The UMIST Database for Astrochemistry 2012 / astrochemistry.net

	Species	Empirical	Mass	Rate12	Name(s)
1	H	H	1	Y	Hydrogen
2	H^-	H^-	1	Y	Hydrogen anion
3	H⁺	H⁺	1	Y	Hydrogen ion
4	H₂	H₂	2	Y	Molecular hydrogen; Dihydrogen
5	H₂⁺	H₂⁺	2	Y	Dihydrogen ion
6	H₃⁺	H₃⁺	3	Y	Protonated dihydrogen
7	He	He	4	Y	Helium
8	He⁺	He⁺	4	Y	Helium ion
9	H₂D⁺	DH₂⁺	4		DH2+; Deuterated H3+
10	HeH⁺	HHe⁺	5	Y	Protonated helium; HHe+
11	C	C	12	Y	Carbon
12	C⁺	C⁺	12	Y	Carbon ion
13	C^-	C^-	12	Y	Carbon anion
14	CH	CH	13	Y	Methyladyne radical
15	CH⁺	CH⁺	13	Y	Methylidyne ion
16	N⁺	N⁺	14	Y	Atomic nitrogen ion
17	CH₂	CH₂	14	Y	Methylene radical
18	N	N	14	Y	Nitrogen
19	CH₂⁺	CH₂⁺	14	Y	Methylene ion
20	NH⁺	HN⁺	15	Y	Nitrogen hydride ion; HN+
21	CH₃⁺	CH₃⁺	15	Y	Methyl ion
22	CH₃	CH₃	15	Y	Methyl radical
23	NH	HN	15	Y	Nitrogen hydride; HN
24	NH₂	H₂N	16	Y	H2N; Aminyl radical
25	O	O	16	Y	Oxygen
26	CH₄⁺	CH₄⁺	16	Y	Methane ion
27	O⁺	O⁺	16	Y	Oxygen ion
28	CH₄	CH₄	16	Y	Methane
29	NH₂⁺	H₂N⁺	16	Y	H2N+; Protonated nitrogen
30	O^-	O^-	16	Y	Oxygen anion
31	NH₃⁺	H₃N⁺	17	Y	Ammonia ion; H3N+
32	NH₃	H₃N	17	Y	H3N; Ammonia
33	OH	HO	17	Y	Hydroxyl radical; HO
34	CH₅⁺	CH₅⁺	17	Y	Protonated methane
35	OH^-	HO^-	17	Y	Hydroxyl anion; HO-
36	OH⁺	HO⁺	17	Y	HO+; Hydroxyl ion
37	NH₄⁺	H₄N⁺	18	Y	Protonated ammonia; Ammonium ion; H4N+
38	H₂O⁺	H₂O⁺	18	Y	Water ion
39	H₂O	H₂O	18	Y	Water
40	ND₂H	D₂HN	19		NHD2D2HNDoubly deuterated ammonia
41	H₃O⁺	H₃O⁺	19	Y	Protonated water; Hydronium ion
42	HF	FH	20	Y	Hydrogen fluoride; FH
43	Na	Na	23	Y	Sodium
44	Na⁺	Na⁺	23	Y	Sodium ion
45	Mg⁺	Mg⁺	24	Y	Magnesium ion
46	C₂⁺	C₂⁺	24	Y	Dicarbide ion
47	C₂	C₂	24	Y	Dicarbide
48	Mg	Mg	24	Y	Magnesium
49	C₂H⁺	C₂H⁺	25	Y	Ethynyl ion
50	C₂H	C₂H	25	Y	Ethynyl radical
51	C₂H₂⁺	C₂H₂⁺	26	Y	Acetylene ion
52	C₂H₂	C₂H₂	26	Y	Acetylene
53	CN	CN	26	Y	Cyanogen radical
54	CN⁺	CN⁺	26	Y	Cyanogen ion
55	CN^-	CN^-	26	Y	Cyanide anion
56	CCD	C₂D	26		C2D; Deuterated ethynl radical
57	C₂H₃	C₂H₃	27	Y	Vinyl radical
58	HNC	CHN	27	Y	Hydrogen isocyanide; CHN
59	C₂H₃⁺	C₂H₃⁺	27	Y	Protonated acetylene; Vinyl ion
60	HCN⁺	CHN⁺	27	Y	CHN+Hydrogen cyanide ion
61	HCN	CHN	27	Y	Hydrogen cyanide
62	Si	Si	28	Y	Silicon
63	C₂H₄	C₂H₄	28	Y	Ethylene
64	N₂	N₂	28	Y	Molecular nitrogen
65	CO⁺	CO⁺	28	Y	Carbon monoxide ion
66	C₂H₄⁺	C₂H₄⁺	28	Y	Ethylene ion
67	Si⁺	Si⁺	28	Y	Silicon ion
68	HCNH⁺	CH₂N⁺	28	Y	CH2N+Protonated hydrogen cyanide
69	H₂CN	CH₂N	28	Y	Amidogen; Methylene amidogen; CH2N
70	CO	CO	28	Y	Carbon monoxide
71	N₂⁺	N₂⁺	28	Y	Dinitrogen ion
72	H₂NC⁺	CH₂N⁺	28	Y	Protonated hydrogen isocyanide
73	DNC	CDN	28		Deuterium isocyanide; CDN
74	HOC⁺	CHO⁺	29	Y	Hydroxymethylidynium; CHO+
75	CH₂NH	CH₃N	29	Y	Methylenimine; CH3N; Methanimine
76	HCO	CHO	29	Y	CHO; Formyl radical
77	SiH	HSi	29	Y	Silicon hydride; HSi
78	SiH⁺	HSi⁺	29	Y	HSi+; Silicon hydride ion
79	C₂H₅⁺	C₂H₅⁺	29	Y	Ethyl ion
80	HCO⁺	CHO⁺	29	Y	Formyl ion
81	C₂H₅	C₂H₅	29	Y	Ethyl radical
82	N₂H⁺	HN₂⁺	29	Y	HN2+
83	CH₂NH₂⁺	CH₄N⁺	30	Y	Protonated cyanamide
84	SiH₂⁺	H₂Si⁺	30	Y	H2Si+; Silylene ion
85	SiH₂	H₂Si	30	Y	Silylene; H2Si
86	NO⁺	NO⁺	30	Y	Nitric oxide ion
87	H₂CO⁺	CH₂O⁺	30	Y	Formaldehyde ion; CH2O+
88	H₂CO	CH₂O	30	Y	CH2O; Methanal; Formaldehyde
89	CH₃CH₃⁺	C₂H₆⁺	30	Y	Ethane ion; C2H6+
90	CH₄N⁺	CH₄N⁺	30	Y	Methyl amino ion
91	HOCH	CH₂O	30		Hydroxymethylene
92	CH₃CH₃	C₂H₆	30	Y	C2H6; Ethane
93	NO	NO	30	Y	Nitric oxide
94	C₂H₇⁺	C₂H₇⁺	31	Y	Protonated ethane
