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               Periodic Table for chemical entities containing the selected element
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Entity Names Starting With The Letter H	Structure	Reactions Forming	Reactions Using	Wikipedia	NIST
[H]	[H]		32		NIST
H (histidine)		1	1	Wikipedia	NIST
H•	H•	20	10	Wikipedia	NIST
Hübnerite	MnWO4
H+	H+	77	547	Wikipedia	NIST
H+/H2O	H+(aq)		15
H-	H–		36	Wikipedia	NIST
H2	H2	139	158	Wikipedia	NIST
[H2AsO4]-	[H2AsO4]–	1	1		NIST
[H2As]-	[H2As]–		1		NIST
[H2Br]+	[BrH2]+	1			NIST
H2C=C=O	H2C=C=O	4	4	Wikipedia	NIST
H2CCO	H2C=C=O	4	4	Wikipedia	NIST
[H2Cl]+	[ClH2]+	1			NIST
H2CO	HCHO	6	25	Wikipedia	NIST
H2CO3	H2CO3	1		Wikipedia	NIST
H2CrO4	H2CrO4	2		Wikipedia	NIST
[H2F]+	[FH2]+	2			NIST
[H2GeO4]2-	[H2GeO4]2–		1		NIST
H2N•	H2N•				NIST
H2N2	HN=NH			Wikipedia	NIST
H2NCH2CH2CH2CH2NH2		2		Wikipedia	NIST
H2NCl	H2NCl	1	3	Wikipedia	NIST
H2NOH.HCl		1		Wikipedia	NIST
H2NSO2NH2	H2NSO2NH2		1	Wikipedia	NIST
[H2N]-	[H2N]–	2	18		NIST
H2O	H2O	529	531	Wikipedia	NIST
H2O(g)	H2O(g)	3	1	Wikipedia	NIST
H2O2	HOOH	12	30	Wikipedia	NIST
H2O3S	H2SO3	4	2	Wikipedia	NIST
H2O4S	H2SO4	25	74	Wikipedia	NIST
[H2PO2]-	[H2PO2]–	2	1		NIST
[H2PO3]-	[H3PO4]–	1	1		NIST
[H2PO4]-	[H2PO4]–	1	3		NIST
H2PPH2	P2H6			Wikipedia	NIST
[H2P]-	[H2P]–		1		NIST
H2S	H2S	10	22	Wikipedia	NIST
H2S(aq)	H2S(aq)	1		Wikipedia	NIST
H2S2	HSSH	1			NIST
H2S2O3		1	1	Wikipedia	NIST
H2S2O4		1			NIST
H2S2O5		1			NIST
H2S2O6		1			NIST
H2S2O7	H2S2O7	1	6	Wikipedia	NIST
H2S2O8		2	1		NIST
H2S4O6		1			NIST
H2Se	H2Se	3	1	Wikipedia	NIST
H2SeO3	H2SeO3	2	1	Wikipedia	NIST
H2SeO4		1		Wikipedia	NIST
[H2Se]-	[H2Sb]–		1		NIST
H2SiF6(aq)	H2SiF6(aq)	2	1	Wikipedia	NIST
H2SO3	H2SO3	4	2	Wikipedia	NIST
H2SO4	H2SO4	25	74	Wikipedia	NIST
H2SO4(aq)	H2SO4(aq)	3	11	Wikipedia	NIST
H2SO5		2	2	Wikipedia	NIST
H2Te	H2Te	1	2	Wikipedia	NIST
H2TeO3	H2TeO3	1		Wikipedia	NIST
[H2]+	[H2]+•	2	1		NIST
H3Al	AlH3		2	Wikipedia	NIST
H3AsO4	H3AsO4	1			NIST
H3B	BH3		2	Wikipedia	NIST
H3BO3	H3BO3	10	9	Wikipedia	NIST
[H3GeO4]-	[H3GeO4]–	1	1		NIST
[H3IO6]2-	[H3IO6]2–		1		NIST
[H3N2]-	[NH2–NH]–		1		NIST
H3P	PH3	6	2	Wikipedia	NIST
H3PO2	H3PO2	2	2	Wikipedia	NIST
H3PO3	H3PO3	8	1	Wikipedia	NIST
H3PO4	H3PO4	8	7	Wikipedia	NIST
