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| Examples: | Cf. Rules |
| 1,2-Ethanediol | C-10.3 |
| 2,3-Naphthalenediacetic acid | C-52.2 |
| Triethylamine | C-11.41 |
| 4-Chloro-2,4'-iminodibenzoic acid | C-73.1 |
The forms bis-, tris-, tetrakis-, pentakis-, etc., are used to indicate a set of identical radicals or parent compounds each substituted in the same way (cf. Rule A-2.5):
| Examples: | Cf. Rule |
| Bis(2-chloroethyl)amine | C-814.2 |
| 2,7-Bis(phenylazo)-1,8-naphthalenediol | C-912.5 |
or to avoid ambiguity:
| Examples: | Cf. Rule |
| p-Phenylenebisketene | C-321.1 |
| 7-(Aminomethyl)-2,3-dibenzofuranbis- (ethylamine) |
C-813.4 |
| Tris(decyl)amine | C-814.2 |
Bi-, ter-, quater-, etc. are used to indicate the number of identical rings joined to one another by a link (single or double) (cf. note to Rule C-14.11):
| Examples: | Cf. Rule |
| Biphenyl | A-52.4 |
| 2,1':5',2":6",2"'-Quaternaphthalene | A-52.2 |
| [1,1'-Binaphthalene]-3,3',4,4'-tetramine | C-71.3 |
| 3,4'-Bi-2-naphthol | C-71.4 |
Multiplying affixes may be omitted for very common compounds when no ambiguity is caused thereby, for example, phenyl ether for diphenyl ether, malonamide for malondiamide. Such affixes are, however, included throughout the text below for uniformity.
See Recommendations'93 R-0.1.4
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