95	P⁺	P⁺	31	Y	Phosphorus ion
96	H₃CO⁺	CH₃O⁺	31	Y	H2COH+; CH3O+; Protonated formaldehyde
97	SiH₃	H₃Si	31	Y	H3Si; Silyl radical
98	HNO⁺	HNO⁺	31	Y	Nitroxyl ion
99	P	P	31	Y	Phosphorus
100	HNO	HNO	31	Y	Nitroxyl
101	SiH₃⁺	H₃Si⁺	31	Y	H3Si+; Silyl ion: H3Si+
102	CH₃NH₂	CH₅N	31		Methylamine; CH5N
103	CH₃O	CH₃O	31		Methoxy radical
104	HDCO	CDHO	31		CDHO; Deuterated formaldehyde
105	CH₃OH	CH₄O	32	Y	CH4OMethanol
106	PH⁺	HP⁺	32	Y	Phosphorus hydride ion; HP+
107	O₂	O₂	32	Y	Molecular oxygen
108	O₂⁺	O₂⁺	32	Y	Molecular oxygen ion
109	PH	HP	32	Y	HP; Phosphorus hydride
110	S^-	S^-	32	Y	Sulphur anion
111	CH₃OH⁺	CH₄O⁺	32	Y	CH4O+Methanol ion
112	SiH₄	H₄Si	32	Y	Silane; H4Si
113	S	S	32	Y	Sulphur
114	S⁺	S⁺	32	Y	Sulphur ion
115	H₂NO⁺	H₂NO⁺	32	Y	Protonated nitrosyl hydride
116	SiH₄⁺	H₄Si⁺	32	Y	H4Si+; Silane ion
117	D₂CO	CD₂O	32		Doubly deuterated formaldehyde; CD2O
118	PH₂⁺	H₂P⁺	33	Y	Phosphino ion; H2P+
119	PH₂	H₂P	33	Y	H2P; Phosphino
120	HS	HS	33	Y	Sulphur hydride
121	CH₃OH₂⁺	CH₅O⁺	33	Y	Protonated methanol; CH5O+
122	O₂H	HO₂	33	Y	HO2; Hydroperoxyl radical
123	SiH₅⁺	H₅Si⁺	33	Y	H5Si+Protonated silane
124	HS⁺	HS⁺	33	Y	Sulphur hydride ion
125	O₂H⁺	HO₂⁺	33	Y	Hydroperoxyl ion; HO2+
126	H₂S⁺	H₂S⁺	34	Y	Hydrogen sulphide ion
127	PH₃⁺	H₃P⁺	34	Y	H3P+; Phosphine ion
128	H₂S	H₂S	34	Y	Hydrogen sulphide
129	H₂O₂	H₂O₂	34	Y	Hydrogen peroxide
130	H₃S⁺	H₃S⁺	35	Y	Protonated hydrogen sulphide
131	Cl⁺	Cl⁺	35	Y	Chlorine ion
132	Cl	Cl	35	Y	Chlorine
133	C₃⁺	C₃⁺	36	Y	C3 ion
134	C₃	C₃	36	Y	C3 radical
135	HCl⁺	ClH⁺	36	Y	ClH+; Hydrogen chloride ion
136	HCl	ClH	36	Y	Hydrogen chloride; Hydrochloric acid; ClH
137	c-C₃H	C₃H	37	Y	C3H; Propynyl radical
138	C₃H⁺	C₃H⁺	37	Y	Propynyl ion
139	H₂Cl⁺	ClH₂⁺	37	Y	Protonated hydrogen chloride; ClH2+
140	C₂N	C₂N	38	Y	CCN
141	H₂CCC	C₃H₂	38	Y	C3H2; Propadienylidene
142	CNC⁺	C₂N⁺	38	Y
143	C₂N⁺	C₂N⁺	38	Y	CCN+
144	c-C₃H₂	C₃H₂	38	Y	Cyclopropenylidene
145	C₃H₂⁺	C₃H₂⁺	38	Y	Propadienylidene ion
146	C₂NH⁺	C₂HN⁺	39	Y	CCNH+; C2HN+
147	H₂C₃H⁺	C₃H₃⁺	39	Y	C3H3+; Protonated propadienylidene
148	C₃H₃⁺	C₃H₃⁺	39		Cyclopropenyl ion
149	C₃H₃	C₃H₃	39		Cyclopropenyl
150	HCCN	C₂HN	39		C2HN; HCCN radical
151	H₂C₃H	C₃H₃	39		Propargyl
152	C₃HD	C₃DH	39		C3DH; Deuterated cyclopropenylidene
153	CH₂CN⁺	C₂H₂N⁺	40	Y	Cyanomethane ion; C2H2N+
154	SiC⁺	CSi⁺	40	Y	CSi+; Silicon carbide ion
155	C₂O	C₂O	40	Y	CCO; Dicarbon monoxide
156	CH₂CN	C₂H₂N	40	Y	C2H2N; Cyanomethane radical
157	CH₃CCH	C₃H₄	40	Y	PropyneC3H4CH3C2HMethyl acetylene
158	C₂O⁺	C₂O⁺	40	Y	Dicarbon monoxide ion
159	CH₃CCH⁺	C₃H₄⁺	40	Y	CH3C2H+; Methyl acetylene ion; Propyne ion; C3H4+
160	SiC	CSi	40	Y	SiC radical; CSi; Silicon carbide
161	CH₂CCH₂	C₃H₄	40	Y	Allene
162	C₃H₅⁺	C₃H₅⁺	41	Y	cyc-C3H5+; CH2CHCH2+; Allyl ion
163	HC₂O⁺	C₂HO⁺	41	Y	Ketenyl ion; Ethynyloxy ion; HCCO+; C2HO+
164	CH₃CN	C₂H₃N	41	Y	C2H3N; Methyl cyanide
165	HCSi⁺	CHSi⁺	41	Y	Protonated silicon monocarbide; CHSi+
166	CH₃CN⁺	C₂H₃N⁺	41	Y	Methyl cyanide ion; C2H3N+
167	HCSi	CHSi	41	Y	CHSi
168	CH₃NC	C₂H₃N	41		Methyl isocyanide
169	CH₂CO	C₂H₂O	42	Y	C2H2OKeteneH2CCO
170	OCN	CNO	42	Y	NCO; OCN radical
171	SiCH₂⁺	CH₂Si⁺	42	Y	CH2Si+
172	OCN⁺	CNO⁺	42	Y	OCN ion; NCO+; CNO+
173	SiN	NSi	42	Y	Silicon nitride; NSi
174	SiN⁺	NSi⁺	42	Y	NSi+; Silicon nitride ion
175	CH₂CO⁺	C₂H₂O⁺	42	Y	Ketene ion; C2H2O+
176	SiCH₂	CH₂Si	42	Y	CH2Si; H2CSi
177	CH₃CNH⁺	C₂H₄N⁺	42	Y	C2H4N+Protonated acetonitrile
178	NH₂CN	CH₂N₂	42	Y	Cyanamide; CH2N2