H3Sb	H3Sb	7	1	Wikipedia	NIST
[H3Si]-	[H3Si]–		1		NIST
[H3]+	[H3]+	2	3	Wikipedia	NIST
H4Ge	GeH4	3		Wikipedia	NIST
[H4IO6]-	[H4IO6]–	1	1		NIST
H4P2O5					NIST
H4P2O6			1		NIST
H4P2O7		2		Wikipedia	NIST
[H4P]+	[PH4]+	1			NIST
H4Si	SiH4	5		Wikipedia	NIST
Hadron, bosonic	Bosonic Hadron			Wikipedia
Hadron, fermionic	Fermionic Hadron			Wikipedia
Haem		1		Wikipedia	NIST
Haemoglobin				Wikipedia
Hafnia	HfO2			Wikipedia	NIST
Hafnium	Hf			Wikipedia	NIST
Hafnium(III) bromide	HfBr3				NIST
Hafnium(III) chloride	HfCl3				NIST
Hafnium(III) iodide	HfI3				NIST
Hafnium(IV) bromide	HfBr4				NIST
Hafnium(IV) chloride	HfCl4			Wikipedia	NIST
Hafnium(IV) fluoride	HfF4				NIST
Hafnium(IV) iodide	HfI4				NIST
Hafnium(IV) oxide	HfO2			Wikipedia	NIST
Halite	NaCl halite			Wikipedia
Hallucinogen (generic)	Hallucinogen			Wikipedia
alpha-Halo aldehyde or ketone (generic)
Haloalkane (AS/A2 generic)			2	Wikipedia
Halogen (AS/A2 generic)				Wikipedia
Halogen (generic)	Group VIIa/17 Halogens			Wikipedia
Halogen anion (AS/A2 generic)		1		Wikipedia
Halon	CCl2F2	4	1	Wikipedia	NIST
Halon 104	CCl4	11	5	Wikipedia	NIST
Hard Lewis acid (generic)				Wikipedia
Hard Lewis base (generic)				Wikipedia
Hard margarine	Hard Margarine	1		Wikipedia	NIST
HArF	H–Ar–F	1		Wikipedia	NIST
Harmotome	(Ba0.5,Ca0.5,Na,K)5 Al5,Si11O32. 12H2O			Wikipedia
Hartshorn	(NH4)2CO3		1	Wikipedia	NIST
[HAsO4]2-	[HAsO4]2–	1	1		NIST
Hassium	Hs			Wikipedia	NIST
Hausmannite	Mn3O4		1		NIST
Haüyne	Na3Ca(Si3Al3) O12(SO4)			Wikipedia
HBF4	H+ [BF4]–	2		Wikipedia	NIST
HBF4	HBF4(aq)	2	1	Wikipedia	NIST
HBO2	HBO2	2	1	Wikipedia	NIST
HBr	HBr	22	20	Wikipedia	NIST
HBr/CH3COOH	HBr in CH3COOH 30% W/W	1			NIST
HBrO	HOBr	4	1	Wikipedia	NIST
HBrO3	HBrO3	2		Wikipedia	NIST
HCCH	HC≡CH	9	25	Wikipedia	NIST
HCClF2	HCClF2	1	1	Wikipedia	NIST
[HCC]-	HC≡C–	1	2	Wikipedia	NIST
HCHO	HCHO	6	25	Wikipedia	NIST
HCl	HCl	107	50	Wikipedia	NIST
HCl + NO3	Aqua Regia	1	2	Wikipedia	NIST
HCl(aq)	HCl(aq)	2	13	Wikipedia	NIST
HCl(conc)	HCl(conc)	2	9	Wikipedia	NIST
HClO	HClO	6	4	Wikipedia	NIST
HClO2	HClO2	2		Wikipedia	NIST
HClO3	HClO3	2	1	Wikipedia	NIST
HClO4	HClO4	4	1	Wikipedia	NIST
HCN	HCN	5	18	Wikipedia	NIST
HCo(CO)3	HCo(CO)3	2	1		NIST
HCo(CO)4	HCo(CO)4	1	1		NIST
[HCO3]-	[HCO3]–	4	5		NIST
