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database: IUPAC Standards Online
database: IUPAC Standards Online

IUPAC Standards Online

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Overview

About this database

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IUPAC Standards Online is a database built from IUPAC’s standards and recommendations, which are extracted from the journal Pure and Applied Chemistry (PAC). The International Union of Pure and Applied Chemistry (IUPAC) is the organization responsible for setting the standards in chemistry that are internationally binding for scientists in industry and academia, patent lawyers, toxicologists, environmental scientists, legislation, etc. “Standards” are definitions of terms, standard values, procedures, rules for naming compounds and materials, names and properties of elements in the periodic table, and many more. The database is the only product that provides for the quick and easy search and retrieval of IUPAC’s standards and recommendations which until now have remained unclassified within the huge Pure and Applied Chemistry archive.

Covered topics:

  • Analytical Chemistry
  • Biochemistry
  • Chemical Safety
  • Data Management
  • Education
  • Environmental Chemistry
  • Inorganic Chemistry
  • Materials
  • Medicinal Chemistry
  • Nomenclature and Terminology
  • Nuclear Chemistry
  • Organic Chemistry
  • Physical Chemistry
  • Theoretical & Computational Chemistry
  • Toxicology

IUPAC and De Gruyter

In addition to the IUPAC Standards Database, De Gruyter is proud to partner with IUPAC in the publication of the society's flagship monthly journal, Pure and Applied Chemistry, as well as the society's quarterly newsmagazine, Chemistry International, and the new Open Access journal Chemistry Teacher International. Links to all of the IUPAC Content available on De Gruyter Online can be found at the IUPAC & De Gruyter Home Page, alongside special content, such as themed Virtual Issues of content drawn from across journals and volume years.

Your Benefits

  • Useful: IUPAC’s standards and recommendations easily discoverable
  • Comprehensive: standard values and procedures, nomenclature, terminology and symbols in chemistry, properties of elements
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Supplementary Materials