179	CH₂DCN	C₂DH₂N	42		C2DH2N; Deuterated methyl cyanide
180	CP⁺	CP⁺	43	Y	Carbon monophosphide ion
181	CP	CP	43	Y	CP radical; Carbon monophosphide
182	SiCH₃	CH₃Si	43	Y	CH3Si; CH2SiH
183	HNCO⁺	CHNO⁺	43	Y	CHNO+; Isocyanic acid ion
184	SiCH₃⁺	CH₃Si⁺	43	Y	CH2SiH+; CH3Si+
185	HNSi	HNSi	43	Y	Iminosilicon
186	HNSi⁺	HNSi⁺	43	Y	Iminosilicon ion
187	CH₃CO⁺	C₂H₃O⁺	43	Y	C2H3O+; Acetyl radical ion
188	HNCO	CHNO	43	Y	Isocyanic acid; CHNO
189	CH₃CO	C₂H₃O	43		Acetyl radical; C2H3O
190	C₂H₅N	C₂H₅N	43		Ethylenimine; Aziridine
191	CS	CS	44	Y	Carbon monosulphide
192	HCP⁺	CHP⁺	44	Y	Methinophosphide ion; CHP+
193	CH₃CHO	C₂H₄O	44	Y	C2H4O; Acetaldehyde
194	CS⁺	CS⁺	44	Y	Carbon monosulphide ion
195	CO₂⁺	CO₂⁺	44	Y	Carbon dioxide ion
196	N₂O	N₂O	44	Y	Nitrous oxide
197	CO₂	CO₂	44	Y	Carbon dioxide
198	SiNH₂⁺	H₂NSi⁺	44	Y	H2NSi+
199	SiO⁺	OSi⁺	44	Y	OSi+; Silicon monoxide ion
200	HCP	CHP	44	Y	Methinophosphide; CHP
201	CH₃CHO⁺	C₂H₄O⁺	44	Y	Acetaldehyde ion; C2H4O+
202	SiO	OSi	44	Y	OSi; Silicon monoxide
203	SiCH₄⁺	CH₄Si⁺	44	Y	CH2SiH2+; CH4Si+
204	c-C₂H₄O	C₂H₄O	44		Ethylene oxide
205	CH₂CHOH	C₂H₄O	44		Vinyl alcohol
206	HCS⁺	CHS⁺	45	Y	CHS+; Thioformyl ion
207	CH₃CHOH⁺	C₂H₅O⁺	45	Y	C2H5O+
208	HCS	CHS	45	Y	CHS; Thioformyl radical
209	SiOH⁺	HOSi⁺	45	Y	HOSi+
210	PCH₂⁺	CH₂P⁺	45	Y	CH2P+
211	HCO₂⁺	CHO₂⁺	45	Y	Protonated carbon dioxide; CHO2+
212	PN⁺	NP⁺	45	Y	NP+; Phosphorus mononitride ion
213	PN	NP	45	Y	NPPhosphorus mononitride
214	HOCO	CHO₂	45		Hydroxyformyl radical; CHO2
215	HOCO⁺	CHO₂⁺	45
216	NH₂CHO	CH₃NO	45		Formamide; CH3NO
217	NS	NS	46	Y	Nitrogen sulphide
218	CH₃OCH₃⁺	C₂H₆O⁺	46	Y	C2H6O+; Dimethyl ether ion
219	CH₃OCH₃	C₂H₆O	46	Y	C2H6ODimethyl ether
220	NS⁺	NS⁺	46	Y	Nitrogen sulphide ion
221	H₂CS⁺	CH₂S⁺	46	Y	Thioformaldehyde ion; CH2S+
222	C₂H₅OH⁺	C₂H₆O⁺	46	Y	Ethanol ion
223	NO₂	NO₂	46	Y	Nitrogen dioxide
224	HPN⁺	HNP⁺	46	Y	HNP+
225	HCOOH	CH₂O₂	46	Y	CH2O2; Formic acid
226	H₂CS	CH₂S	46	Y	CH2SThioformaldehyde
227	H₂SiO	H₂OSi	46	Y	H2OSi
228	PCH₃⁺	CH₃P⁺	46	Y	CH3P+
229	H₂SiO⁺	H₂OSi⁺	46	Y	HSiOH+; H2OSi+
230	CH₂PH	CH₃P	46	Y	CH3P
231	CH₃CH₂OH	C₂H₆O	46	Y	Ethanol; C2H5OH; alcohol
232	NO₂⁺	NO₂⁺	46	Y	Nitrogen dioxide ion
233	AlF	AlF	46		Aluminium fluoride
234	H₃CS⁺	CH₃S⁺	47	Y	Protonated thioformaldehyde; CH3S+
235	PO⁺	OP⁺	47	Y	OP+
236	HNS⁺	HNS⁺	47	Y
237	HCOOH₂⁺	CH₃O₂⁺	47	Y	CHOOH2+; CH3O2+
238	C₂H₅OH₂⁺	C₂H₇O⁺	47	Y	C2H7O+; Protonated ethanol; C2H6OH+
239	CCl	CCl	47	Y	Carbon monochloride
240	CCl⁺	CCl⁺	47	Y	Carbon monochloride ion
241	C₂H₇O⁺	C₂H₇O⁺	47		Protonated dimethyl ether
242	PCH₄⁺	CH₄P⁺	47	Y	CH4P+
243	PNH₂⁺	H₂NP⁺	47	Y	H2NP+
244	H₃SiO⁺	H₃OSi⁺	47	Y	H3OSi+; H2SiOH+
245	PO	OP	47	Y	Phosphorus oxideOPPhosphorus monoxide
246	HDCS	CDHS	47		CDHS; Deuterated thioformaldehyde
247	PNH₃⁺	H₃NP⁺	48	Y	H3NP+
248	C₄⁺	C₄⁺	48	Y	Tetracarbon ion
249	SO	OS	48	Y	Sulphur monoxide; OS
250	HPO⁺	HOP⁺	48	Y	HOP+
251	C₄	C₄	48	Y	Tetracarbon
252	SO⁺	OS⁺	48	Y	Sulphur monoxide ion; OS+
253	HPO	HOP	48	Y	HOP
254	CH₃SH	CH₄S	48		CH4S; Methyl mercaptan
255	H₂PO⁺	H₂OP⁺	49	Y	HPOH+; H2OP+
256	C₄H	C₄H	49	Y	Butadiynyl radical
257	HSO⁺	HOS⁺	49	Y	HOS+
258	H₂CCl⁺	CClH₂⁺	49	Y	Chloromethyl ion; CH2Cl+; CClH2+
259	C₄H⁺	C₄H⁺	49	Y	Butadiynyl ion
260	NaCN	CNNa	49		Sodium cyanide; CNNa
261	C₃N⁺	C₃N⁺	50	Y	Cyanoethynyl ion
262	H₂CCCC	C₄H₂	50		H2C4; C4H2; Butatrienylidene
263	C₃N	C₃N	50	Y	Cyanoethynyl radical
264	C₄H₂⁺	C₄H₂⁺	50	Y	Diacetylene ion