HCOCl		1			NIST
HCONH2	HCONH2	2	2	Wikipedia	NIST
HCOOCH3		2	5	Wikipedia	NIST
HCOOH	HCOOH	7	2	Wikipedia	NIST
HCOONa	HCOONa	5	2	Wikipedia	NIST
HCOOR	HCOOR	1
[HCOO]-	[HCOO]–		1	Wikipedia	NIST
[HCrO4]-	[HCrO4]–				NIST
HD	HD	1			NIST
He	He	2	1	Wikipedia	NIST
Heavy distillate	Fuel oil	1	2	Wikipedia	NIST
Heavy hydrogen	D2	1	1	Wikipedia	NIST
Heavy metal Lewis acid (generic)			4	Wikipedia
Heavy water	D2		1	Wikipedia	NIST
Helium	He	2	1	Wikipedia	NIST
Helium 3	3H	1	1	Wikipedia	NIST
Helium 4	α	44	6	Wikipedia	NIST
Helium family (generic)	Group VIIIa/18 Noble Gases			Wikipedia
Helonium ion	[HHe]+	1			NIST
Hematite	Fe2O3		1	Wikipedia
Hemiacetal (generic)		1		Wikipedia
Hemiketal (generic)		1		Wikipedia
Hemimorphite	Zn3Si2O7(OH)2 .H3O			Wikipedia
Heneicosane			1	Wikipedia	NIST
Hepta-5-ene-2,3-dicarboxylic anhydride		1			NIST
Heptane			1		NIST
Heptane, bicyclio[4.1.0]		1			NIST
Heroin		1		Wikipedia	NIST
Heteroauxin				Wikipedia	NIST
5 Heterocycle (generic)				Wikipedia
6 Heterocycle (generic)				Wikipedia
Heterocycle, polycyclic (generic)				Wikipedia
Heterogeneous mixture (generic)	Heterogeneous Mixture			Wikipedia
Heulandite	Ca,Na)2-3Al3 (Al,Si)2Si13O36 .12H2O			Wikipedia
Hexaamminochromium(III) ion	[Cr(NH3)6]2+	2			NIST
Hexaamminocobalt(II) ion	[Co(NH3)6]2+	1	3		NIST
Hexaamminocobalt(III) ion	[Co(NH3)6]3+	2			NIST
Hexaaquaaluminium complex ion	[Al(H2O)6]3+	2	6		NIST
Hexaaquachromium(II) ion	[Cr(H2O)6]2+	3			NIST
Hexaaquachromium(III) ion	[Cr(H2O)6]2+	3	9		NIST
Hexaaquacobolt(II) ion	[Co(H2O)6]2+	4	10		NIST
Hexaaquacopper(II) ion	[Cu(H2O)6]2+	3	8		NIST
Hexaaquairon(II) ion	[Fe(H2O)6]2+	3	10		NIST
Hexaaquairon(III) ion	[Fe(H2O)6]3+	6	9		NIST
Hexaaquamanganese(II) ion	[Mn(H2O)6]2+	5			NIST
Hexaaquavanadium(II) ion	[V(H2O)6]2+	4			NIST
Hexaaquavanadium(III) ion	[V(H2O)6]3+	2	1		NIST
Hexadecanoic acid	CH3(CH2)14COOH	6		Wikipedia	NIST
(9Z)-Hexadecenoic acid	Palmitoleic Acid			Wikipedia	NIST
(2E, 4E)-Hexadiene			2		NIST
(2E, 4Z)-Hexadiene			2		NIST
Hexafluoroaluminate ion	[AlF6]3–		1		NIST
Hexafluoroantimonate(V)	[SbF6]–	2	1		NIST
Hexafluoroarsinate ion	[AsF6]–	3	1		NIST
Hexafluoroethane	C2F6	1		Wikipedia	NIST
Hexafluoropalladium(IV)	[PdF6]2–				NIST
Hexafluoroplatinate ion	[PtF6]–	1	1		NIST
