$O$_3$ | propylene carbonate | 108-32-7 |
| C$_4$H$_6$O$_4$ | butanedioic acid | 110-15-6 |
| C$_4$H$_6$O$_4$ | diacetyl peroxide | 110-22-5 |
| C$_4$H$_6$O$_4$ | methylmalonic acid | 516-05-2 |
| C$_4$H$_6$O$_4$Zn | zinc acetate | 557-34-6 |
| C$_4$H$_6$O$_5$ | diglycolic acid | 110-99-6 |
| C$_4$H$_6$O$_5$ | hydroxybutanedioic acid | 6915-15-7 |
| C$_4$H$_6$O$_5$ | methyltartronic acid | 595-98-2 |
| C$_4$H$_6$O$_6$ | meso tartaric acid | 147-73-9 |
| C$_4$H$_6$O$_6$ | tartaric acid | 133-37-9 |
| C$_4$H$_6$S | divinyl sulfide | 627-51-0 |
| C$_4$H$_6$S | 2,3-dihydrothiophene | 1120-59-8 |
| C$_4$H$_6$S$_4$ | dimethyl tetrathiooxalate | 61485-47-0 |
| C$_4$H$_7$ | cyclobutyl radical | 4548-06-5 |
| C$_4$H$_7$AlO$_5$ | aluminum diacetate | 142-03-0 |
| C$_4$H$_7$Br | cyclobutyl bromide | 4399-47-7 |
| C$_4$H$_7$BrO | isobutyryl bromide | 2736-37-0 |
| C$_4$H$_7$ClO | butanoyl chloride | 141-75-3 |
| C$_4$H$_7$ClO$_2$ | ethoxyacetyl chloride | 500025-15-0 |
| C$_4$H$_7$ClO$_2$ | ethyl chloroacetate | 105-39-5 |
| C$_4$H$_7$CsO$_2$ | caesium butyrate | 38869-25-9 |
| C$_4$H$_7$FO$_2$ | isopropyl fluoromethanoate | 500023-95-0 |
| C$_4$H$_7$F$_4$N | tetrafluorodiethylamine | 462-89-5 |
| C$_4$H$_7$IO$_2$ | ethyl iodoacetate | 623-48-3 |
| C$_4$H$_7$KO$_2$ | potassium butyrate | 589-39-9 |
| C$_4$H$_7$LiO$_2$ | lithium butyrate | 21303-03-7 |
| C$_4$H$_7$N | butyronitrile | 109-74-0 |
| C$_4$H$_7$NO | cyclopropanecarboxamide | 6228-73-5 |
| C$_4$H$_7$NO | ethoxyacetonitrile | 62957-60-2 |
| C$_4$H$_7$NO | methacrylamide | 79-39-0 |
| C$_4$H$_7$NO$_2$ | acetoacetamide | 5977-14-0 |
| C$_4$H$_7$NO$_3$ | ethyl oxamate | 617-36-7 |
| C$_4$H$_7$NO$_4$ | aspartic acid | 56-84-8 |
| C$_4$H$_7$NS | isopropyl isothiocyanate | 2253-73-8 |
| C$_4$H$_7$N$_3$O | creatinine | 60-27-5 |
| C$_4$H$_7$NaO$_2$ | sodium butyrate | 156-54-7 |
| C$_4$H$_7$O$_2$Rb | rubidium butyrate | 38869-23-7 |
| C$_4$H$_7$O$_2$Tl | thallium butyrate | 63424-49-7 |
| C$_4$H$_8$ | cyclobutane | 287-23-0 |
| C$_4$H$_8$ | methylcyclopropane | 594-11-6 |
| C$_4$H$_8$Cl$_2$Si | ethylvinyldichlorosilane | 10138-21-3 |
| C$_4$H$_8$Cl$_3$O$_4$P | metrifonate | 52-68-6 |
| C$_4$H$_8$N$_2$ | lysidine | 534-26-9 |
| C$_4$H$_8$N$_2$O$_2$ | butanediamide | 110-14-5 |
| C$_4$H$_8$N$_2$O$_3$ | ethyl allophanate | 626-36-8 |
| C$_4$H$_8$N$_2$O$_4$S$_2$ | dithiodiglycolicdihydroxamic acid | 764-29-4 |
| C$_4$H$_8$N$_2$S | allylthiourea | 109-57-9 |
| C$_4$H$_8$O | butanal | 123-72-8 |
| C$_4$H$_8$O | cyclobutanol | 2919-23-5 |
| C$_4$H$_8$O | cyclopropyl carbinol | 2516-33-8 |
| C$_4$H$_8$O | cyclopropyl methyl ether | 540-47-6 |
| C$_4$H$_8$O$_2$ | butyric acid | 107-92-6 |
| C$_4$H$_8$O$_2$ | ethyl acetate | 141-78-6 |
| C$_4$H$_8$O$_2$ | ethylene glycol monovinyl ether | 764-48-7 |
| C$_4$H$_8$O$_3$ | ethylene glycol monoacetate | 542-59-6 |
| C$_4$H$_8$O$_4$ | acetic acid dimer | 6993-75-5 |
| C$_4$H$_8$O$_4$ | 1,3,5,7-tetroxane | 293-30-1 |