265	MgCN	CMgN	50		Magnesium cyanide; CMgN
266	MgNC	CMgN	50		Magnesium isocyanide
267	C₄D	C₄D	50
268	HC₃N	C₃HN	51	Y	Cyanoacetylene; Propynenitrile; C3HN
269	C₄H₃⁺	C₄H₃⁺	51	Y
270	C₄H₃	C₄H₃	51	Y
271	ClO⁺	ClO⁺	51	Y	Chlorine monoxide ion
272	HC₃N⁺	C₃HN⁺	51	Y	C3HN+Cyanoacetylene ion
273	ClO	ClO	51	Y	Chlorine monoxide
274	HCCNC	C₃HN	51		Isocyanoacetylene
275	HNC₃	C₃HN	51	Y	HNCCCCyanoacetylene isomer
276	SiC₂⁺	C₂Si⁺	52	Y	C2Si+; Silicon dicarbide ion
277	C₄H₄⁺	C₄H₄⁺	52	Y	H2C=(cyc-C3H2)+; cyc-C4H4+
278	HC₃NH⁺	C₃H₂N⁺	52	Y	C3H2N+; Protonated cyanoacetylene
279	C₃O	C₃O	52	Y	Tricarbon monoxide
280	c-SiC₂	C₂Si	52		C2Si; Silicon dicarbide
281	C₃O⁺	C₃O⁺	52	Y	Tricarbon monoxide ion
282	C₂N₂⁺	C₂N₂⁺	52	Y	CNCN+; NCCN+
283	C₄H₄	C₄H₄	52		Cyclobutadiene
284	DC₃N	C₃DN	52		C3DNDeuterated cyanoacetylene
285	HC₃O⁺	C₃HO⁺	53	Y	HCCCO+; C3HO+
286	SiC₂H⁺	C₂HSi⁺	53	Y	C2HSi+; HCCSi+
287	CH₂CHCN	C₃H₃N	53	Y	C2H3CN; Vinyl cyanide; acrylonitrile; C3H3N
288	C₄H₅⁺	C₄H₅⁺	53	Y	But-2-yn-1-yl ion; 1-Butyn-3-yl ion
289	SiC₂H	C₂HSi	53	Y	C2HSiHCCSi
290	C₃H₂O⁺	C₃H₂O⁺	54	Y	Propynal ion
291	SiNC⁺	CNSi⁺	54	Y	Silicon monocyanide ion; SiCN+; CNSi+
292	SiC₂H₂	C₂H₂Si	54	Y	HCCSiH; cyc-HC=CHSi; cyc-H2SiCC; H2C=C=Si; C2H2Si
293	SiNC	CNSi	54	Y	CNSiSilicon isocyanide
294	H₄C₃N⁺	C₃H₄N⁺	54		Propenaldimine-1-yl ion; C3H4N+
295	SiC₂H₂⁺	C₂H₂Si⁺	54	Y	C2H2Si+; see SiC2H2
296	SiCN	CNSi	54		Silicon cyanide
297	HC₂CHO	C₃H₂O	54		Propynal; C3H2O
298	CCP	C₂P	55	Y	C2P; Dicarbon phosphide
299	CCP⁺	C₂P⁺	55	Y	C2P+Dicarbon phosphide ion
300	SiC₂H₃⁺	C₂H₃Si⁺	55	Y	SiH2CCH; C2H3Si+
301	SiNCH⁺	CHNSi⁺	55	Y	HSiCN+; HCNSi+; CHNSi+; HSiNC+; cyc-(HCSiN)+
302	H₃C₃O⁺	C₃H₃O⁺	55	Y	C3H3O+; Protonated propynal
303	CH₃CH₂CN	C₃H₅N	55	Y	propionitrileC3H5NC2H5CNEthyl cyanide
304	C₂S	C₂S	56	Y	CCS; C2S radical
305	Fe⁺	Fe⁺	56	Y	Iron ion
306	C₂S⁺	C₂S⁺	56	Y	C2S ion
307	HC₂P	C₂HP	56	Y	C2HP
308	Fe	Fe	56	Y	Iron
309	HC₂P⁺	C₂HP⁺	56	Y	C2HP+
310	C₃H₄O	C₃H₄O	56		Acrolein; Propenal
311	HC₂S⁺	C₂HS⁺	57	Y	HSCC+; C2HS+; HCCS+
312	PC₂H₂⁺	C₂H₂P⁺	57	Y	C2H2P+
313	CH₃COCH₃⁺	C₃H₆O⁺	58	Y	C3H6O+; Acetone ion
314	CH₃COCH₃	C₃H₆O	58	Y	Acetone C2H6CO; C3H6O
315	PC₂H₃⁺	C₂H₃P⁺	58	Y	CH3CP+; C2H3P+
316	NaCl	ClNa	58		ClNa; Sodium chloride
317	PC₂H₄⁺	C₂H₄P⁺	59	Y	C2H4P+
318	CH₃COCH₄⁺	C₃H₇O⁺	59	Y	C3H6OH+; Protonated acetone; Ethyl, 1-methoxy-, ion; C3H7O+
319	HNCS	CHNS	59		Thioisocyanic acid; CHNS
320	SiO₂	O₂Si	60	Y	O2Si; Silicon oxide; Silicon dioxide
321	C₅	C₅	60	Y	C5 radical
322	COOCH₄⁺	C₂H₄O₂⁺	60	Y	Acetic acid ion; Methyl formate ion; C2H4O2+
323	OCS	COS	60	Y	Carbonyl sulphide; COS
324	C₅⁺	C₅⁺	60	Y	C5 ion
325	SiS	SSi	60	Y	SSi; Silicon sulphide
326	SiS⁺	SSi⁺	60	Y	SSi+; Silicon sulphide ion
327	HCOOCH₃	C₂H₄O₂	60	Y	Methyl formate; C2H4O2
328	OCS⁺	COS⁺	60	Y	COS+; Carbonyl sulphide ion
329	CH₃OC₂H₅	C₃H₈O	60		Methyl ethyl ether; C3H8O
330	CH₃COOH	C₂H₄O₂	60		Acetic acid
331	CH₂OHCHO	C₂H₄O₂	60		Glycolaldehyde
332	HSiS⁺	HSSi⁺	61	Y	Protonated silicon sulphide; HSSi+
333	C₅H⁺	C₅H⁺	61	Y	Pentynylidyne ion
334	HOCS⁺	CHOS⁺	61	Y	CHOS+
335	HSiO₂⁺	HO₂Si⁺	61	Y	HO2Si+; Protonated silicon dioxide
336	C₅H	C₅H	61	Y	Pentynylidyne radical
337	H₅C₂O₂⁺	C₂H₅O₂⁺	61	Y	Protonated methyl formate; C2H5O2+
338	C₅H₂⁺	C₅H₂⁺	62	Y	HC5H+
339	C₅H₂	C₅H₂	62	Y	HC5H
340	C₄N⁺	C₄N⁺	62	Y	Cyanopropynylidene ion
341	AlCl	AlCl	62		Aluminium chloride
342	C₅H₃⁺	C₅H₃⁺	63	Y
343	HC₄N⁺	C₄HN⁺	63	Y	C4HN+; Protonated cyanopropynylidene