Hexafluorosilicate ion	[SiF6]2–	2	2		NIST
Hexafluorosilicic acid (aqueous)	H2SiF6(aq)	2	1	Wikipedia	NIST
Hexafluorosulfur	SF6	5		Wikipedia	NIST
4,4a,5,6,7,8- Hexahydro-2(3H)- naphthalenone			4		NIST
Hexahydrobenzoic acid		1	1		NIST
Hexahydroiron(II) ion	[FeH6]4–	1	1		NIST
Hexahydroxychromium(III) ion	[Cr(OH)6]3–	2	1		NIST
1,2,3,4,5,6-Hexahydroxyhexane		1		Wikipedia	NIST
3,3,6,6,9,9-Hexamethyl-1,2,4,5,7,8-hexoxonane		1	1	Wikipedia	NIST
Hexamethylene		5	7	Wikipedia	NIST
Hexamethylenediamine		1	1	Wikipedia	NIST
Hexamethylenetetramine		1	2	Wikipedia	NIST
Hexamethylphosphoramide	HMPA			Wikipedia	NIST
Hexamethylphosphoric triamide	HMPA			Wikipedia	NIST
Hexamine		1	2	Wikipedia	NIST
Hexane		1	5	Wikipedia	NIST
Hexane-1,6-diamine		1	1	Wikipedia	NIST
Hexanedioic acid		4	3	Wikipedia	NIST
6-Hexanolactone		1		Wikipedia	NIST
1,3,5-Hexatriene					NIST
HF	HF	30	39	Wikipedia	NIST
Hf	Hf			Wikipedia	NIST
(HF)6	(HF)6	1		Wikipedia	NIST
HfBr3	HfBr3				NIST
HfBr4	HfBr4				NIST
HfCl3	HfCl3				NIST
HfCl4	HfCl4			Wikipedia	NIST
HfF4	HfF4				NIST
HfI3	HfI3				NIST
HfI4	HfI4				NIST
HfO2	HfO2			Wikipedia	NIST
HFO3S	HSO3F	2	2	Wikipedia	NIST
Hg	Hg	4	1	Wikipedia	NIST
Hg(NO3)2	Hg(NO3)2	1	1	Wikipedia	NIST
Hg(OAc)2	Hg(OCOCH3)2	1		Wikipedia	NIST
Hg(ONC)2	Hg(ONC)2	2		Wikipedia	NIST
Hg2+	Hg2+		9		NIST
Hg2Br2	Hg2Br2	1			NIST
Hg2Cl2	Hg2Cl2	1	1	Wikipedia	NIST
Hg2F2	Hg2F2				NIST
Hg2I2	Hg2I2	1			NIST
Hg2O	Hg2O				NIST
Hg2S	Hg2S	1			NIST
[Hg2]2+	Hg23+	1	5		NIST
HgBr2	HgBr2				NIST
HgCl2	HgCl2	2	1	Wikipedia	NIST
HgF2	HgF2			Wikipedia	NIST
HgI2	HgI2			Wikipedia	NIST
HgO	HgO	2	2	Wikipedia	NIST
HgS	HgS	1		Wikipedia	NIST
HgSO4	HgSO4	1	3	Wikipedia	NIST
HI	HI	12	13	Wikipedia	NIST
HIO	HOI	5		Wikipedia	NIST
HIO3	HIO3	4	1	Wikipedia	NIST
HIO4	HIO4	2	1	Wikipedia	NIST
His		1	1	Wikipedia	NIST
Histidine		1	1	Wikipedia	NIST
Histidine, deprotonated			1	Wikipedia	NIST
Histidine, doubly-protonated		1		Wikipedia	NIST
Histidine, protonated		1	1	Wikipedia	NIST
HMDA		1	1	Wikipedia	NIST
HMPA	HMPA			Wikipedia	NIST
HMPT	HMPA			Wikipedia	NIST
HMX			1	Wikipedia	NIST
HN3	HN3	2	3	Wikipedia	NIST
HN=C=NH	HN=C=NH	2	3	Wikipedia	NIST
HN=NH	HN=NH			Wikipedia	NIST
HNa	NaH	2	7	Wikipedia	NIST
HNO2	HNO2	9	10	Wikipedia	NIST
HNO3	HNO3	6	25	Wikipedia	NIST