| C$_4$H$_8$S | tetrahydrothiophene | 110-01-0 |
| C$_4$H$_8$S | ethylvinyl sulfide | 627-50-9 |
| C$_4$H$_8$S$_3$ | allyl methyl trisulfide | 34135-85-8 |
| C$_4$H$_9$ | isobutyl radical | 4630-45-9 |
| C$_4$H$_9$ClHg | isobutylmercuric chloride | 27151-74-2 |
| C$_4$H$_9$ClSi | vinyldimethylchlorosilane | 1719-58-0 |
| C$_4$H$_9$Cl$_2$OP | butylphosphonic dichloride | 2302-80-9 |
| C$_4$H$_9$Cl$_3$Si | isobutyltrichlorosilane | 18169-57-8 |
| C$_4$H$_9$F$_3$O$_3$SSi | trimethylsilyl trifluoromethanesulfonate | 27607-77-8 |
| C$_4$H$_9$Li | butyl lithium | 109-72-8 |
| C$_4$H$_9$N | cyclobutylamine | 2516-34-9 |
| C$_4$H$_9$N | pyrrolidine | 123-75-1 |
| C$_4$H$_9$NaO | sodium tert-butoxide | 865-48-5 |
| C$_4$H$_9$NO | butanamide | 541-35-5 |
| C$_4$H$_9$NO | morpholine | 110-91-8 |
| C$_4$H$_9$NO$_2$ | methylalanine | 3913-67-5 |
| C$_4$H$_9$NO$_2$ | propylcarbamate | 627-12-3 |
| C$_4$H$_9$NO$_3$ | butyl nitrate | 928-45-0 |
| C$_4$H$_9$NO$_3$ | isobutyl nitrate | 543-29-3 |
| C$_4$H$_9$NO$_3$ | threonine | 72-19-5 |
| C$_4$H$_9$NO$_4$ | ammonium acid succinate | 38457-08-8 |
| C$_4$H$_9$NO$_6$ | ammonium acid tartrate | 3095-65-6 |
| C$_4$H$_9$NS | dimethyl thioacetamide | 631-67-4 |
| C$_4$H$_9$NS | thiomorpholine | 123-90-0 |
| C$_4$H$_9$NSSi | trimethylsilyl isothiocyanate | 2290-65-5 |
| C$_4$H$_{10}$ | butane | 106-97-8 |
| C$_4$H$_{10}$ | isobutane | 75-28-5 |
| C$_4$H$_{10}$AlCl | diethylaluminumchloride | 96-10-6 |
| C$_4$H$_{10}$BCl | chlorodiethylborane | 5314-83-0 |
| C$_4$H$_{10}$BF$_3$O | boron trifluoride etherate | 109-63-7 |
| C$_4$H$_{10}$Be | diethylberyllium | 542-63-2 |
| C$_4$H$_{10}$Cl$_2$Si | dichlorodiethylsilane | 1719-53-5 |
| C$_4$H$_{10}$Cl$_2$Sn | diethyl dichloro tin | 866-55-7 |
| C$_4$H$_{10}$FO$_2$P | ethyl ethylphosphonofluoridate | 650-20-4 |
| C$_4$H$_{10}$FO$_2$P | propyl methylphosphonofluoridate | 763-14-4 |
| C$_4$H$_{10}$FO$_2$P | sarin | 107-44-8 |
| C$_4$H$_{10}$F$_3$NS | diethylaminosulfur trifluoride | 38078-09-0 |
| C$_4$H$_{10}$NO$_3$PS | acephate | 30560-19-1 |
| C$_4$H$_{10}$N$_2$ | diethyldiazene | 821-14-7 |
| C$_4$H$_{10}$N$_2$ | piperazine | 110-85-0 |
| C$_4$H$_{10}$N$_2$O | butyric acid hydrazide | 3538-65-6 |
| C$_4$H$_{10}$N$_4$O$_2$ | butanedioyl dihydrazide | 4146-43-4 |
| C$_4$H$_{10}$N$_4$O$_2$S | mercaptosuccindihydrazide | 687-57-0 |
| C$_4$H$_{10}$N$_4$O$_2$S$_2$ | dithiodiglycolic acid dihydrazide | 6854-84-8 |
| C$_4$H$_{10}$N$_4$S$_2$ | ethylenediamine dihydrothiocyanate | 22205-63-6 |
| C$_4$H$_{10}$O | ethoxy ethane | 60-29-7 |
| C$_4$H$_{10}$O | methyl propyl ether | 557-17-5 |
| C$_4$H$_{10}$OS | diethyl sulfoxide | 70-29-1 |
| C$_4$H$_{10}$O$_2$ | trimethylene glycol monomethyl ether | 1589-49-7 |
| C$_4$H$_{10}$O$_2$S | diethyl sulfone | 597-35-3 |
| C$_4$H$_{10}$O$_2$S | thiodiglycol | 111-48-8 |
| C$_4$H$_{10}$O$_4$S | butyl sulfuric acid | 15507-13-8 |
| C$_4$H$_{10}$O$_6$S$_3$ | trimethylsulfonylmethane | 67294-81-9 |
| C$_4$H$_{10}$S | diethyl sulfide | 352-93-2 |