344	S₂⁺	S₂⁺	64	Y	Diatomic sulphur ion
345	SO₂	O₂S	64	Y	Sulphur dioxide; O2S
346	H₂C₄N⁺	C₄H₂N⁺	64	Y	C4H2N+
347	S₂	S₂	64	Y	Diatomic sulphur
348	CH₃C₄H	C₅H₄	64	Y	Methyldiacetylene; C5H4
349	CH₃C₄H⁺	C₅H₄⁺	64	Y	C5H4+; Methyldiacetylene ion
350	SiC₃	C₃Si	64	Y	C3Si
351	SiC₃⁺	C₃Si⁺	64	Y	C3Si+
352	SO₂⁺	O₂S⁺	64	Y	O2S+Sulphur dioxide ion
353	CH₃C₃N⁺	C₄H₃N⁺	65	Y	Methylcyanoacetylene ion; C4H3N+
354	CH₃C₃N	C₄H₃N	65	Y	C4H3N; Methylcyanoacetylene
355	C₅H₅⁺	C₅H₅⁺	65	Y	Cyclopentadienyl or Pent-1-en-4-yn-3-yl rad. ion
356	SiC₃H	C₃HSi	65	Y	C3HSi
357	HS₂⁺	HS₂⁺	65	Y
358	HSO₂⁺	HO₂S⁺	65	Y	HO2S+; Protonated sulphur dioxide
359	HS₂	HS₂	65	Y
360	SiC₃H⁺	C₃HSi⁺	65	Y	C3HSi+
361	CH₃C₂NC	C₄H₃N	65		Methylisocyanoacetylene
362	SiC₃H₂⁺	C₃H₂Si⁺	66	Y	C3H2Si+
363	H₂S₂⁺	H₂S₂⁺	66	Y	HSSH+; Dihydrogen disulphide ion
364	CH₃C₃NH⁺	C₄H₄N⁺	66	Y	C4H4N+; H4C4N+
365	H₂S₂	H₂S₂	66	Y	HSSH; Dihydrogen disulphide; Hydrogen persulphide
366	C₃P	C₃P	67	Y
367	H₃S₂⁺	H₃S₂⁺	67	Y
368	CH₂CHCH₂CN	C₄H₅N	67		Allyl cyanide; C4H5N
369	CH₃CHCHCN	C₄H₅N	67		Crotonitrile
370	CH₂CCH₃CN	C₄H₅N	67		Methacrylonitrile
371	C₃S⁺	C₃S⁺	68	Y	C3S ion
372	C₃S	C₃S	68	Y	C3S radical
373	PC₃H⁺	C₃HP⁺	68	Y	C3HP+
374	HC₃S⁺	C₃HS⁺	69	Y	C3HS+
375	C₆⁺	C₆⁺	72	Y	Carbon hexamer ion
376	C₆	C₆	72	Y	cyc-C6; Carbon hexamer
377	C₆H	C₆H	73	Y	Hexatriynyl radical
378	C₆H⁺	C₆H⁺	73	Y	Hexatriynyl ion
379	C₆H₂	C₆H₂	74	Y	Hexapentaenylidene; H2C6
380	C₅N⁺	C₅N⁺	74	Y
381	C₅N	C₅N	74	Y	Cyanobutadiynyl radical
382	C₆H₂⁺	C₆H₂⁺	74	Y	Triacetylene ion
383	C₂H₅OC₂H₅	C₄H₁₀O	74		(C2H5)2O; C4H10O; Diethyl ether
384	C₆H₃⁺	C₆H₃⁺	75	Y
385	HC₅N	C₅HN	75	Y	Cyanobutadiyne; C5HN
386	HC₅N⁺	C₅HN⁺	75	Y	C5HN+; Cyanobutadiyne ion
387	KCl	ClK	74		ClK; Potassium chloride
388	NH₂CH₂COOH	C₂H₅NO₂	75		Glycine; C2H5NO2
389	C₆H₄⁺	C₆H₄⁺	76	Y
390	H₂C₅N⁺	C₅H₂N⁺	76		Protonated cyanobutadiyne; C5H2N+
391	SiC₄	C₄Si	76	Y	C4Si
392	SiC₄⁺	C₄Si⁺	76	Y	C4Si+
393	C₅O	C₅O	76
394	DC₅N	C₅DN	76		C5DN; Deuterated cyanodiacetylene
395	SiC₄H⁺	C₄HSi⁺	77	Y	C4HSi+
396	C₆H₅⁺	C₆H₅⁺	77	Y
397	H₃C₅N⁺	C₅H₃N⁺	77	Y	C5H3N+; cyc-C5H3N+
398	C₆H₆	C₆H₆	78	Y	Benzene
399	C₄P	C₄P	79	Y
400	C₄P⁺	C₄P⁺	79	Y
401	C₆H₇⁺	C₆H₇⁺	79	Y	Protonated benzene
402	C₄S	C₄S	80	Y
403	PC₄H⁺	C₄HP⁺	80	Y	C4HP+
404	C₄S⁺	C₄S⁺	80	Y
405	HC₄S⁺	C₄HS⁺	81	Y	C4HS+
406	C₇	C₇	84	Y
407	C₇⁺	C₇⁺	84	Y
408	C₇H	C₇H	85	Y	C7H radical
409	C₇H⁺	C₇H⁺	85	Y
410	C₇H₂⁺	C₇H₂⁺	86	Y	HC7H+
411	C₇H₂	C₇H₂	86	Y	HC7H
412	C₇H₃⁺	C₇H₃⁺	87	Y
413	C₇H₄⁺	C₇H₄⁺	88	Y
414	CH₃C₆H	C₇H₄	88	Y	C7H4
415	C₇H₅⁺	C₇H₅⁺	89	Y
416	CH₃C₅N	C₆H₃N	89	Y	Hexa-2,4-diynenitrile; C6H3N
417	CH₃C₅NH⁺	C₆H₄N⁺	90	Y	Cyanocyclopentadienyl radical ion; H4C6N+; C6H4N+
418	C₅S	C₅S	92
419	C₈⁺	C₈⁺	96	Y	cyc-C8+
420	C₈	C₈	96	Y	cyc-C8
421	C₈H	C₈H	97	Y
422	C₈H⁺	C₈H⁺	97	Y
423	C₇N⁺	C₇N⁺	98	Y
424	C₈H₂	C₈H₂	98	Y	1,3,5,7-Octatetrayne
425	C₈H₂⁺	C₈H₂⁺	98	Y
426	C₇N	C₇N	98	Y
427	C₈H₃⁺	C₈H₃⁺	99	Y
428	HC₇N	C₇HN	99	Y	C7HN; Cyanohexatriyne
429	HC₇N⁺	C₇HN⁺	99	Y	Cyanohexatriyne ion; C7HN+
430	C₈H₄⁺	C₈H₄⁺	100	Y
431	H₂C₇N⁺	C₇H₂N⁺	100	Y	Protonated cyanohexatriyne; C7H2N+
432	H₃C₇N⁺	C₇H₃N⁺	101	Y	C7H3N+
433	C₈H₅⁺	C₈H₅⁺	101	Y
434	C₉	C₉	108	Y
435	C₉⁺	C₉⁺	108	Y
436	C₉H⁺	C₉H⁺	109	Y
437	C₉H	C₉H	109	Y
438	C₉H₂	C₉H₂	110	Y	HC9H
439	C₉H₂⁺	C₉H₂⁺	110	Y	HC9H+
440	C₉H₃⁺	C₉H₃⁺	111	Y
441	C₉H₄⁺	C₉H₄⁺	112	Y
442	C₉H₅⁺	C₉H₅⁺	113	Y
443	CH₃C₇N	C₈H₃N	113	Y	C8H3N
444	CH₃C₇NH⁺	C₈H₄N⁺	114	Y	C8H4N+
445	C₁₀⁺	C₁₀⁺	120	Y	cyc-C10+
446	C₉N	C₉N	122	Y
447	C₉N⁺	C₉N⁺	122	Y
448	HC₉N	C₉HN	123	Y	C9HN; Cyanooctatetrayne