HNO3 (5 molar)	HNO3 5 molar	1	1	Wikipedia	NIST
HNO3(aq)	HNO3(aq)	3	3	Wikipedia	NIST
HNO3(g)	HNO3(g)	1	1	Wikipedia	NIST
HNO3, fuming	HNO3 fuming	2	3	Wikipedia	NIST
[HN]2-	[HN]2–		1	Wikipedia	NIST
Ho	Ho			Wikipedia	NIST
HO.	HO•	12	8	Wikipedia	NIST
Ho2O3	Ho2O3			Wikipedia	NIST
HOBr	HOBr	4	1	Wikipedia	NIST
HoBr3	HoBr3				NIST
HOCH2CH2OH		6	9	Wikipedia	NIST
HOCl	HClO	6	4	Wikipedia	NIST
HoCl3	HoCl3				NIST
HOD	DOH	1			NIST
HOF	HOF	2	1		NIST
HoF3	HoF3				NIST
HoI3	HoI3				NIST
Holmia	Ho2O3			Wikipedia	NIST
Holmium	Ho			Wikipedia	NIST
Holmium bromide	HoBr3				NIST
Holmium chloride	HoCl3				NIST
Holmium fluoride	HoF3				NIST
Holmium iodide	HoI3				NIST
Holmium(III) oxide	Ho2O3			Wikipedia	NIST
Homberg's phosphorus	CaCl2	9		Wikipedia	NIST
Homogeneous mixture (generic)	Homogeneous Mixture			Wikipedia
HONC	H–O=N=C	1		Wikipedia	NIST
HONO	HNO2	9	10	Wikipedia	NIST
HOO•	HOO•	1	5		NIST
HOOCCOOH		5	2	Wikipedia	NIST
HOOH	HOOH	12	30	Wikipedia	NIST
[HOO]-	[HOO]–		2		NIST
Horn silver	AgCl			Wikipedia
Hornblende	Ca2(Mg,Fe,Al)5 (Al,Si)8O22(OH)2			Wikipedia
Host (generic)			1
Host-guest complex		1
[HO]+	[HO]+		1		NIST
[HO]-	[OH]–	25	79	Wikipedia	NIST
[HPO3]2-	[HPO3]2–		1	Wikipedia	NIST
[HPO4]2-	[HPO4]2–	1	2		NIST
Hs	Hs			Wikipedia	NIST
HS•	HS•				NIST
[HSeO3]-	[HSeO3]–	1	1		NIST
[HSeO4]-	[HSeO4]–				NIST
[HSe]-	[HSe]–		1		NIST
[HSiO3]-	[HSiO3]–				NIST
HSO3Cl	HSO3Cl	1	2	Wikipedia	NIST
HSO3F	HSO3F	2	2	Wikipedia	NIST
[HSO3]-	[HSO3]–	3	8		NIST
[HSO4]-	[HSO4]–	17	3		NIST
HSSH	HSSH	1			NIST
[HSS]-	[HSS]–	1	1		NIST
[HS]+	[HS]+				NIST
[HS]-	[HS]–	1	8		NIST
[HTeO3]-	[HTeO3]–	1	1		NIST
[HTe]-	[HTe]–		2		NIST
Humite series	Mg(OH,F)2 .1-4Mg2SiO4			Wikipedia
[HXeO4]-	[HXeO4]–	1	1		NIST
Hydracryonitrile		1	3		NIST
Hydrargyrum	Hg	4	1	Wikipedia	NIST
Hydrated aluminium hydroxide	Al(H2O)3(OH)3 Al(OH)3	4	3		NIST
Hydrated oxonium ion		1		Wikipedia	NIST
Hydrazide anion	[NH2–NH]–		1		NIST
Hydrazine	H2N–NH2	5	11	Wikipedia	NIST
Hydrazine, 1° alkyl (generic)	R–CH2–NNH2	1		Wikipedia
Hydrazine, 2,4-dinitrophenyl				Wikipedia	NIST
Hydrazine, alkyl (generic)	R–NHNH2			Wikipedia
Hydrazine, mono-protonated	[H2N-NH3]+				NIST
Hydrazine, N,N-Dialkyl (generic)	(R)2N–NH2	1		Wikipedia
Hydrazine, phenyl			1	Wikipedia	NIST
Hydrazinium ion	[H2N-NH3]+				NIST