| C$_4$H$_{10}$S$_2$ | methyl isopropyl disulfide | 40136-65-0 |
| C$_4$H$_{10}$S$_3$ | methyl propyl trisulfide | 17619-36-2 |
| C$_4$H$_{10}$S$_4$ | diethyl tetrasulfide | 13730-34-2 |
| C$_4$H$_{10}$Se$_2$ | diethyl diselenide | 628-39-7 |
| C$_4$H$_{10}$Te$_2$ | diethylditelluride | 26105-63-5 |
| C$_4$H$_{10}$Zn | diethylzinc | 557-20-0 |
| C$_4$H$_{11}$AsO$_2$ | diethylarsinic acid | 4964-27-6 |
| C$_4$H$_{11}$BO$_2$ | ethyldimethoxyborane | 7318-82-3 |
| C$_4$H$_{11}$ClSi | diethyldichlorosilane | 1609-19-4 |
| C$_4$H$_{11}$NO$_2$ | aminoacetaldehyde dimethyl acetal | 22483-09-6 |
| C$_4$H$_{11}$NO$_2$ | diethanolamine | 111-42-2 |
| C$_4$H$_{11}$N$_3$O$_7$ | diglycine nitrate | 6845-92-7 |
| C$_4$H$_{11}$O$_3$P | dimethyl ethylphosphonate | 6163-75-3 |
| C$_4$H$_{11}$O$_3$P | ethyl methyl methylphosphonate | 18755-36-7 |
| C$_4$H$_{12}$BrN | tetramethylammonium bromide | 64-20-0 |
| C$_4$H$_{12}$CdCl$_3$N | tetramethylammonium trichlorocadmate | 15976-91-7 |
| C$_4$H$_{12}$CdSe | dimethylcadmium·dimethylselenium | 143481-65-6 |
| C$_4$H$_{12}$ClN | tetramethylammonium chloride | 75-57-0 |
| C$_4$H$_{12}$GeO$_4$ | tetramethoxygermanium | 992-91-6 |
| C$_4$H$_{12}$IN | tetramethylammonium iodide | 75-58-1 |
| C$_4$H$_{12}$N$_2$ | tetramethylhydrazine | 6415-12-9 |
| C$_4$H$_{12}$N$_2$O$_4$ | ammonium succinate | 2226-88-2 |
| C$_4$H$_{12}$N$_2$O$_6$ | ammonium tartrate | 3164-29-2 |
| C$_4$H$_{12}$OSi | ethyldimethylsilanol | 5906-73-0 |
| C$_4$H$_{12}$OSi | trimethylsilylmethanol | 3219-63-4 |
| C$_4$H$_{12}$O$_4$Si | tetramethyl silicate | 681-84-5 |
| C$_4$H$_{12}$P$_2$ | tetramethylbiphosphine | 3676-91-3 |
| C$_4$H$_{12}$SSi | trimethylsilyl methyl sulfide | 3908-55-2 |
| C$_4$H$_{12}$SZn | dimethylzinc dimethylsulfide complex | 91071-61-3 |
| C$_4$H$_{12}$SeZn | dimethylzinc dimethylselenium complex | 108430-95-1 |
| C$_4$H$_{12}$Si | diethylsilane | 542-91-6 |
| C$_4$H$_{12}$TeZn | dimethylzinc dimethyltellerium complex | 127283-03-8 |
| C$_4$H$_{13}$Cl$_2$N | tetramethylammonium hydrogen dichloride | 5906-64-9 |
| C$_4$H$_{13}$NSi | trimethylsilylmethylamine | 18166-02-4 |
| C$_4$H$_{20}$I$_2$N$_4$Pt | tetramethylammonium platinum iodide | 131145-80-7 |
| C$_4$Ho | holmium tetracarbide | 12144-72-8 |
| C$_4$I$_4$S | tetraiodothiophene | 19259-11-1 |
| C$_4$La | lanthanum tetracarbide | 12603-31-5 |
| C$_4$Lu | lutetium tetracarbide | 37215-84-2 |
| C$_4$N | cyanopropynylidene | 129066-33-7 |
| C$_4$N$_2$O | dicyanoketene | 4361-47-1 |
| C$_4$N$_2$O$_2$ | oxalyl dicyanide | 36086-83-6 |
| C$_4$N$_2$S | dicyanothioketene | 54856-36-9 |
| C$_4$Nd | neodymium tetracarbide | 12373-84-1 |
| C$_4$NiO$_4$ | nickel tetracarbonyl | 13463-39-3 |
| C$_4$Sc | scandium tetracarbide | 12547-95-4 |
| C$_4$Th | thorium tetracarbide | 52931-63-2 |
| C$_4$Ti | titanium tetracarbide | 12547-96-5 |
| C$_4$U | uranium tetracarbide | 64539-55-5 |
| C$_4$Y | monoyttrium tetracarbide | 12547-98-7 |