449	HC₉N⁺	C₉HN⁺	123	Y	Cyanooctatetrayne ion; C9HN+
450	H₂C₉N⁺	C₉H₂N⁺	124	Y	C9H2N+; Protonated cyanooctatetrayne
451	H₃C₉N⁺	C₉H₃N⁺	125	Y	C9H3N+
452	HC₁₁N	C₁₁HN	147		Cyanodecapentayne; C11HN
453	¹³CO	CO	29		Carbon monoxide isotopologue; CO isotopologue
454	C¹⁸O	CO	30
455	C³⁴S	CS	46		Carbon monosulphide isotopologue; CS isotopologue
456	H¹³CO⁺	CHO	30		CHO isotopologue; Formyl ion isotopologue
457	H¹³CN	CHN	28		Hydrogen cyanide isotopologue; CHN isotopologue
458	HN¹³C	CHN	28		Hydrogen isocyanide isotopologue
459	C¹⁷O	CO	29
460	³⁴SO	OS	52		OS isotopologueSulphur monoxide isotopologue
461	¹³CC₂H₂	C₃H₂	39		C3H2 isotopologue; Cyclopropenylidene isomer isotopologue
462	¹³CH₃OH	CH₄O	33		Methanol isotopologue; CH4O isotopologue
463	¹³CS	CS	45
464	C³³S	CS	45
465	¹³C³⁴S	CS	47
466	HDO	DHO	19		DHO; Deuterated water
467	HC¹⁵N	CHN	28
468	HC¹⁸O⁺	CHO	31
469	OC³⁴S	COS	62		COS isotopologue; Carbonyl sulphide isotopologue
470	¹⁸OCS	COS	62
471	O¹³CS	COS	61
472	³⁴SO₂	O₂S	66		Sulphur dioxide isotopologue; O2S isotopologue
473	³³SO₂	O₂S	65
474	SO¹⁸O	O₂S	66
475	H₂¹³CO	CH₂O	31		CH2O isotopologue; Formaldehyde isotopologue
476	HCC¹³CN	C₃HN	52		Cyanoacetylene isotopologue; Propynenitrile isotopologue; C3HN isotopologue
477	HC¹³CCN	C₃HN	52
478	H¹³CCCN	C₃HN	52
479	¹³CH₃CN	C₂H₃N	42		C2H3N isotopologue; Methyl cyanide isotopologue
480	CH₃¹³CN	C₂H₃N	42
481	²⁹SiO	OSi	45		OSi isotopologue; Silicon monoxide isotopologue
482	³⁰SiO	OSi	46
483	³³SO	OS	49
484	S¹⁸O	OS	50
485	HC¹⁷O⁺	CHO⁺	30		CHO+ isotopologue
486	HC³⁴S	CHS	47		Thioformyl radical isotopologue; CHS isotopologue
487	HC₄H	C₄H₂	50	Y	Diacetylene; HCCCCH
488	DCN	CDN	28		Deuterium cyanide
489	DCO⁺	CDO	30		CDO; Deuterated formyl ion
490	HDS	DHS	35		Deuterated hydrogen sulphide; DHS
491	N₂D⁺	DN₂⁺	30		DN2+
492	CH₃OD	CDH₃O	33		CDH3O; Deuterated methanol
493	D¹³CO⁺	CDO	31		CDO isotopologue; Deuterated formyl ion isotopologue
494	HCOOD	CDHO₂	47		Deuterated formic acid; CDHO2
495	H¹³COOH	CH₂O₂	47		CH2O2 isotopologue; Formic acid isotopologue
496	H₂¹³CS	CH₂S	47		Thioformaldehyde isotopologue; CH2S isotopologue
497	H₂C³⁴S	CH₂S	48
498	l-C₃H	C₃H	37
499	Na³⁷Cl	ClNa	60		Sodium chloride isotopologue; ClNa isotopologue
500	Al³⁷Cl	AlCl	64		AlCl isotopologue; Aluminium chloride isotopologue
501	H₂CCCO	C₃H₂O	54		Propadienone
502	CH₂DCCH	C₃DH₃	41		Deuterated methyl acetylene; C3DH3
503	CH₃CCD	C₃DH₃	41
504	CH₂DOH	CDH₃O	33
505	NH₂D	DH₂N	18		DH2N; Deuterated ammonia
506	CH₃C¹³CH	C₃H₄	41		C3H4 isotopologueMethyl acetylene isotopologue
507	FeO	FeO	72		Iron Oxide
508	TiO	OTi	64		Titanium Oxide; OTi
509	D₂O	D₂O	20		Doubly deuterated water
510	AlNC	AlCN	53		AlCN; Aluminium isocyanide
511	HD	DH	3		Deuterated molecular hydrogen; DH
512	F	F	19	Y	Fluorine
513	Al	Al	27		Aluminium
514	K	K	39		Potassium
515	Ca	Ca	40		Calcium
516	Sc	Sc	45		Scandium
517	Ti	Ti	48		Titanium
518	V	V	51		Vanadium
519	Cr	Cr	52		Chromium
520	Mn	Mn	55		Manganese
521	Ni	Ni	59		Nickel
522	Cu	Cu	64		Copper
523	Br	Br	80		Bromine
524	Sr	Sr	88		Strontium
525	Y	Y	89		Yttrium
526	Zr	Zr	91		Zirconium
527	AlC	AlC	39
528	AlH	AlH	28
529	AlN	AlN	41
530	AlO	AlO	43
531	AlS	AlS	59
532	CaBr	BrCa	120		BrCa
533	HBr	BrH	81		BrH
534	KBr	BrK	119		BrK
535	MgBr	BrMg	104		BrMg
536	NaBr	BrNa	103		BrNa
537	CaCl	CaCl	75
538	CaF	CaF	59
539	CaH	CaH	41
540	CaO	CaO	56
541	CaS	CaS	72
542	FeCl	ClFe	91		ClFe