Hydrazoic acid	HN3	2	3	Wikipedia	NIST
Hydrazoic acid anion	[N3]–		5	Wikipedia	NIST
Hydrazone (generic)	RHC=N–NH2	1	1	Wikipedia
Hydride donor Lewis acid reducing agent (generic)
Hydride ion	H–		36	Wikipedia	NIST
Hydride ion complex reducing agent (generic)
Hydridocarbide ion	HC≡C–	1	2	Wikipedia	NIST
Hydrochloric acid, aqueous	HCl(aq)	2	13	Wikipedia	NIST
Hydrochloric acid, concentrated	HCl(conc)	2	9	Wikipedia	NIST
Hydrofluoric acid.antimony(V) pentafluoride	ROH	2		Wikipedia	NIST
Hydrogen	H2	139	158	Wikipedia	NIST
Hydrogen 1	1H	3	7	Wikipedia
Hydrogen acetylide anion	HC≡C–	1	2	Wikipedia	NIST
Hydrogen arsenate ion	[HAsO4]2–	1	1		NIST
Hydrogen atom	H•	20	10	Wikipedia	NIST
Hydrogen azide	HN3	2	3	Wikipedia	NIST
Hydrogen bond complex (generic)				Wikipedia
Hydrogen bromide	HBr	22	20	Wikipedia	NIST
Hydrogen bromide, 30% solution in acetic acid	HBr in CH3COOH 30% W/W	1			NIST
Hydrogen carbide	CH4	14	32	Wikipedia	NIST
Hydrogen carbide ion	HC≡C–	1	2	Wikipedia	NIST
Hydrogen carbonate ion	[HCO3]–	4	5		NIST
Hydrogen carbonyl radical		5	6		NIST
Hydrogen chloride	HCl	107	50	Wikipedia	NIST
Hydrogen chromate ion	[HCrO4]–				NIST
Hydrogen citrate ion		1	1		NIST
Hydrogen cyanamide	HN=C=NH	2	3	Wikipedia	NIST
Hydrogen cyanide	HCN	5	18	Wikipedia	NIST
Hydrogen delivered equivalents	[H]		32		NIST
Hydrogen deuteride	HD	1			NIST
Hydrogen deuterium oxide	DOH	1			NIST
Hydrogen difluoride ion	[FHF]–	3	2	Wikipedia	NIST
Hydrogen disulfide ion	[HSS]–	1	1		NIST
Hydrogen family (generic)	Group Ia/1 Alkali Metals			Wikipedia
Hydrogen fluoride	HF	30	39	Wikipedia	NIST
Hydrogen fluoride dimer		1		Wikipedia	NIST
Hydrogen fluoride hexamer	(HF)6	1		Wikipedia	NIST
Hydrogen fluoride/Fluoride ion Complex	[FHF]–	3	2	Wikipedia	NIST
Hydrogen fumarate ion		1	1		NIST
Hydrogen hydroxide	H2O	529	531	Wikipedia	NIST
Hydrogen iodide	HI	12	13	Wikipedia	NIST
Hydrogen ion	H+	77	547	Wikipedia	NIST
Hydrogen malonate ion		1	1		NIST
Hydrogen o-phthalate ion		1	1		NIST
Hydrogen oxide	H2O	529	531	Wikipedia	NIST
Hydrogen peroxide	HOOH	12	30	Wikipedia	NIST
Hydrogen peroxide anion	[HOO]–		2		NIST
Hydrogen peroxide radical	HOO•	1	5		NIST
Hydrogen peroxide radical anion	[H2O2]+•	1	1		NIST
Hydrogen phosphate dianion	[HPO4]2–	1	2		NIST