Periodic Table

IUPAC Periodic Table of the Elements
1 H hydrogen
1.008 ±0.0002
1
2 He helium
4.0026 ±0.0001
18
3 Li lithium
6.94 ±0.06
4 Be beryllium
9.0122 ±0.0001
2
5 B boron
10.81 ±0.02
13
6 C carbon
12.011 ±0.002
14
7 N nitrogen
14.007 ±0.001
15
8 O oxygen
15.999 ±0.001
16
9 F fluorine
18.998 ±0.001
17
10 Ne neon
20.18 ±0.001
11 Na sodium
22.99 ±0.001
12 Mg magnesium
24.305 ±0.002
13 Al aluminium
26.982 ±0.001
14 Si silicon
28.085 ±0.001
15 P phosphorus
30.974 ±0.001
16 S sulfur
32.06 ±0.02
17 Cl chlorine
35.45 ±0.01
18 Ar argon
39.95 ±0.16
19 K potassium
39.098 ±0.001
20 Ca calcium
40.078 ±0.004
21 Sc scandium
44.956 ±0.001
3
22 Ti titanium
47.867 ±0.001
4
23 V vanadium
50.942 ±0.001
5
24 Cr chromium
51.996 ±0.001
6
25 Mn manganese
54.938 ±0.001
7
26 Fe iron
55.845 ±0.002
8
27 Co cobalt
58.933 ±0.001
9
28 Ni nickel
58.693 ±0.001
10
29 Cu copper
63.546 ±0.003
11
30 Zn zinc
65.38 ±0.02
12
31 Ga gallium
69.723 ±0.001
32 Ge germanium
72.63 ±0.008
33 As arsenic
74.922 ±0.001
34 Se selenium
78.971 ±0.008
35 Br bromine
79.904 ±0.003
36 Kr krypton
83.798 ±0.002
37 Rb rubidium
85.468 ±0.001
38 Sr strontium
87.62 ±0.01
39 Y yttrium
88.906 ±0.001
40 Zr zirconium
91.224 ±0.002
41 Nb niobium
92.906 ±0.001
42 Mo molybdenum
95.95 ±0.01
43 Tc technetium
[97]
44 Ru ruthenium
101.07 ±0.02
45 Rh rhodium
102.91 ±0.01
46 Pd palladium
106.42 ±0.01
47 Ag silver
107.87 ±0.01
48 Cd cadmium
112.41 ±0.01
49 In indium
114.82 ±0.01
50 Sn tin
118.71 ±0.01
51 Sb antimony
121.76 ±0.01
52 Te tellurium
127.6 ±0.03
53 I iodine
126.9 ±0.01
54 Xe xenon
131.29 ±0.01
55 Cs caesium
132.91 ±0.01
56 Ba barium
137.33 ±0.01
57-71 lanthanoids
72 Hf hafnium
178.49 ±0.01
73 Ta tantalum
180.95 ±0.01
74 W tungsten
183.84 ±0.01
75 Re rhenium
186.21 ±0.01
76 Os osmium
190.23 ±0.03
77 Ir iridium
192.22 ±0.01
78 Pt platinum
195.08 ±0.02
79 Au gold
196.97 ±0.01
80 Hg mercury
200.59 ±0.01
81 Tl thallium
204.38 ±0.01
82 Pb lead
207.2 ±1.1
83 Bi bismuth
208.98 ±0.01
84 Po polonium
[209]
85 At astatine
[210]
86 Rn radon
[222]
87 Fr francium
[223]
88 Ra radium
[226]
89-103 actinoids
104 Rf rutherfordium
[267]
105 Db dubnium
[268]
106 Sg seaborgium
[269]
107 Bh bohrium
[270]
108 Hs hassium
[269]
109 Mt meitnerium
[277]
110 Ds darmstadtium
[281]
111 Rg roentgenium
[282]
112 Cn copernicium
[285]
113 Nh nihonium
[286]
114 Fl flerovium
[290]
115 Mc moscovium
[290]
116 Lv livermorium
[293]
117 Ts tennessine
[294]
118 Og oganesson
[294]
IUOPAC Logo
57 La lanthanum
138.91 ±0.01
58 Ce cerium
140.12 ±0.01
59 Pr praseodymium
140.91 ±0.01
60 Nd neodymium
144.24 ±0.01
61 Pm promethium
[145]
62 Sm samarium
150.36 ±0.02
63 Eu europium
151.96 ±0.01
64 Gd gadolinium
157.25 ±0.03
65 Tb terbium
158.93 ±0.01
66 Dy dysprosium
162.5 ±0.01
67 Ho holmium
164.93 ±0.01
68 Er erbium
167.26 ±0.01
69 Tm thulium
168.93 ±0.01
70 Yb ytterbium
173.05 ±0.02
71 Lu lutetium
174.97 ±0.01
89 Ac actinium
[227]
90 Th thorium
232.04 ±0.01
91 Pa protactinium
231.04 ±0.01
92 U uranium
238.03 ±0.01
93 Np neptunium
[237]
94 Pu plutonium
[244]
95 Am americium
[243]
96 Cm curium
[247]
97 Bk berkelium
[247]
98 Cf californium
[251]
99 Es einsteinium
[252]
100 Fm fermium
[257]
101 Md mendelevium
[258]
102 No nobelium
[259]
103 Lr lawrencium
[262]
Key:
atomic number Symbol name
abridged standard atomic weight
For notes and updates to this table, see www.iupac.org. This version is dated 4 May 2022.
Copyright © 2022 IUPAC, the International Union of Pure and Applied Chemistry
IUPAC Periodic Table of the Elements