543	MgCl	ClMg	59		ClMg
544	SrCl	ClSr	123		ClSr
545	TiCl	ClTi	83		ClTi
546	ZrCl	ClZr	126		ClZr; Zirconium chloride
547	CrH	CrH	53
548	CrO	CrO	68
549	CuH	CuH	65
550	CuO	CuO	80
551	CuS	CuS	96
552	FeF	FFe	75		FFe
553	KF	FK	58		FK
554	MgF	FMg	43		FMg
555	NaF	FNa	42		FNa
556	SrF	FSr	107		FSr
557	TiF	FTi	67		FTi
558	ZrF	FZr	110		Zirconium fluoride; FZr
559	FeS	FeS	88		Iron sulphide
560	KH	HK	40		HK
561	MgH	HMg	25		HMg
562	MnH	HMn	56		HMn
563	NaH	HNa	24		HNa
564	NiH	HNi	60		HNi
565	SrH	HSr	89		HSr
566	ZrH	HZr	92		HZrZirconium hydride
567	KO	KO	55
568	MgN	MgN	38
569	MgO	MgO	40
570	MgS	MgS	56
571	MnO	MnO	71
572	MnS	MnS	87
573	TiN	NTi	62		NTi
574	ZrN	NZr	105		Zirconium nitride; NZr
575	NaO	NaO	39
576	NiO	NiO	75
577	ScO	OSc	61		OSc
578	SrO	OSr	104		OSr
579	VO	OV	67		Vanadium monoxide; OV
580	YO	OY	105		OY; Yttrium monoxide
581	ZrO	OZr	107		Zirconium monoxide; OZr
582	P₂	P₂	62
583	PS	PS	63
584	ScS	SSc	77		SSc
585	SrS	SSr	120		SSr
586	TiS	STi	80		STi
587	YS	SY	121		Yttrium monosulphide; SY
588	ZrS	SZr	123		SZr; Zirconium sulphide
589	Si₂	Si₂	56
590	Al₂O	Al₂O	70
591	AlCl₂	AlCl₂	97
592	AlClF	AlClF	81
593	AlOCl	AlOCl	78
594	AlF₂	AlF₂	65
595	AlOF	AlFO	62		AlFO
596	AlHO	AlHO	44
597	AlOH	AlHO	44
598	AlO₂	AlO₂	59
599	CaBr₂	Br₂Ca	200		Br2Ca
600	MgBr₂	Br₂Mg	184		Br2Mg
601	CS₂	CS₂	76
602	Si₂C	CSi₂	68		CSi2
603	CaCl₂	CaCl₂	110
604	CaF₂	CaF₂	78
605	CaOH	CaHO	57		CaHO
606	FeCl₂	Cl₂Fe	126		Cl2Fe
607	MgCl₂	Cl₂Mg	94		Cl2Mg
608	SrCl₂	Cl₂Sr	158		Cl2Sr
609	TiCl₂	Cl₂Ti	118		Cl2Ti
610	ZrCl₂	Cl₂Zr	161		Zirconium dichloride; Cl2Zr
611	CrO₂	CrO₂	84
612	FeF₂	F₂Fe	94		F2Fe
613	MgF₂	F₂Mg	62		F2Mg
614	SrF₂	F₂Sr	126		F2Sr
615	TiF₂	F₂Ti	86		F2Ti
616	ZrF₂	F₂Zr	129		F2Zr; Zirconium difluoride
617	TiOF	FOTi	83		FOTi
618	KOH	HKO	56		HKO
619	MgOH	HMgO	41		HMgO
620	NaOH	HNaO	40		HNaO
621	SrOH	HOSr	105		HOSr
622	ScO₂	O₂Sc	77		O2Sc
623	SiC₂	C₂Si	52	Y
624	TiO₂	O₂Ti	80		O2Ti
625	VO₂	O₂V	83		O2V; Vanadium dioxide
626	YO₂	O₂Y	121		Yttrium dioxide; O2Y
627	ZrO₂	O₂Zr	123		O2Zr; Zirconium dioxide
628	Al₂O₂	Al₂O₂	86
629	AlCl₃	AlCl₃	132
630	AlF₃	AlF₃	84
631	AlO₂H	AlHO₂	60		AlHO2
632	NCCN	C₂N₂	52	Y	Cyanogen; C2N2
633	HCNO	CHNO	43	Y
634	CrO₃	CrO₃	100
635	PH₃	H₃P	34		H3P
636	HNO₂	HNO₂	47
637	NO₃	NO₃	62
638	SO₃	O₃S	80		O3S
639	C₃O₂	C₃O₂	68
640	CaO₂H₂	CaH₂O₂	74		CaH2O2
641	SiH₃Cl	ClH₃Si	66		ClH3Si
642	SiH₃F	FH₃Si	50		FH3Si
643	FeO₂H₂	FeH₂O₂	90		FeH2O2
644	MgO₂H₂	H₂MgO₂	58		H2MgO2
645	SrO₂H₂	H₂O₂Sr	122		H2O2Sr
646	HNO₃	HNO₃	63
647	N₂O₄	N₂O₄	92
648	H₂SO₄	H₂O₄S	98		H2O4S
649	K₂SO₄	K₂O₄S	174		K2O4S
650	Na₂SO₄	NaO₄S₂	142		NaO4S2
651	C₄N	C₄N	62	Y	Cyanopropynylidene
652	PC₄H₂⁺	C₄H₂P⁺	81		C4H2P+
653	e^-	e^-	0	Y	electron
654	D₂S	D₂S	36		Doubly deuterated hydrogen sulphide
655	NH₂CONH₂	CH₄N₂O	60		Urea; CH4N2O
656	ND₃	D₃N	20		D3N; Triply deuterated ammonia
657	¹³C¹⁷O	CO	30
658	CH₃CH₂CHO	C₃H₆O	58		PropionaldehydePropanal
659	H₂PCN	CH₂NP	59		Cyanophosphine; CH2NP
660	CD₃OD	CD₄O	36		CD4O
661	CHD₂OH	CD₂H₂O	34		CD2H2O
662	CD₃OH	CD₃HO	35		CD3HO
663	¹²C¹³C	C₂	25		C2 isotopologue; Dicarbide isotopologue
664	¹³CN	CN	27		CN isotopologueCyanogen radical isotopologue
665	HNCO^-	CHNO^-	43		CHNO-
666	HCNC₂	C₃HN	51
667	CH₆N⁺	CH₆N⁺	32
668	HC₄O⁺	C₄HO⁺	65		C4HO+
669	HSiO⁺	HOSi⁺	45
670	HNC⁺	CHN⁺	27		Hydrogen isocyanide ion
671	NaH₂O⁺	H₂NaO⁺	41		H2NaO+
672	C₅H₄N⁺	C₅H₄N⁺	78
673	NH₂CNH⁺	CH₃N₂⁺	43	Y	CH3N2+
674	CH₂CHCN⁺	C₃H₂N⁺	53	Y	Vinyl cyanide ion