Hydrogen phosphite ion	[H3PO4]–	1	1		NIST
Hydrogen radical	H•	20	10	Wikipedia	NIST
Hydrogen removal oxidising agent (generic)
Hydrogen selenate ion	[HSeO4]–				NIST
Hydrogen selenide	H2Se	3	1	Wikipedia	NIST
Hydrogen selenide ion	[HSe]–		1		NIST
Hydrogen selenite ion	[HSeO3]–	1	1		NIST
Hydrogen silicate ion	[HSiO3]–				NIST
Hydrogen succinate ion		1	1		NIST
Hydrogen sulfate ion	[HSO4]–	17	3		NIST
Hydrogen sulfenium ion	[HS]+				NIST
Hydrogen sulfide	H2S	10	22	Wikipedia	NIST
Hydrogen sulfide anion	[HS]–	1	8		NIST
Hydrogen sulfide, aqueous	H2S(aq)	1		Wikipedia	NIST
Hydrogen sulfide radical	HS•				NIST
Hydrogen sulfite ion	[HSO3]–	3	8		NIST
Hydrogen sulphate ion	[HSO4]–	17	3		NIST
Hydrogen sulphide anion	[HS]–	1	8		NIST
Hydrogen sulphide ion	H2S	10	22	Wikipedia	NIST
Hydrogen tartrate ion		1	1		NIST
Hydrogen telluride	H2Te	1	2	Wikipedia	NIST
Hydrogen telluride anion	[HTe]–		2		NIST
Hydrogen tellurite ion	[HTeO3]–	1	1		NIST
Hydrogen, ortho	↑H–H↑	1		Wikipedia	NIST
Hydrogen, para	↑H–H↓			Wikipedia	NIST
Hydrogen, protonated	[H3]+	2	3	Wikipedia	NIST
Hydrogenation reduction system (generic)				Wikipedia
Hydrogenic ion	[H3]+	2	3	Wikipedia	NIST
Hydrogenol	H2O	529	531	Wikipedia	NIST
Hydrohydroxynitroyl (generic)
Hydron	H+	77	547	Wikipedia	NIST
Hydronitroyl (generic)
Hydronium ion, [H3O]+	[H3O]+	5	5		NIST
Hydronium ion, [H3]+	[H3]+	2	3	Wikipedia	NIST
Hydroperoxy radical	HOO•	1	5		NIST
Hydroquinone		2		Wikipedia	NIST
Hydroxide ion	[OH]–	25	79	Wikipedia	NIST
Hydroxy acid anion (generic)	X–O–
Hydroxy acid, protonated (generic)
beta-Hydroxy aldehyde (generic)		2
Hydroxy alkoxy carbenium ion (generic)		1
beta-Hydroxy amine (generic)		1
2-Hydroxy benzoic acid		1	2	Wikipedia	NIST
Hydroxy carbenium ion		1			NIST
Hydroxy cation	[HO]+		1		NIST
beta-Hydroxy ether (generic)		1
Hydroxy radical	HO•	12	8	Wikipedia	NIST
2-Hydroxy-2-methylbutane		1			NIST
2-Hydroxy-2-methylbutanenitrile		1	1		NIST
2-Hydroxy-2-methylpropanenitrile		1	1		NIST
2-Hydroxy-3-methylbutane			1		NIST
4-Hydroxy-4-methyl-2-pentanone		1	1		NIST
Hydroxyacetic acid		2		Wikipedia	NIST
4-Hydroxyaminobenzene		1		Wikipedia	NIST
Hydroxyammonium ion	[H3N-OH]+	4			NIST
4-Hydroxyazobenzene		1			NIST
2-Hydroxybenzaldehyde			1	Wikipedia	NIST