1 H hydrogen
1.008 ±0.0002
2 He helium
4.0026 ±0.0001
3 Li lithium
6.94 ±0.06
4 Be beryllium
9.0122 ±0.0001
5 B boron
10.81 ±0.02
6 C carbon
12.011 ±0.002
7 N nitrogen
14.007 ±0.001
8 O oxygen
15.999 ±0.001
9 F fluorine
18.998 ±0.001
10 Ne neon
20.18 ±0.001
11 Na sodium
22.99 ±0.001
12 Mg magnesium
24.305 ±0.002
13 Al aluminium
26.982 ±0.001
14 Si silicon
28.085 ±0.001
15 P phosphorus
30.974 ±0.001
16 S sulfur
32.06 ±0.02
17 Cl chlorine
35.45 ±0.01
18 Ar argon
39.95 ±0.16
19 K potassium
39.098 ±0.001
20 Ca calcium
40.078 ±0.004
21 Sc scandium
44.956 ±0.001
22 Ti titanium
47.867 ±0.001
23 V vanadium
50.942 ±0.001
24 Cr chromium
51.996 ±0.001
25 Mn manganese
54.938 ±0.001
26 Fe iron
55.845 ±0.002
27 Co cobalt
58.933 ±0.001
28 Ni nickel
58.693 ±0.001
29 Cu copper
63.546 ±0.003
30 Zn zinc
65.38 ±0.02
31 Ga gallium
69.723 ±0.001
32 Ge germanium
72.63 ±0.008
33 As arsenic
74.922 ±0.001
34 Se selenium
78.971 ±0.008
35 Br bromine
79.904 ±0.003
36 Kr krypton
83.798 ±0.002
37 Rb rubidium
85.468 ±0.001
38 Sr strontium
87.62 ±0.01
39 Y yttrium
88.906 ±0.001
40 Zr zirconium
91.224 ±0.002
41 Nb niobium
92.906 ±0.001
42 Mo molybdenum
95.95 ±0.01
43 Tc technetium
[97]
44 Ru ruthenium
101.07 ±0.02
45 Rh rhodium
102.91 ±0.01
46 Pd palladium
106.42 ±0.01
47 Ag silver
107.87 ±0.01
48 Cd cadmium
112.41 ±0.01
49 In indium
114.82 ±0.01
50 Sn tin
118.71 ±0.01
51 Sb antimony
121.76 ±0.01
52 Te tellurium
127.6 ±0.03
53 I iodine
126.9 ±0.01
54 Xe xenon
131.29 ±0.01
55 Cs caesium
132.91 ±0.01
56 Ba barium
137.33 ±0.01
57 La lanthanum
138.91 ±0.01
58 Ce cerium
140.12 ±0.01
59 Pr praseodymium
140.91 ±0.01
60 Nd neodymium
144.24 ±0.01
61 Pm promethium
[145]
62 Sm samarium
150.36 ±0.02
63 Eu europium
151.96 ±0.01
64 Gd gadolinium
157.25 ±0.03
65 Tb terbium
158.93 ±0.01
66 Dy dysprosium
162.5 ±0.01
67 Ho holmium
164.93 ±0.01
68 Er erbium
167.26 ±0.01
69 Tm thulium
168.93 ±0.01
70 Yb ytterbium
173.05 ±0.02
71 Lu lutetium
174.97 ±0.01
72 Hf hafnium
178.49 ±0.01
73 Ta tantalum
180.95 ±0.01
74 W tungsten
183.84 ±0.01
75 Re rhenium
186.21 ±0.01
76 Os osmium
190.23 ±0.03
77 Ir iridium
192.22 ±0.01
78 Pt platinum
195.08 ±0.02
79 Au gold
196.97 ±0.01
80 Hg mercury
200.59 ±0.01
81 Tl thallium
204.38 ±0.01
82 Pb lead
207.2 ±1.1
83 Bi bismuth
208.98 ±0.01
84 Po polonium
[209]
85 At astatine
[210]
86 Rn radon
[222]
87 Fr francium
[223]
88 Ra radium
[226]
89 Ac actinium
[227]
90 Th thorium
232.04 ±0.01
91 Pa protactinium
231.04 ±0.01
92 U uranium
238.03 ±0.01
93 Np neptunium
[237]
94 Pu plutonium
[244]
95 Am americium
[243]
96 Cm curium
[247]
97 Bk berkelium
[247]
98 Cf californium
[251]
99 Es einsteinium
[252]
100 Fm fermium
[257]
101 Md mendelevium
[258]
102 No nobelium
[259]
103 Lr lawrencium
[262]
104 Rf rutherfordium
[267]
105 Db dubnium
[268]
106 Sg seaborgium
[269]
107 Bh bohrium
[270]
108 Hs hassium
[269]
109 Mt meitnerium
[277]
110 Ds darmstadtium
[281]
111 Rg roentgenium
[282]
112 Cn copernicium
[285]
113 Nh nihonium
[286]
114 Fl flerovium
[290]
115 Mc moscovium
[290]
116 Lv livermorium
[293]
117 Ts tennessine
[294]
118 Og oganesson
[294]
IUOPAC Logo
For notes and updates to this table, see www.iupac.org. This version is dated 4 May 2022.
Copyright © 2022 IUPAC, the International Union of Pure and Applied Chemistry

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Updates

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Last updated on 20.05.2022

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