675	HCOOH⁺	CH₂O⁺	46	Y	Formic acid ion
676	NH₂CH₂O⁺	CH₄NO⁺	46		CH4NO+
677	C₄H₇⁺	C₄H₇⁺	55	Y
678	NaH₂⁺	H₂Na⁺	25		H2Na+
679	CH₃NH₂⁺	CH₅N⁺	31		CH5N+; Methylamine ion
680	CH₃OCH₄⁺	C₂H₇O⁺	47	Y
681	HCCCCCCH	C₆H₂	74		Triacetylene
682	HD₂⁺	D₂H⁺	5		D2H+Doubly deuterated H3+
683	D₃⁺	D₃⁺	6		Fully deuterated H3+
684	HC₄N	HC₄N	63
685	OCN^-	CNO^-	42		CNO-; OCN anion
686	COOH⁺	CHOO⁺	45		CHOO+
687	LiH	HLi	8		Lithium hydride; HLi
688	D	D	2		Deuterium
689	¹⁸O	O	18		Oxygen-18; O isotope
690	¹⁷O	O	17		Oxygen-17
691	C₁₄H₁₀	C₁₄H₁₀	178		Anthracene
692	C₁₂H₁₀	C₁₂H₁₀	154		Biphenyl
693	C₁₀H₈	C₁₀H₈	128		Napthalene
694	C₁₄H₉CH₃	C₁₅H₁₂	192		C15H12; Methylanthracene
695	HOCH₂CH₂OH	C₂H₆O₂	62		Ethylene glycol; C2H6O2
696	t-HCOH	CH₂O	30		trans hydroxy methylene
697	C₂H₅CN	C₃H₅N	55		Proprionitrile, ethyl cyanide
698	C₃H₇CN	C₄H₇N	69		C4H7N; Butyronitrile
699	C₂D₂	C₂D₂	28		Doubly deuterated acetylene
700	C₄H₁₀	C₄H₁₀	58		Isobutane
701	C₄H₈	C₄H₈	56		1-butene
702	C₄H₆	C₄H₆	54
703	¹³CCH₂	¹³CCH₂	27		Acetylene isotopologue
704	H₂¹⁸O	H₂¹⁸O	20		Water isotopologue
705	H₂C¹⁸O	CH₂¹⁸O	32		CH2(18)O
706	HCOO^-	CHO₂^-	45		CHO2-; Formate ion
707	HNCNH	CH₂N₂	42		Carbodiimide
708	NH₂COHNH	CH₄N₂O	60		Isourea
709	C₄N₂	C₄N₂	76		Dicyanoacetylene
710	HC₃¹⁵N	C₃H¹⁵N	52		C3H(15)N
711	CH₃CHCH₂	C₃H₆	42	Y	PropyleneC3H6Propene
712	CH₃CH₂CH₃	C₃H₈	44		Propane; C3H8
713	CH₃CH₂CH₂CH₂CH₃	C₅H₁₂	72		C5H12; Pentane
714	C₆H₁₄	C₆H₁₄	86		Hexane
715	Ca⁺	Ca⁺	40		Calcium ion
716	D₂	D₂	4		Molecular deuterium
717	H₂¹⁷O	H₂¹⁷O	19
718	C₁₃H₁₀	C₁₃H₁₀	166		Fluorene
719	C₁₂H₈	C₁₂H₈	152		Acenaphthylene
720	D₂CS	CD₂S	48		Doubly deuterated thioformaldehyde; CD2S
721	HF⁺	FH⁺	20	Y	FH+; Hydrogen fluoride ion
722	H₂F⁺	FH₂⁺	21	Y	Protonated hydrogen fluoride; FH2+
723	CF⁺	CF⁺	31	Y	Fluoromethylidyne ion
724	C₃H₆⁺	C₃H₆⁺	42	Y	Cyclopropane ion
725	C₃H₇⁺	C₃H₇⁺	43	Y	Isopropyl ion
726	HN₂O⁺	HN₂O⁺	45	Y	Protonated nitrous oxide
727	SiF⁺	FSi⁺	47	Y	Silicon fluoride ion; FSi+
728	NCCNH⁺	C₂HN₂⁺	53	Y	C2HN2+; Protonated cyanogen
729	C₂H₃CN⁺	C₃H₃N⁺	53		C3H3N+
730	CH₃CS⁺	C₂H₃S⁺	59	Y	C2H3S+
731	NCCNCH₃⁺	C₃H₃N₂⁺	67	Y	C3H3N2+
732	C₁₀	C₁₀	120	Y
733	C₆H₆⁺	C₆H₆⁺	78	Y	Benzene ion
734	F⁺	F⁺	19	Y	Fluorine cation
735	N₂O⁺	N₂O⁺	44	Y	Nitrogen oxide cation
736	C₂^-	C₂^-	24	Y
737	C₃^-	C₃^-	36	Y
738	C₄^-	C₄^-	48	Y
739	C₅^-	C₅^-	60	Y
740	C₆^-	C₆^-	72	Y
741	C₇^-	C₇^-	84	Y
742	C₈^-	C₈^-	96	Y
743	O₂^-	O₂^-	32	Y
744	C₁₀^-	C₁₀^-	120	Y
745	C₁₀H^-	C₁₀H^-	121	Y
746	C₂H^-	C₂H^-	25	Y
747	C₃H^-	C₃H^-	37	Y
748	C₃N^-	C₃N^-	50	Y
749	C₄H^-	C₄H^-	49	Y
750	C₅H^-	C₅H^-	61	Y
751	C₅N^-	C₅N^-	74	Y
752	C₆H^-	C₆H^-	73	Y
753	C₇H^-	C₇H^-	85	Y
754	C₈H^-	C₈H^-	97	Y
755	C₉^-	C₉^-	108	Y
756	C₉H^-	C₉H^-	109	Y
757	CH^-	CH^-	13	Y
758	C₁₀H	C₁₀H	121	Y
759	CRPHOT	CRPHOT	0	Y
760	PHOTON	PHOTON	0	Y
761	HONC	CHNO	43	Y
762	C₁₀H₂	C₁₀H₂	122	Y
763	C₁₁	C₁₁	132	Y
764	C₁₁⁺	C₁₁⁺	132	Y
765	C₁₀H₂⁺	C₁₀H₂⁺	122	Y
766	C₁₀H⁺	C₁₀H⁺	121	Y
767	C₁₀H₃⁺	C₁₀H₃⁺	123	Y
768	HOCN	CHNO	43	Y
769	HOCN⁺	CHNO⁺	43	Y
770	HONC⁺	CHNO⁺	43	Y
771	HCNO⁺	CHNO⁺	43	Y
772	CNO	CNO	42	Y
773	H₂NCO⁺	CH₂NO⁺	44	Y	CH2NO+
774	H₂CNO⁺	CH₂NO⁺	44	Y
775	H₂OCN⁺	CH₂NO⁺	44	Y
776	HCNOH⁺	CH₂NO⁺	44	Y
777	HNCOH⁺	CH₂NO⁺	44	Y
778	C₂H₅CNH⁺	C₃H₆N⁺	56	Y	C3H6N+
779	CH₂CHCNH⁺	C₃H₄N⁺	54	Y
780	CH₂CCH⁺	C₃H₃⁺	39	Y
781	CRP	CRP	0	Y
782	CH₂CCH	C₃H₃	39	Y
783	HC₅NH⁺	C₅H₂N⁺	76	Y
784	CH₂CHCCH	C₄H₄	52	Y	1-Buten-3-yne
785	CH₂CHCHCH₂	C₄H₆	54	Y	1,3-butadiene
786	M	M	0		Termolecular reaction partner