Hydroxybenzene		8	10	Wikipedia	NIST
3-Hydroxybutanal		1	2		NIST
2-Hydroxybutane		1	2	Wikipedia	NIST
(2S)-2-Hydroxybutanedioic acid		1	1	Wikipedia	NIST
2-Hydroxybutanedioic acid		1		Wikipedia	NIST
4-Hydroxybutyric acid gamma lactone		2	3	Wikipedia	NIST
Hydroxydialkoxy carbenium ion (generic)		1
Hydroxyethanoic acid		2		Wikipedia	NIST
2-Hydroxyethyl ethanoate		1	1		NIST
Hydroxyfumaric acid		1	1	Wikipedia	NIST
2-Hydroxyisobutylnitrile		1	1		NIST
Hydroxyl radical	HO•	12	8	Wikipedia	NIST
Hydroxylamine	H2N–OH	1	7	Wikipedia	NIST
Hydroxylamine (generic)	R–NHOH			Wikipedia
Hydroxylamine hydrochloride		1		Wikipedia	NIST
Hydroxylamine, protonated	[H3N-OH]+	4			NIST
Hydroxymaleic acid		1	1	Wikipedia	NIST
Hydroxymethyl carbenium ion		1			NIST
1-Hydroxynaphthalene			2		NIST
Hydroxynitrile (AS/A2 generic)		2		Wikipedia
Hydroxynitrile (generic)		2
Hydroxynitrile (generic)		1
3-Hydroxynitrobenzene		1			NIST
4-Hydroxynitrobenzene		1		Wikipedia	NIST
Hydroxynitroyl (generic)
2-Hydroxypentanenitrile		1			NIST
4-(1-(4-Hydroxyphenyl)-1-methylethyl)phenol		1	1	Wikipedia	NIST
N-(-4-hydroxyphenyl)ethanamide				Wikipedia	NIST
Hydroxyphosphane, alkyl (generic)
Hydroxyphosphane, dialkyl (generic)
2-Hydroxypropane		9	8	Wikipedia	NIST
3-Hydroxypropanenitrile		1	3		NIST
(2R)-2-Hydroxy propanoate ion		2			NIST
3-Hydroxypropionitrile		1	3		NIST
(2S)-Hydroxysuccinic acid		1	1	Wikipedia	NIST
D/L Hydroxysuccinic acid		1		Wikipedia	NIST
beta-Hydroxythioether (generic)		1
Hypersthene	(Mg,Fe)SiO3			Wikipedia
Hypnotic (generic)	Hypnotic			Wikipedia
Hypo	Na2S2O3	5	4	Wikipedia	NIST
Hypobromite ion	[BrO]–	1	2		NIST
Hypobromous acid	HOBr	4	1	Wikipedia	NIST
Hypochlorite ion	[ClO]–	2	5	Wikipedia	NIST
Hypochlorous acid	HClO	6	4	Wikipedia	NIST
Hypochlorous anhydride	Cl2O	1	3	Wikipedia	NIST
Hypoflourite ion	[FO]–		1		NIST
Hypofluouous acid	HOF	2	1		NIST
Hypoiodite ion	[IO]–	1	3		NIST
Hypoiodous acid	HOI	5		Wikipedia	NIST
Hyponitrite ion	[N2O2]2–				NIST
Hypophosphite ion	[H2PO2]–	2	1		NIST
Hypophosphoric acid			1		NIST
Hypophosphorous acid	H3PO2	2	2	Wikipedia	NIST
Hyriodic acid	HI	12	13	Wikipedia	NIST

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© Mark R. Leach 1999 –

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